97 Jeep Cherokee - No Spark
01-17-2007, 07:33 PM
#11
Guest
Posts: n/a
Re: 97 Jeep Cherokee - No Spark
Hi Bob,
Ninety nine percent of the time it will be the Crankshaft Position
Sensor. I would go ahead and replace it:
http://members.***.net/wilsond/Fixes...tml#CPSdetails
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>
Ninety nine percent of the time it will be the Crankshaft Position
Sensor. I would go ahead and replace it:
http://members.***.net/wilsond/Fixes...tml#CPSdetails
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>
01-17-2007, 07:33 PM
#12
Guest
Posts: n/a
Re: 97 Jeep Cherokee - No Spark
Hi Bob,
Ninety nine percent of the time it will be the Crankshaft Position
Sensor. I would go ahead and replace it:
http://members.***.net/wilsond/Fixes...tml#CPSdetails
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>
Ninety nine percent of the time it will be the Crankshaft Position
Sensor. I would go ahead and replace it:
http://members.***.net/wilsond/Fixes...tml#CPSdetails
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>
01-17-2007, 07:33 PM
#13
Guest
Posts: n/a
Re: 97 Jeep Cherokee - No Spark
Hi Bob,
Ninety nine percent of the time it will be the Crankshaft Position
Sensor. I would go ahead and replace it:
http://members.***.net/wilsond/Fixes...tml#CPSdetails
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>
Ninety nine percent of the time it will be the Crankshaft Position
Sensor. I would go ahead and replace it:
http://members.***.net/wilsond/Fixes...tml#CPSdetails
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
<bob.turner@clix.pt> wrote in message
news:1169058517.096718.313280@a75g2000cwd.googlegr oups.com...
> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
> I have had to do is basic servicing. I have had zero faults. Last
> weekend it would not start (no spark or fuel being injected), and a
> friend towed me home. I have since spent several hours on the web to
> try and find a fix. I have read all about the CPS and the cam sensor in
> the distributor, plus checking the fuel pump etc.
>
> So far I have established there is fuel under pressure in the fuel rail
> by pressing the pin on the valve, I checked all fuses and swapped
> around the relays, and I have disconnected and reconnected the battery
> after giving it a full charge. The earth strap from the cyl head to
> bulkhead is in good order. I have disconnected and reconnected the CPS
> several times.
>
> The instruments and warning lights are behaving as normal. i.e. The
> warning lights come on when the ignition is switched on and then go out
> after a few seconds. The check engine light comes on then goes off with
> the others.
>
> I then ran the diagnostics by holding down the trip meter button and
> turning on the ignition. It ran through the numbers from 000000 to
> 999999 and then went back to 0.000. It did not come up with any faults
> or a 55 to say the test was complete. I then tried the test with CPS
> disconnected and still got no fault showing. Whilst indexing through
> 000000 111111 222222 etc., all the gauges seemed to go through a
> sequence increasing in value and then decreasing back to zero.
>
> So the diagnostics do not indicate a problem or even show that the
> battery has been disconneted recently.... But I still have no spark or
> fuel. Any ideas or suggestions. thanks in advance
>
> Bob Turner
>
01-17-2007, 08:14 PM
#14
Guest
Posts: n/a
Re: Re: 97 Jeep Cherokee - No Spark
On Wed, 17 Jan 2007 16:33:29 -0800, "L.W. \(Bill\) ------ III"
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
01-17-2007, 08:14 PM
#15
Guest
Posts: n/a
Re: Re: 97 Jeep Cherokee - No Spark
On Wed, 17 Jan 2007 16:33:29 -0800, "L.W. \(Bill\) ------ III"
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
01-17-2007, 08:14 PM
#16
Guest
Posts: n/a
Re: Re: 97 Jeep Cherokee - No Spark
On Wed, 17 Jan 2007 16:33:29 -0800, "L.W. \(Bill\) ------ III"
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
01-17-2007, 08:14 PM
#17
Guest
Posts: n/a
Re: Re: 97 Jeep Cherokee - No Spark
On Wed, 17 Jan 2007 16:33:29 -0800, "L.W. \(Bill\) ------ III"
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
<----------@***.net> wrote:
>Hi Bob,
> Ninety nine percent of the time it will be the Crankshaft Position
>Sensor. I would go ahead and replace it:
I agree, if it is bad, there wll be no spark. There is no ggod way to
check it for sure unless you have a scope to see pulses from it. As
long as coil is not open to set a code it can still be bad and still
read resestance on a test. It is its ability to send pulses that makes
it or breaks it.
