89 Cherokee failed emissions - HELP!
 

4.0 Inline 6
4X4, A/C, PS, Auto
205+K miles
My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
This is what has been done.
New O2 sensor (Bosch 12009)
New Fuel regulator
New Cat converter
New plugs, wires, cap, rotor
new oil, new filters
cleaned and replaced CCV hoses, vacuum hoses
Nothing has helped!
I had already replaced the OEM fuel injectors with new ones type
JeepDenso XL5E a while back before this emissions test. These are 19
LB Pintle type.
It passed last year just barely with the old original injectors. The
HC was 162 and the CO was 1.98 in 2003.
In 2002 the HC was 89 and the CO was .16. Something has happened
between 2002 and 2003.
The shop I took it to tells me that the O2 sensor is not going
into "Closed Loop" ?They tried another O2 sensor with same results.
They suspect a bad ECM or the new injectors are not the correct type.
They have given up.
$800 later I am asking for help. Anyone with some ideas or info will
be most appreciated...

Randy Perkins
Fort Worth, Texas
wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

The original O2 sensor is under recall and I do not believe the
aftermarked Bosch unit will work with the french renix computer you
have.

I also spent money on my 88 then I finally I had spent enough to get an
exemption when the damn $tealer's computer wouldn't give the exemption!
Turns out the computer was smart enough to know there was a recall on
the O2, unlike the techs that worked there.....

Put the 'free' O2 in and the readings have been low for the last two
tests since.

I also got a bunch of my money back on the BS parts changing and called
the pricks for charging a GST tax when it is exempt so got 2 or 3 test
costs plus the extra tax on the final test back.

Stupid freaking 'mechanics'! I took it to a $tealer to avoid the BS
from recalls and such, but they are worse than anyone!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Randy Perkins wrote:
>
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

The original O2 sensor is under recall and I do not believe the
aftermarked Bosch unit will work with the french renix computer you
have.

I also spent money on my 88 then I finally I had spent enough to get an
exemption when the damn $tealer's computer wouldn't give the exemption!
Turns out the computer was smart enough to know there was a recall on
the O2, unlike the techs that worked there.....

Put the 'free' O2 in and the readings have been low for the last two
tests since.

I also got a bunch of my money back on the BS parts changing and called
the pricks for charging a GST tax when it is exempt so got 2 or 3 test
costs plus the extra tax on the final test back.

Stupid freaking 'mechanics'! I took it to a $tealer to avoid the BS
from recalls and such, but they are worse than anyone!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Randy Perkins wrote:
>
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

The original O2 sensor is under recall and I do not believe the
aftermarked Bosch unit will work with the french renix computer you
have.

I also spent money on my 88 then I finally I had spent enough to get an
exemption when the damn $tealer's computer wouldn't give the exemption!
Turns out the computer was smart enough to know there was a recall on
the O2, unlike the techs that worked there.....

Put the 'free' O2 in and the readings have been low for the last two
tests since.

I also got a bunch of my money back on the BS parts changing and called
the pricks for charging a GST tax when it is exempt so got 2 or 3 test
costs plus the extra tax on the final test back.

Stupid freaking 'mechanics'! I took it to a $tealer to avoid the BS
from recalls and such, but they are worse than anyone!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Randy Perkins wrote:
>
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

The original O2 sensor is under recall and I do not believe the
aftermarked Bosch unit will work with the french renix computer you
have.

I also spent money on my 88 then I finally I had spent enough to get an
exemption when the damn $tealer's computer wouldn't give the exemption!
Turns out the computer was smart enough to know there was a recall on
the O2, unlike the techs that worked there.....

Put the 'free' O2 in and the readings have been low for the last two
tests since.

I also got a bunch of my money back on the BS parts changing and called
the pricks for charging a GST tax when it is exempt so got 2 or 3 test
costs plus the extra tax on the final test back.

Stupid freaking 'mechanics'! I took it to a $tealer to avoid the BS
from recalls and such, but they are worse than anyone!

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Randy Perkins wrote:
>
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

First, lose the bosch O2 sensor. They're nothing but trouble. Put the factory
one on.

Second, it's a heated O2 sensor. If the heater circuits aren't working
correctly, you'll never see 'closed loop'. Needs the right thermostat too.

Third, expect to see those nice low NOx numbers rise as you lean out the
mixture.

Fourth, slap the fool that put the new cat on a vehicle that's cranking out over
9% CO.

That's a start.


