Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

Aw shucks, I don't even know if your engine/year allows for timing
adjustment. If not, well then one less option.

Jon

Jon wrote:
> Jim,
>
> Excess NOx is a sign of too much heat during combustion process (well,
> for emissions purposes anyway). I don't know how picky your local test
> only shop is, but retarding your timing a few degrees is the easiest
> and fastest way to get around that problem. It's worked for me for
> years in other states running the same smog test. Hm, for that matter,
> make sure your timing is set properly to begin with.
>
> I agree with Earle, a failing EGR system will fail your NOx too. On a
> 14 year old vehicle with as little mileage as you have on it, I'd
> carefully check the passages for obstruction.
>
> Assuming the cat's numbers were the same before and after replacment,
> it's doing its job to the best of its ability, so take that out of the
> equation.
>
> Jon
>
>
> Earle Horton wrote:
> > If they really did replace your catalytic converter last time, then theEGR,
> > if you have one in that vehicle, is indeed a likely suspect.
> >
> > Earle
> >
> > <kaigoneq@yahoo.com> wrote in message
> > news:1169335152.479033.120370@a75g2000cwd.googlegr oups.com...
> >
> > I only went to the test-only station. The tech there said the other
> > repair shop did not repair anything that would fix this except a new
> > cat will normally get this to pass.
> >
> > I've applied for the CA assitance for test-only vehicles. So I have to
> > wait to take it in.
> >
> > I've been reading online and it very well could be my EGR valve is
> > stuck or broken.
> >
> > Jim.
> >
> > The Merg wrote:
> > > Even though the standard schedule for maintenance applies to mileage,it
> > > really should be viewed as a mileage or time period, whichever comes
> > first.
> > > What did they tell you to fix when it failed this time? Same things?
> > >
> > > kaigoneq@yahoo.com wrote:
> > > > About 2000. It really is a third car.
> > > >
> > > > Jim.
> > > >
> > > >
> > > > The Merg wrote:
> > > >> Only 57k total on a '93? Wow. How many of those miles are in thelast
> > > >> two years?
> > > >>
> > > >> kaigoneq@yahoo.com wrote:
> > > >>> My Jeep Wrangler failed the smog check (for CA) again this year.
> > > >>>
> > > >>> Two years ago it failed with NO of over 1000 (at Test Only) and the
> > max
> > > >>> is 517. The repair shop said I needed to fix X things: new radiator,
> > > >>> new pump, new cat converter, etc. I paid almost $1100 and it was still
> > > >>> failing. Some how after I complained a bunch they got it to pass.Now
> > > >>> it fails with the same 1000 number and I barely drove the car forthe
> > > >>> two years.
> > > >>>
> > > >>> How do I get the NO down?
> > > >>> I did not:
> > > >>> change plugs, oil, filters, etc.
> > > >>> run the car to heat up the cat since the repair shop said theylet
> > > >>> the car go on the machine cold to get it to pass.
> > > >>>
> > > >>> I applied to CA test-only repair service, they are supposed to send me
> > > >>> to a responsible place to have my car looked at. I feel I really got
> > > >>> taken two years ago and maybe someone fooled the machine.
> > > >>>
> > > >>> Thanks for any help.
> > > >>>
> > > >>> Jim.
> > > >>>
> > > >> --
> > > >> ÐÏࡱá
> > > >
> > >
> > > --
> > > ÐÏࡱá

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

Aw shucks, I don't even know if your engine/year allows for timing
adjustment. If not, well then one less option.