-----------------
TheSnoMan.com
01-17-2007, 10:05 PM
#18
Guest
Posts: n/a
Re: 97 Jeep Cherokee - No Spark
Maybe go to Autozone and get them to read the codes with their hand held
unit. They do this for free.
Tomes
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45aebe4b$0$21615$9a6e19ea@unlimited.newshosti ng.com...
> I'll jump in too. I would recommend you get a manual for it, even a
> Cheapie Haynes gives the multimeter tests for the coil and some for the
> ignition module to see if they are still good.
>
> Maybe you can find the manual online, I know a few are...
>
> I don't know if you can retrieve codes in a 97 or not, but it is key on,
> off, on, off, on within a few seconds if it works.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> bob.turner@clix.pt wrote:
>> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
>> I have had to do is basic servicing. I have had zero faults. Last
>> weekend it would not start (no spark or fuel being injected), and a
>> friend towed me home. I have since spent several hours on the web to
>> try and find a fix. I have read all about the CPS and the cam sensor in
>> the distributor, plus checking the fuel pump etc.
>>
>> So far I have established there is fuel under pressure in the fuel rail
>> by pressing the pin on the valve, I checked all fuses and swapped
>> around the relays, and I have disconnected and reconnected the battery
>> after giving it a full charge. The earth strap from the cyl head to
>> bulkhead is in good order. I have disconnected and reconnected the CPS
>> several times.
>>
>> The instruments and warning lights are behaving as normal. i.e. The
>> warning lights come on when the ignition is switched on and then go out
>> after a few seconds. The check engine light comes on then goes off with
>> the others.
>>
>> I then ran the diagnostics by holding down the trip meter button and
>> turning on the ignition. It ran through the numbers from 000000 to
>> 999999 and then went back to 0.000. It did not come up with any faults
>> or a 55 to say the test was complete. I then tried the test with CPS
>> disconnected and still got no fault showing. Whilst indexing through
>> 000000 111111 222222 etc., all the gauges seemed to go through a
>> sequence increasing in value and then decreasing back to zero.
>>
>> So the diagnostics do not indicate a problem or even show that the
>> battery has been disconneted recently.... But I still have no spark or
>> fuel. Any ideas or suggestions. thanks in advance
>>
>> Bob Turner
>>
unit. They do this for free.
Tomes
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45aebe4b$0$21615$9a6e19ea@unlimited.newshosti ng.com...
> I'll jump in too. I would recommend you get a manual for it, even a
> Cheapie Haynes gives the multimeter tests for the coil and some for the
> ignition module to see if they are still good.
>
> Maybe you can find the manual online, I know a few are...
>
> I don't know if you can retrieve codes in a 97 or not, but it is key on,
> off, on, off, on within a few seconds if it works.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> bob.turner@clix.pt wrote:
>> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
>> I have had to do is basic servicing. I have had zero faults. Last
>> weekend it would not start (no spark or fuel being injected), and a
>> friend towed me home. I have since spent several hours on the web to
>> try and find a fix. I have read all about the CPS and the cam sensor in
>> the distributor, plus checking the fuel pump etc.
>>
>> So far I have established there is fuel under pressure in the fuel rail
>> by pressing the pin on the valve, I checked all fuses and swapped
>> around the relays, and I have disconnected and reconnected the battery
>> after giving it a full charge. The earth strap from the cyl head to
>> bulkhead is in good order. I have disconnected and reconnected the CPS
>> several times.
>>
>> The instruments and warning lights are behaving as normal. i.e. The
>> warning lights come on when the ignition is switched on and then go out
>> after a few seconds. The check engine light comes on then goes off with
>> the others.
>>
>> I then ran the diagnostics by holding down the trip meter button and
>> turning on the ignition. It ran through the numbers from 000000 to
>> 999999 and then went back to 0.000. It did not come up with any faults
>> or a 55 to say the test was complete. I then tried the test with CPS
>> disconnected and still got no fault showing. Whilst indexing through
>> 000000 111111 222222 etc., all the gauges seemed to go through a
>> sequence increasing in value and then decreasing back to zero.