In message <eccc3a62.0408011848.1b2a3d1b@posting.google.com >, "Randy Perkins"
wrote:

>4.0 Inline 6
>4X4, A/C, PS, Auto
>205+K miles
>My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
>the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
>This is what has been done.
>New O2 sensor (Bosch 12009)
>New Fuel regulator
>New Cat converter
>New plugs, wires, cap, rotor
>new oil, new filters
>cleaned and replaced CCV hoses, vacuum hoses
>Nothing has helped!
>I had already replaced the OEM fuel injectors with new ones type
>JeepDenso XL5E a while back before this emissions test. These are 19
>LB Pintle type.
>It passed last year just barely with the old original injectors. The
>HC was 162 and the CO was 1.98 in 2003.
>In 2002 the HC was 89 and the CO was .16. Something has happened
>between 2002 and 2003.
>The shop I took it to tells me that the O2 sensor is not going
>into "Closed Loop" ?They tried another O2 sensor with same results.
>They suspect a bad ECM or the new injectors are not the correct type.
>They have given up.
>$800 later I am asking for help. Anyone with some ideas or info will
>be most appreciated...
>
>Randy Perkins
>Fort Worth, Texas
>wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

First, lose the bosch O2 sensor. They're nothing but trouble. Put the factory
one on.

Second, it's a heated O2 sensor. If the heater circuits aren't working
correctly, you'll never see 'closed loop'. Needs the right thermostat too.

Third, expect to see those nice low NOx numbers rise as you lean out the
mixture.

Fourth, slap the fool that put the new cat on a vehicle that's cranking out over
9% CO.

That's a start.


In message <eccc3a62.0408011848.1b2a3d1b@posting.google.com >, "Randy Perkins"
wrote:

>4.0 Inline 6
>4X4, A/C, PS, Auto
>205+K miles
>My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
>the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
>This is what has been done.
>New O2 sensor (Bosch 12009)
>New Fuel regulator
>New Cat converter
>New plugs, wires, cap, rotor
>new oil, new filters
>cleaned and replaced CCV hoses, vacuum hoses
>Nothing has helped!
>I had already replaced the OEM fuel injectors with new ones type
>JeepDenso XL5E a while back before this emissions test. These are 19
>LB Pintle type.
>It passed last year just barely with the old original injectors. The
>HC was 162 and the CO was 1.98 in 2003.
>In 2002 the HC was 89 and the CO was .16. Something has happened
>between 2002 and 2003.
>The shop I took it to tells me that the O2 sensor is not going
>into "Closed Loop" ?They tried another O2 sensor with same results.
>They suspect a bad ECM or the new injectors are not the correct type.
>They have given up.
>$800 later I am asking for help. Anyone with some ideas or info will
>be most appreciated...
>
>Randy Perkins
>Fort Worth, Texas
>wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

First, lose the bosch O2 sensor. They're nothing but trouble. Put the factory
one on.

Second, it's a heated O2 sensor. If the heater circuits aren't working
correctly, you'll never see 'closed loop'. Needs the right thermostat too.

Third, expect to see those nice low NOx numbers rise as you lean out the
mixture.

Fourth, slap the fool that put the new cat on a vehicle that's cranking out over
9% CO.

That's a start.


In message <eccc3a62.0408011848.1b2a3d1b@posting.google.com >, "Randy Perkins"
wrote:

>4.0 Inline 6
>4X4, A/C, PS, Auto
>205+K miles
>My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
>the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
>This is what has been done.
>New O2 sensor (Bosch 12009)
>New Fuel regulator
>New Cat converter
>New plugs, wires, cap, rotor
>new oil, new filters
>cleaned and replaced CCV hoses, vacuum hoses
>Nothing has helped!
>I had already replaced the OEM fuel injectors with new ones type
>JeepDenso XL5E a while back before this emissions test. These are 19
>LB Pintle type.
>It passed last year just barely with the old original injectors. The
>HC was 162 and the CO was 1.98 in 2003.
>In 2002 the HC was 89 and the CO was .16. Something has happened
>between 2002 and 2003.
>The shop I took it to tells me that the O2 sensor is not going
>into "Closed Loop" ?They tried another O2 sensor with same results.
>They suspect a bad ECM or the new injectors are not the correct type.
>They have given up.
>$800 later I am asking for help. Anyone with some ideas or info will
>be most appreciated...
>
>Randy Perkins
>Fort Worth, Texas
>wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

First, lose the bosch O2 sensor. They're nothing but trouble. Put the factory
one on.

Second, it's a heated O2 sensor. If the heater circuits aren't working
correctly, you'll never see 'closed loop'. Needs the right thermostat too.