Jon

Jon wrote:
> Jim,
>
> Excess NOx is a sign of too much heat during combustion process (well,
> for emissions purposes anyway). I don't know how picky your local test
> only shop is, but retarding your timing a few degrees is the easiest
> and fastest way to get around that problem. It's worked for me for
> years in other states running the same smog test. Hm, for that matter,
> make sure your timing is set properly to begin with.
>
> I agree with Earle, a failing EGR system will fail your NOx too. On a
> 14 year old vehicle with as little mileage as you have on it, I'd
> carefully check the passages for obstruction.
>
> Assuming the cat's numbers were the same before and after replacment,
> it's doing its job to the best of its ability, so take that out of the
> equation.
>
> Jon
>
>
> Earle Horton wrote:
> > If they really did replace your catalytic converter last time, then theEGR,
> > if you have one in that vehicle, is indeed a likely suspect.
> >
> > Earle
> >
> > <kaigoneq@yahoo.com> wrote in message
> > news:1169335152.479033.120370@a75g2000cwd.googlegr oups.com...
> >
> > I only went to the test-only station. The tech there said the other
> > repair shop did not repair anything that would fix this except a new
> > cat will normally get this to pass.
> >
> > I've applied for the CA assitance for test-only vehicles. So I have to
> > wait to take it in.
> >
> > I've been reading online and it very well could be my EGR valve is
> > stuck or broken.
> >
> > Jim.
> >
> > The Merg wrote:
> > > Even though the standard schedule for maintenance applies to mileage,it
> > > really should be viewed as a mileage or time period, whichever comes
> > first.
> > > What did they tell you to fix when it failed this time? Same things?
> > >
> > > kaigoneq@yahoo.com wrote:
> > > > About 2000. It really is a third car.
> > > >
> > > > Jim.
> > > >
> > > >
> > > > The Merg wrote:
> > > >> Only 57k total on a '93? Wow. How many of those miles are in thelast
> > > >> two years?
> > > >>
> > > >> kaigoneq@yahoo.com wrote:
> > > >>> My Jeep Wrangler failed the smog check (for CA) again this year.
> > > >>>
> > > >>> Two years ago it failed with NO of over 1000 (at Test Only) and the
> > max
> > > >>> is 517. The repair shop said I needed to fix X things: new radiator,
> > > >>> new pump, new cat converter, etc. I paid almost $1100 and it was still
> > > >>> failing. Some how after I complained a bunch they got it to pass.Now
> > > >>> it fails with the same 1000 number and I barely drove the car forthe
> > > >>> two years.
> > > >>>
> > > >>> How do I get the NO down?
> > > >>> I did not:
> > > >>> change plugs, oil, filters, etc.
> > > >>> run the car to heat up the cat since the repair shop said theylet
> > > >>> the car go on the machine cold to get it to pass.
> > > >>>
> > > >>> I applied to CA test-only repair service, they are supposed to send me
> > > >>> to a responsible place to have my car looked at. I feel I really got
> > > >>> taken two years ago and maybe someone fooled the machine.
> > > >>>
> > > >>> Thanks for any help.
> > > >>>
> > > >>> Jim.
> > > >>>
> > > >> --
> > > >> ÐÏࡱá
> > > >
> > >
> > > --
> > > ÐÏࡱá

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

Aw shucks, I don't even know if your engine/year allows for timing
adjustment. If not, well then one less option.