>>
>> So the diagnostics do not indicate a problem or even show that the
>> battery has been disconneted recently.... But I still have no spark or
>> fuel. Any ideas or suggestions. thanks in advance
>>
>> Bob Turner
>>
01-17-2007, 10:05 PM
#19
Guest
Posts: n/a
Re: 97 Jeep Cherokee - No Spark
Maybe go to Autozone and get them to read the codes with their hand held
unit. They do this for free.
Tomes
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45aebe4b$0$21615$9a6e19ea@unlimited.newshosti ng.com...
> I'll jump in too. I would recommend you get a manual for it, even a
> Cheapie Haynes gives the multimeter tests for the coil and some for the
> ignition module to see if they are still good.
>
> Maybe you can find the manual online, I know a few are...
>
> I don't know if you can retrieve codes in a 97 or not, but it is key on,
> off, on, off, on within a few seconds if it works.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> bob.turner@clix.pt wrote:
>> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
>> I have had to do is basic servicing. I have had zero faults. Last
>> weekend it would not start (no spark or fuel being injected), and a
>> friend towed me home. I have since spent several hours on the web to
>> try and find a fix. I have read all about the CPS and the cam sensor in
>> the distributor, plus checking the fuel pump etc.
>>
>> So far I have established there is fuel under pressure in the fuel rail
>> by pressing the pin on the valve, I checked all fuses and swapped
>> around the relays, and I have disconnected and reconnected the battery
>> after giving it a full charge. The earth strap from the cyl head to
>> bulkhead is in good order. I have disconnected and reconnected the CPS
>> several times.
>>
>> The instruments and warning lights are behaving as normal. i.e. The
>> warning lights come on when the ignition is switched on and then go out
>> after a few seconds. The check engine light comes on then goes off with
>> the others.
>>
>> I then ran the diagnostics by holding down the trip meter button and
>> turning on the ignition. It ran through the numbers from 000000 to
>> 999999 and then went back to 0.000. It did not come up with any faults
>> or a 55 to say the test was complete. I then tried the test with CPS
>> disconnected and still got no fault showing. Whilst indexing through
>> 000000 111111 222222 etc., all the gauges seemed to go through a
>> sequence increasing in value and then decreasing back to zero.
>>
>> So the diagnostics do not indicate a problem or even show that the
>> battery has been disconneted recently.... But I still have no spark or
>> fuel. Any ideas or suggestions. thanks in advance
>>
>> Bob Turner
>>
unit. They do this for free.
Tomes
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45aebe4b$0$21615$9a6e19ea@unlimited.newshosti ng.com...
> I'll jump in too. I would recommend you get a manual for it, even a
> Cheapie Haynes gives the multimeter tests for the coil and some for the
> ignition module to see if they are still good.
>
> Maybe you can find the manual online, I know a few are...
>
> I don't know if you can retrieve codes in a 97 or not, but it is key on,
> off, on, off, on within a few seconds if it works.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> bob.turner@clix.pt wrote:
>> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
>> I have had to do is basic servicing. I have had zero faults. Last
>> weekend it would not start (no spark or fuel being injected), and a
>> friend towed me home. I have since spent several hours on the web to
>> try and find a fix. I have read all about the CPS and the cam sensor in
>> the distributor, plus checking the fuel pump etc.
>>
>> So far I have established there is fuel under pressure in the fuel rail
>> by pressing the pin on the valve, I checked all fuses and swapped
>> around the relays, and I have disconnected and reconnected the battery
>> after giving it a full charge. The earth strap from the cyl head to
>> bulkhead is in good order. I have disconnected and reconnected the CPS
>> several times.
>>
>> The instruments and warning lights are behaving as normal. i.e. The
>> warning lights come on when the ignition is switched on and then go out
>> after a few seconds. The check engine light comes on then goes off with
>> the others.
>>
>> I then ran the diagnostics by holding down the trip meter button and
>> turning on the ignition. It ran through the numbers from 000000 to
>> 999999 and then went back to 0.000. It did not come up with any faults
>> or a 55 to say the test was complete. I then tried the test with CPS
>> disconnected and still got no fault showing. Whilst indexing through
>> 000000 111111 222222 etc., all the gauges seemed to go through a
>> sequence increasing in value and then decreasing back to zero.