Third, expect to see those nice low NOx numbers rise as you lean out the
mixture.

Fourth, slap the fool that put the new cat on a vehicle that's cranking out over
9% CO.

That's a start.


In message <eccc3a62.0408011848.1b2a3d1b@posting.google.com >, "Randy Perkins"
wrote:

>4.0 Inline 6
>4X4, A/C, PS, Auto
>205+K miles
>My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
>the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
>This is what has been done.
>New O2 sensor (Bosch 12009)
>New Fuel regulator
>New Cat converter
>New plugs, wires, cap, rotor
>new oil, new filters
>cleaned and replaced CCV hoses, vacuum hoses
>Nothing has helped!
>I had already replaced the OEM fuel injectors with new ones type
>JeepDenso XL5E a while back before this emissions test. These are 19
>LB Pintle type.
>It passed last year just barely with the old original injectors. The
>HC was 162 and the CO was 1.98 in 2003.
>In 2002 the HC was 89 and the CO was .16. Something has happened
>between 2002 and 2003.
>The shop I took it to tells me that the O2 sensor is not going
>into "Closed Loop" ?They tried another O2 sensor with same results.
>They suspect a bad ECM or the new injectors are not the correct type.
>They have given up.
>$800 later I am asking for help. Anyone with some ideas or info will
>be most appreciated...
>
>Randy Perkins
>Fort Worth, Texas
>wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
problem. It just passed the Illinois emission test either late last year or
early this year..........I forget. <g>

Did that shop plug into your ECM to see what was happening?

Other things that may cause your problem are your:
1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
closed loop!
2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
3. Are you sure those injectors are the right ones?

I stocked up on new 02s in case I need one or my parents' 88 XJ or another
Jeeper needs one. :-)
Oh and I should have a couple of used ECMs around here somewhere too!

later,
dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
problem. It just passed the Illinois emission test either late last year or
early this year..........I forget. <g>

Did that shop plug into your ECM to see what was happening?

Other things that may cause your problem are your:
1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
closed loop!
2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
3. Are you sure those injectors are the right ones?

I stocked up on new 02s in case I need one or my parents' 88 XJ or another
Jeeper needs one. :-)
Oh and I should have a couple of used ECMs around here somewhere too!

later,
dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
problem. It just passed the Illinois emission test either late last year or
early this year..........I forget. <g>

Did that shop plug into your ECM to see what was happening?

Other things that may cause your problem are your:
1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
closed loop!
2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
3. Are you sure those injectors are the right ones?

I stocked up on new 02s in case I need one or my parents' 88 XJ or another
Jeeper needs one. :-)
Oh and I should have a couple of used ECMs around here somewhere too!

later,
dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
problem. It just passed the Illinois emission test either late last year or
early this year..........I forget. <g>

Did that shop plug into your ECM to see what was happening?

Other things that may cause your problem are your:
1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
closed loop!
2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
3. Are you sure those injectors are the right ones?

I stocked up on new 02s in case I need one or my parents' 88 XJ or another
Jeeper needs one. :-)
Oh and I should have a couple of used ECMs around here somewhere too!

later,
dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

Hey Dave,
Thanks for the info. I have had two folks tell me that they had
problems getting the Bosch O2 sensor to work. I am also going to check
the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
to give me some more time to deal with the problem. I called the
dealer in California about the injectors and they assure me that they
are the correct ones. Possibly you or someone knows if these 19 pound
pintle type are correct?
Thanks, Randy


"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<fbCPc.2410$hI.734974@newssvr28.news.prodigy. com>...
> I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
> problem. It just passed the Illinois emission test either late last year or
> early this year..........I forget. <g>
>
> Did that shop plug into your ECM to see what was happening?
>
> Other things that may cause your problem are your:
> 1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
> closed loop!
> 2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
> 3. Are you sure those injectors are the right ones?
>
> I stocked up on new 02s in case I need one or my parents' 88 XJ or another
> Jeeper needs one. :-)
> Oh and I should have a couple of used ECMs around here somewhere too!
>
> later,
> dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

Hey Dave,
Thanks for the info. I have had two folks tell me that they had
problems getting the Bosch O2 sensor to work. I am also going to check
the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
to give me some more time to deal with the problem. I called the
dealer in California about the injectors and they assure me that they
are the correct ones. Possibly you or someone knows if these 19 pound
pintle type are correct?
Thanks, Randy


"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<fbCPc.2410$hI.734974@newssvr28.news.prodigy. com>...
> I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
> problem. It just passed the Illinois emission test either late last year or
> early this year..........I forget. <g>
>
> Did that shop plug into your ECM to see what was happening?
>
> Other things that may cause your problem are your:
> 1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
> closed loop!
> 2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
> 3. Are you sure those injectors are the right ones?
>
> I stocked up on new 02s in case I need one or my parents' 88 XJ or another
> Jeeper needs one. :-)
> Oh and I should have a couple of used ECMs around here somewhere too!
>
> later,
> dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

Hey Dave,
Thanks for the info. I have had two folks tell me that they had
problems getting the Bosch O2 sensor to work. I am also going to check
the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
to give me some more time to deal with the problem. I called the
dealer in California about the injectors and they assure me that they
are the correct ones. Possibly you or someone knows if these 19 pound
pintle type are correct?
Thanks, Randy


"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<fbCPc.2410$hI.734974@newssvr28.news.prodigy. com>...
> I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
> problem. It just passed the Illinois emission test either late last year or
> early this year..........I forget. <g>
>
> Did that shop plug into your ECM to see what was happening?
>
> Other things that may cause your problem are your:
> 1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
> closed loop!
> 2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
> 3. Are you sure those injectors are the right ones?
>
> I stocked up on new 02s in case I need one or my parents' 88 XJ or another
> Jeeper needs one. :-)
> Oh and I should have a couple of used ECMs around here somewhere too!
>
> later,
> dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

Hey Dave,
Thanks for the info. I have had two folks tell me that they had
problems getting the Bosch O2 sensor to work. I am also going to check
the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
to give me some more time to deal with the problem. I called the
dealer in California about the injectors and they assure me that they
are the correct ones. Possibly you or someone knows if these 19 pound
pintle type are correct?
Thanks, Randy


"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<fbCPc.2410$hI.734974@newssvr28.news.prodigy. com>...
> I am running a Bosch 02 sensor on my 88 XJ 4.0 for about 3 years with no
> problem. It just passed the Illinois emission test either late last year or
> early this year..........I forget. <g>
>
> Did that shop plug into your ECM to see what was happening?
>
> Other things that may cause your problem are your:
> 1. CTS (Coolant Temperature Sensor). It may be faulty and not allowing the
> closed loop!
> 2. MAP may cause a rich mixture, so you need to check the vacuum to it also!
> 3. Are you sure those injectors are the right ones?
>
> I stocked up on new 02s in case I need one or my parents' 88 XJ or another
> Jeeper needs one. :-)
> Oh and I should have a couple of used ECMs around here somewhere too!
>
> later,
> dave AKA vwdoc1

Re: 89 Cherokee failed emissions - HELP!
 

Have you considered converting to propane?

Re: 89 Cherokee failed emissions - HELP!
 

Have you considered converting to propane?

Re: 89 Cherokee failed emissions - HELP!
 

Have you considered converting to propane?

Re: 89 Cherokee failed emissions - HELP!
 

Have you considered converting to propane?

Re: 89 Cherokee failed emissions - HELP!
 

It would be less expensive if you found a shop, or person, that could plug
into your 89 XJ to see what the ECM sees! A good shop might have one of the
Snap-On Scanners that might have an adapter to hook up to yours.

19 lb fuel injectors sound right BTW. ;-)

good luck,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> Hey Dave,
> Thanks for the info. I have had two folks tell me that they had
> problems getting the Bosch O2 sensor to work. I am also going to check
> the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> to give me some more time to deal with the problem. I called the
> dealer in California about the injectors and they assure me that they
> are the correct ones. Possibly you or someone knows if these 19 pound
> pintle type are correct?
> Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

It would be less expensive if you found a shop, or person, that could plug
into your 89 XJ to see what the ECM sees! A good shop might have one of the
Snap-On Scanners that might have an adapter to hook up to yours.

19 lb fuel injectors sound right BTW. ;-)

good luck,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> Hey Dave,
> Thanks for the info. I have had two folks tell me that they had
> problems getting the Bosch O2 sensor to work. I am also going to check
> the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> to give me some more time to deal with the problem. I called the
> dealer in California about the injectors and they assure me that they
> are the correct ones. Possibly you or someone knows if these 19 pound
> pintle type are correct?
> Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

It would be less expensive if you found a shop, or person, that could plug
into your 89 XJ to see what the ECM sees! A good shop might have one of the
Snap-On Scanners that might have an adapter to hook up to yours.