>>
>> So the diagnostics do not indicate a problem or even show that the
>> battery has been disconneted recently.... But I still have no spark or
>> fuel. Any ideas or suggestions. thanks in advance
>>
>> Bob Turner
>>
01-17-2007, 10:05 PM
#20
Guest
Posts: n/a
Re: 97 Jeep Cherokee - No Spark
Maybe go to Autozone and get them to read the codes with their hand held
unit. They do this for free.
Tomes
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45aebe4b$0$21615$9a6e19ea@unlimited.newshosti ng.com...
> I'll jump in too. I would recommend you get a manual for it, even a
> Cheapie Haynes gives the multimeter tests for the coil and some for the
> ignition module to see if they are still good.
>
> Maybe you can find the manual online, I know a few are...
>
> I don't know if you can retrieve codes in a 97 or not, but it is key on,
> off, on, off, on within a few seconds if it works.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> bob.turner@clix.pt wrote:
>> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
>> I have had to do is basic servicing. I have had zero faults. Last
>> weekend it would not start (no spark or fuel being injected), and a
>> friend towed me home. I have since spent several hours on the web to
>> try and find a fix. I have read all about the CPS and the cam sensor in
>> the distributor, plus checking the fuel pump etc.
>>
>> So far I have established there is fuel under pressure in the fuel rail
>> by pressing the pin on the valve, I checked all fuses and swapped
>> around the relays, and I have disconnected and reconnected the battery
>> after giving it a full charge. The earth strap from the cyl head to
>> bulkhead is in good order. I have disconnected and reconnected the CPS
>> several times.
>>
>> The instruments and warning lights are behaving as normal. i.e. The
>> warning lights come on when the ignition is switched on and then go out
>> after a few seconds. The check engine light comes on then goes off with
>> the others.
>>
>> I then ran the diagnostics by holding down the trip meter button and
>> turning on the ignition. It ran through the numbers from 000000 to
>> 999999 and then went back to 0.000. It did not come up with any faults
>> or a 55 to say the test was complete. I then tried the test with CPS
>> disconnected and still got no fault showing. Whilst indexing through
>> 000000 111111 222222 etc., all the gauges seemed to go through a
>> sequence increasing in value and then decreasing back to zero.
>>
>> So the diagnostics do not indicate a problem or even show that the
>> battery has been disconneted recently.... But I still have no spark or
>> fuel. Any ideas or suggestions. thanks in advance
>>
>> Bob Turner
>>
unit. They do this for free.
Tomes
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45aebe4b$0$21615$9a6e19ea@unlimited.newshosti ng.com...
> I'll jump in too. I would recommend you get a manual for it, even a
> Cheapie Haynes gives the multimeter tests for the coil and some for the
> ignition module to see if they are still good.
>
> Maybe you can find the manual online, I know a few are...
>
> I don't know if you can retrieve codes in a 97 or not, but it is key on,
> off, on, off, on within a few seconds if it works.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> bob.turner@clix.pt wrote:
>> I have a 97 cherokee 4.0L Auto, with just 68K miles. In three years all
>> I have had to do is basic servicing. I have had zero faults. Last
>> weekend it would not start (no spark or fuel being injected), and a
>> friend towed me home. I have since spent several hours on the web to
>> try and find a fix. I have read all about the CPS and the cam sensor in
>> the distributor, plus checking the fuel pump etc.
>>
>> So far I have established there is fuel under pressure in the fuel rail
>> by pressing the pin on the valve, I checked all fuses and swapped
>> around the relays, and I have disconnected and reconnected the battery
>> after giving it a full charge. The earth strap from the cyl head to
>> bulkhead is in good order. I have disconnected and reconnected the CPS
>> several times.
>>
>> The instruments and warning lights are behaving as normal. i.e. The
>> warning lights come on when the ignition is switched on and then go out
>> after a few seconds. The check engine light comes on then goes off with
>> the others.
>>
>> I then ran the diagnostics by holding down the trip meter button and
>> turning on the ignition. It ran through the numbers from 000000 to
>> 999999 and then went back to 0.000. It did not come up with any faults
>> or a 55 to say the test was complete. I then tried the test with CPS
>> disconnected and still got no fault showing. Whilst indexing through
>> 000000 111111 222222 etc., all the gauges seemed to go through a
>> sequence increasing in value and then decreasing back to zero.
>>
>> So the diagnostics do not indicate a problem or even show that the
>> battery has been disconneted recently.... But I still have no spark or
>> fuel. Any ideas or suggestions. thanks in advance
>>
>> Bob Turner
>>