19 lb fuel injectors sound right BTW. ;-)

good luck,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> Hey Dave,
> Thanks for the info. I have had two folks tell me that they had
> problems getting the Bosch O2 sensor to work. I am also going to check
> the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> to give me some more time to deal with the problem. I called the
> dealer in California about the injectors and they assure me that they
> are the correct ones. Possibly you or someone knows if these 19 pound
> pintle type are correct?
> Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

It would be less expensive if you found a shop, or person, that could plug
into your 89 XJ to see what the ECM sees! A good shop might have one of the
Snap-On Scanners that might have an adapter to hook up to yours.

19 lb fuel injectors sound right BTW. ;-)

good luck,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> Hey Dave,
> Thanks for the info. I have had two folks tell me that they had
> problems getting the Bosch O2 sensor to work. I am also going to check
> the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> to give me some more time to deal with the problem. I called the
> dealer in California about the injectors and they assure me that they
> are the correct ones. Possibly you or someone knows if these 19 pound
> pintle type are correct?
> Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

Dave, the shop I took it to is an authorized emissions repair
facility. They had it on the scanner/analyzer and what they tell me is
it shows that the O2 sensor is not going into closed loop mode. Not
sure if I have the correct terminology. Most of the feedback I get it
seems that the ECM is what goes into closed or open loop..?? I am
going to let the Jeep dealer put in the OEM O2 sensor (free on a
recall) and then look at all the sensors input to the ECM. Could be
that my ECM is bad...??Thanks for the info about the 19 LB fuel
injectors. Any input is most appreciated.
All the best, Randy

"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<o0YPc.67$r_1.22071@newssvr28.news.prodigy.co m>...
> It would be less expensive if you found a shop, or person, that could plug
> into your 89 XJ to see what the ECM sees! A good shop might have one of the
> Snap-On Scanners that might have an adapter to hook up to yours.
>
> 19 lb fuel injectors sound right BTW. ;-)
>
> good luck,
> dave AKA vwdoc1
>
> "Randy Perkins" <wb5kcm@hotmail.com> wrote in message
> news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> > Hey Dave,
> > Thanks for the info. I have had two folks tell me that they had
> > problems getting the Bosch O2 sensor to work. I am also going to check
> > the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> > to give me some more time to deal with the problem. I called the
> > dealer in California about the injectors and they assure me that they
> > are the correct ones. Possibly you or someone knows if these 19 pound
> > pintle type are correct?
> > Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

Dave, the shop I took it to is an authorized emissions repair
facility. They had it on the scanner/analyzer and what they tell me is
it shows that the O2 sensor is not going into closed loop mode. Not
sure if I have the correct terminology. Most of the feedback I get it
seems that the ECM is what goes into closed or open loop..?? I am
going to let the Jeep dealer put in the OEM O2 sensor (free on a
recall) and then look at all the sensors input to the ECM. Could be
that my ECM is bad...??Thanks for the info about the 19 LB fuel
injectors. Any input is most appreciated.
All the best, Randy

"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<o0YPc.67$r_1.22071@newssvr28.news.prodigy.co m>...
> It would be less expensive if you found a shop, or person, that could plug
> into your 89 XJ to see what the ECM sees! A good shop might have one of the
> Snap-On Scanners that might have an adapter to hook up to yours.
>
> 19 lb fuel injectors sound right BTW. ;-)
>
> good luck,
> dave AKA vwdoc1
>
> "Randy Perkins" <wb5kcm@hotmail.com> wrote in message
> news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> > Hey Dave,
> > Thanks for the info. I have had two folks tell me that they had
> > problems getting the Bosch O2 sensor to work. I am also going to check
> > the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> > to give me some more time to deal with the problem. I called the
> > dealer in California about the injectors and they assure me that they
> > are the correct ones. Possibly you or someone knows if these 19 pound
> > pintle type are correct?
> > Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

Dave, the shop I took it to is an authorized emissions repair
facility. They had it on the scanner/analyzer and what they tell me is
it shows that the O2 sensor is not going into closed loop mode. Not
sure if I have the correct terminology. Most of the feedback I get it
seems that the ECM is what goes into closed or open loop..?? I am
going to let the Jeep dealer put in the OEM O2 sensor (free on a
recall) and then look at all the sensors input to the ECM. Could be
that my ECM is bad...??Thanks for the info about the 19 LB fuel
injectors. Any input is most appreciated.
All the best, Randy

"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<o0YPc.67$r_1.22071@newssvr28.news.prodigy.co m>...
> It would be less expensive if you found a shop, or person, that could plug
> into your 89 XJ to see what the ECM sees! A good shop might have one of the
> Snap-On Scanners that might have an adapter to hook up to yours.
>
> 19 lb fuel injectors sound right BTW. ;-)
>
> good luck,
> dave AKA vwdoc1
>
> "Randy Perkins" <wb5kcm@hotmail.com> wrote in message
> news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> > Hey Dave,
> > Thanks for the info. I have had two folks tell me that they had
> > problems getting the Bosch O2 sensor to work. I am also going to check
> > the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> > to give me some more time to deal with the problem. I called the
> > dealer in California about the injectors and they assure me that they
> > are the correct ones. Possibly you or someone knows if these 19 pound
> > pintle type are correct?
> > Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

Dave, the shop I took it to is an authorized emissions repair
facility. They had it on the scanner/analyzer and what they tell me is
it shows that the O2 sensor is not going into closed loop mode. Not
sure if I have the correct terminology. Most of the feedback I get it
seems that the ECM is what goes into closed or open loop..?? I am
going to let the Jeep dealer put in the OEM O2 sensor (free on a
recall) and then look at all the sensors input to the ECM. Could be
that my ECM is bad...??Thanks for the info about the 19 LB fuel
injectors. Any input is most appreciated.
All the best, Randy

"dave AKA vwdoc1" <NO_vwdoc1_SPAM_@hotmail.com_PLEASE> wrote in message news:<o0YPc.67$r_1.22071@newssvr28.news.prodigy.co m>...
> It would be less expensive if you found a shop, or person, that could plug
> into your 89 XJ to see what the ECM sees! A good shop might have one of the
> Snap-On Scanners that might have an adapter to hook up to yours.
>
> 19 lb fuel injectors sound right BTW. ;-)
>
> good luck,
> dave AKA vwdoc1
>
> "Randy Perkins" <wb5kcm@hotmail.com> wrote in message
> news:eccc3a62.0408030729.5b209d2d@posting.google.c om...
> > Hey Dave,
> > Thanks for the info. I have had two folks tell me that they had
> > problems getting the Bosch O2 sensor to work. I am also going to check
> > the CTS, MAP, MAT and ECM. I am going today and try and get a waiver
> > to give me some more time to deal with the problem. I called the
> > dealer in California about the injectors and they assure me that they
> > are the correct ones. Possibly you or someone knows if these 19 pound
> > pintle type are correct?
> > Thanks, Randy

Re: 89 Cherokee failed emissions - HELP!
 

OK
It is not going into closed loop (when the 02 sensor comes online)
.............Now why is it not going into closed loop is the question!
Yes it could be the 02 sensor.
Also it could be a temperature sensor problem causing it not to go into
closed loop.
Yours was WAY too rich so I would suspect a temperature sensor problem. :-(
And I will ASSuME that the fuel pressure was checked. I think you indicated
that it was.

That shop should have been able to tell you what else was not right.

Let us know!
later,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408051702.5c67192b@posting.google.c om...
> Dave, the shop I took it to is an authorized emissions repair
> facility. They had it on the scanner/analyzer and what they tell me is
> it shows that the O2 sensor is not going into closed loop mode. Not
> sure if I have the correct terminology. Most of the feedback I get it
> seems that the ECM is what goes into closed or open loop..?? I am
> going to let the Jeep dealer put in the OEM O2 sensor (free on a
> recall) and then look at all the sensors input to the ECM. Could be
> that my ECM is bad...??Thanks for the info about the 19 LB fuel
> injectors. Any input is most appreciated.
> All the best, Randy

Re: 89 Cherokee failed emissions - HELP!
 

OK
It is not going into closed loop (when the 02 sensor comes online)
.............Now why is it not going into closed loop is the question!
Yes it could be the 02 sensor.
Also it could be a temperature sensor problem causing it not to go into
closed loop.
Yours was WAY too rich so I would suspect a temperature sensor problem. :-(
And I will ASSuME that the fuel pressure was checked. I think you indicated
that it was.

That shop should have been able to tell you what else was not right.

Let us know!
later,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408051702.5c67192b@posting.google.c om...
> Dave, the shop I took it to is an authorized emissions repair
> facility. They had it on the scanner/analyzer and what they tell me is
> it shows that the O2 sensor is not going into closed loop mode. Not
> sure if I have the correct terminology. Most of the feedback I get it
> seems that the ECM is what goes into closed or open loop..?? I am
> going to let the Jeep dealer put in the OEM O2 sensor (free on a
> recall) and then look at all the sensors input to the ECM. Could be
> that my ECM is bad...??Thanks for the info about the 19 LB fuel
> injectors. Any input is most appreciated.
> All the best, Randy

Re: 89 Cherokee failed emissions - HELP!
 

OK
It is not going into closed loop (when the 02 sensor comes online)
.............Now why is it not going into closed loop is the question!
Yes it could be the 02 sensor.
Also it could be a temperature sensor problem causing it not to go into
closed loop.
Yours was WAY too rich so I would suspect a temperature sensor problem. :-(
And I will ASSuME that the fuel pressure was checked. I think you indicated
that it was.

That shop should have been able to tell you what else was not right.

Let us know!
later,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408051702.5c67192b@posting.google.c om...
> Dave, the shop I took it to is an authorized emissions repair
> facility. They had it on the scanner/analyzer and what they tell me is
> it shows that the O2 sensor is not going into closed loop mode. Not
> sure if I have the correct terminology. Most of the feedback I get it
> seems that the ECM is what goes into closed or open loop..?? I am
> going to let the Jeep dealer put in the OEM O2 sensor (free on a
> recall) and then look at all the sensors input to the ECM. Could be
> that my ECM is bad...??Thanks for the info about the 19 LB fuel
> injectors. Any input is most appreciated.
> All the best, Randy

Re: 89 Cherokee failed emissions - HELP!
 

OK
It is not going into closed loop (when the 02 sensor comes online)
.............Now why is it not going into closed loop is the question!
Yes it could be the 02 sensor.
Also it could be a temperature sensor problem causing it not to go into
closed loop.
Yours was WAY too rich so I would suspect a temperature sensor problem. :-(
And I will ASSuME that the fuel pressure was checked. I think you indicated
that it was.

That shop should have been able to tell you what else was not right.

Let us know!
later,
dave AKA vwdoc1

"Randy Perkins" <wb5kcm@hotmail.com> wrote in message
news:eccc3a62.0408051702.5c67192b@posting.google.c om...
> Dave, the shop I took it to is an authorized emissions repair
> facility. They had it on the scanner/analyzer and what they tell me is
> it shows that the O2 sensor is not going into closed loop mode. Not
> sure if I have the correct terminology. Most of the feedback I get it
> seems that the ECM is what goes into closed or open loop..?? I am
> going to let the Jeep dealer put in the OEM O2 sensor (free on a
> recall) and then look at all the sensors input to the ECM. Could be
> that my ECM is bad...??Thanks for the info about the 19 LB fuel
> injectors. Any input is most appreciated.
> All the best, Randy

Re: 89 Cherokee failed emissions - HELP!
 

Thanks to everyone for the input, it was all helpful. Mike Romain hit
the nail on the head. The Bosch O2 sensor was the problem. Took the
Jeep to dealer for free recall install of new Mopar O2 sensor.
Immediatly took the Jeep to two different emissions test facilities.
It now passes easily! Where the HC was in the 300+ range its now in
the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
learn..Dont run down and buy any old O2 sensor..maybe you will get by
with it but I sure didnt. Thanks again and all the best.
Randy Perkins
Fort Worth, Texas

wb5kcm@hotmail.com (Randy Perkins) wrote in message news:<eccc3a62.0408011848.1b2a3d1b@posting.google. com>...
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

Thanks to everyone for the input, it was all helpful. Mike Romain hit
the nail on the head. The Bosch O2 sensor was the problem. Took the
Jeep to dealer for free recall install of new Mopar O2 sensor.
Immediatly took the Jeep to two different emissions test facilities.
It now passes easily! Where the HC was in the 300+ range its now in
the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
learn..Dont run down and buy any old O2 sensor..maybe you will get by
with it but I sure didnt. Thanks again and all the best.
Randy Perkins
Fort Worth, Texas

wb5kcm@hotmail.com (Randy Perkins) wrote in message news:<eccc3a62.0408011848.1b2a3d1b@posting.google. com>...
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

Thanks to everyone for the input, it was all helpful. Mike Romain hit
the nail on the head. The Bosch O2 sensor was the problem. Took the
Jeep to dealer for free recall install of new Mopar O2 sensor.
Immediatly took the Jeep to two different emissions test facilities.
It now passes easily! Where the HC was in the 300+ range its now in
the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
learn..Dont run down and buy any old O2 sensor..maybe you will get by
with it but I sure didnt. Thanks again and all the best.
Randy Perkins
Fort Worth, Texas

wb5kcm@hotmail.com (Randy Perkins) wrote in message news:<eccc3a62.0408011848.1b2a3d1b@posting.google. com>...
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

Thanks to everyone for the input, it was all helpful. Mike Romain hit
the nail on the head. The Bosch O2 sensor was the problem. Took the
Jeep to dealer for free recall install of new Mopar O2 sensor.
Immediatly took the Jeep to two different emissions test facilities.
It now passes easily! Where the HC was in the 300+ range its now in
the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
learn..Dont run down and buy any old O2 sensor..maybe you will get by
with it but I sure didnt. Thanks again and all the best.
Randy Perkins
Fort Worth, Texas

wb5kcm@hotmail.com (Randy Perkins) wrote in message news:<eccc3a62.0408011848.1b2a3d1b@posting.google. com>...
> 4.0 Inline 6
> 4X4, A/C, PS, Auto
> 205+K miles
> My 89 Cherokee failed emissions test. The HC is 358 (189 standard,
> the CO is 9.6 (2.36 standard). The Nox is good 103 (1233 standard).
> This is what has been done.
> New O2 sensor (Bosch 12009)
> New Fuel regulator
> New Cat converter
> New plugs, wires, cap, rotor
> new oil, new filters
> cleaned and replaced CCV hoses, vacuum hoses
> Nothing has helped!
> I had already replaced the OEM fuel injectors with new ones type
> JeepDenso XL5E a while back before this emissions test. These are 19
> LB Pintle type.
> It passed last year just barely with the old original injectors. The
> HC was 162 and the CO was 1.98 in 2003.
> In 2002 the HC was 89 and the CO was .16. Something has happened
> between 2002 and 2003.
> The shop I took it to tells me that the O2 sensor is not going
> into "Closed Loop" ?They tried another O2 sensor with same results.
> They suspect a bad ECM or the new injectors are not the correct type.
> They have given up.
> $800 later I am asking for help. Anyone with some ideas or info will
> be most appreciated...
>
> Randy Perkins
> Fort Worth, Texas
> wb5kcm@hotmail.com

Re: 89 Cherokee failed emissions - HELP!
 

Hi Randy,
Thanks for telling us. Yours is the first oxygen sensor I've heard
of the the Stealership eat, but then I've never heard of a recall on
them. I bet you'll realize better gas mileage too.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Randy Perkins wrote:
>
> Thanks to everyone for the input, it was all helpful. Mike Romain hit
> the nail on the head. The Bosch O2 sensor was the problem. Took the
> Jeep to dealer for free recall install of new Mopar O2 sensor.
> Immediatly took the Jeep to two different emissions test facilities.
> It now passes easily! Where the HC was in the 300+ range its now in
> the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
> learn..Dont run down and buy any old O2 sensor..maybe you will get by
> with it but I sure didnt. Thanks again and all the best.
> Randy Perkins
> Fort Worth, Texas

Re: 89 Cherokee failed emissions - HELP!
 

Hi Randy,
Thanks for telling us. Yours is the first oxygen sensor I've heard
of the the Stealership eat, but then I've never heard of a recall on
them. I bet you'll realize better gas mileage too.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Randy Perkins wrote:
>
> Thanks to everyone for the input, it was all helpful. Mike Romain hit
> the nail on the head. The Bosch O2 sensor was the problem. Took the
> Jeep to dealer for free recall install of new Mopar O2 sensor.
> Immediatly took the Jeep to two different emissions test facilities.
> It now passes easily! Where the HC was in the 300+ range its now in
> the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
> learn..Dont run down and buy any old O2 sensor..maybe you will get by
> with it but I sure didnt. Thanks again and all the best.
> Randy Perkins
> Fort Worth, Texas

Re: 89 Cherokee failed emissions - HELP!
 

Hi Randy,
Thanks for telling us. Yours is the first oxygen sensor I've heard
of the the Stealership eat, but then I've never heard of a recall on
them. I bet you'll realize better gas mileage too.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Randy Perkins wrote:
>
> Thanks to everyone for the input, it was all helpful. Mike Romain hit
> the nail on the head. The Bosch O2 sensor was the problem. Took the
> Jeep to dealer for free recall install of new Mopar O2 sensor.
> Immediatly took the Jeep to two different emissions test facilities.
> It now passes easily! Where the HC was in the 300+ range its now in
> the 20's. The CO is almost unmeasurable. Fantastic. Well you live and
> learn..Dont run down and buy any old O2 sensor..maybe you will get by
> with it but I sure didnt. Thanks again and all the best.
> Randy Perkins
> Fort Worth, Texas