Jon

Jon wrote:
> Jim,
>
> Excess NOx is a sign of too much heat during combustion process (well,
> for emissions purposes anyway). I don't know how picky your local test
> only shop is, but retarding your timing a few degrees is the easiest
> and fastest way to get around that problem. It's worked for me for
> years in other states running the same smog test. Hm, for that matter,
> make sure your timing is set properly to begin with.
>
> I agree with Earle, a failing EGR system will fail your NOx too. On a
> 14 year old vehicle with as little mileage as you have on it, I'd
> carefully check the passages for obstruction.
>
> Assuming the cat's numbers were the same before and after replacment,
> it's doing its job to the best of its ability, so take that out of the
> equation.
>
> Jon
>
>
> Earle Horton wrote:
> > If they really did replace your catalytic converter last time, then theEGR,
> > if you have one in that vehicle, is indeed a likely suspect.
> >
> > Earle
> >
> > <kaigoneq@yahoo.com> wrote in message
> > news:1169335152.479033.120370@a75g2000cwd.googlegr oups.com...
> >
> > I only went to the test-only station. The tech there said the other
> > repair shop did not repair anything that would fix this except a new
> > cat will normally get this to pass.
> >
> > I've applied for the CA assitance for test-only vehicles. So I have to
> > wait to take it in.
> >
> > I've been reading online and it very well could be my EGR valve is
> > stuck or broken.
> >
> > Jim.
> >
> > The Merg wrote:
> > > Even though the standard schedule for maintenance applies to mileage,it
> > > really should be viewed as a mileage or time period, whichever comes
> > first.
> > > What did they tell you to fix when it failed this time? Same things?
> > >
> > > kaigoneq@yahoo.com wrote:
> > > > About 2000. It really is a third car.
> > > >
> > > > Jim.
> > > >
> > > >
> > > > The Merg wrote:
> > > >> Only 57k total on a '93? Wow. How many of those miles are in thelast
> > > >> two years?
> > > >>
> > > >> kaigoneq@yahoo.com wrote:
> > > >>> My Jeep Wrangler failed the smog check (for CA) again this year.
> > > >>>
> > > >>> Two years ago it failed with NO of over 1000 (at Test Only) and the
> > max
> > > >>> is 517. The repair shop said I needed to fix X things: new radiator,
> > > >>> new pump, new cat converter, etc. I paid almost $1100 and it was still
> > > >>> failing. Some how after I complained a bunch they got it to pass.Now
> > > >>> it fails with the same 1000 number and I barely drove the car forthe
> > > >>> two years.
> > > >>>
> > > >>> How do I get the NO down?
> > > >>> I did not:
> > > >>> change plugs, oil, filters, etc.
> > > >>> run the car to heat up the cat since the repair shop said theylet
> > > >>> the car go on the machine cold to get it to pass.
> > > >>>
> > > >>> I applied to CA test-only repair service, they are supposed to send me
> > > >>> to a responsible place to have my car looked at. I feel I really got
> > > >>> taken two years ago and maybe someone fooled the machine.
> > > >>>
> > > >>> Thanks for any help.
> > > >>>
> > > >>> Jim.
> > > >>>
> > > >> --
> > > >> ÐÏࡱá
> > > >
> > >
> > > --
> > > ÐÏࡱá

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

High NO usually indicates a problem with the EGR valve, plugged EGR
passages or a leak in the EGR vacuum circuit. I had the same problem
with another vehicle last year, and a replacement EGR valve solved the
problem.

Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
OEM part regardless of cost. I learned this lesson the hard way.

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

High NO usually indicates a problem with the EGR valve, plugged EGR
passages or a leak in the EGR vacuum circuit. I had the same problem
with another vehicle last year, and a replacement EGR valve solved the
problem.

Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
OEM part regardless of cost. I learned this lesson the hard way.

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

High NO usually indicates a problem with the EGR valve, plugged EGR
passages or a leak in the EGR vacuum circuit. I had the same problem
with another vehicle last year, and a replacement EGR valve solved the
problem.

Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
OEM part regardless of cost. I learned this lesson the hard way.

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

High NO usually indicates a problem with the EGR valve, plugged EGR
passages or a leak in the EGR vacuum circuit. I had the same problem
with another vehicle last year, and a replacement EGR valve solved the
problem.

Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
OEM part regardless of cost. I learned this lesson the hard way.

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

Thanks for the responses.
Yeh, it seemed like the EGR. So I started checking for replacement EGRs
for my Jeep.
Cannot find any at any site.
I have a service manual and so I looked up EGR.
Jeep removed the EGR from the wranglers in 1990. So my 1993 does not
have one.
It might be regulated by the computer. Maybe the hose is plugged or
something.

Jim.


Outatime wrote:
> High NO usually indicates a problem with the EGR valve, plugged EGR
> passages or a leak in the EGR vacuum circuit. I had the same problem
> with another vehicle last year, and a replacement EGR valve solved the
> problem.
>
> Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
> OEM part regardless of cost. I learned this lesson the hard way.

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

Thanks for the responses.
Yeh, it seemed like the EGR. So I started checking for replacement EGRs
for my Jeep.
Cannot find any at any site.
I have a service manual and so I looked up EGR.
Jeep removed the EGR from the wranglers in 1990. So my 1993 does not
have one.
It might be regulated by the computer. Maybe the hose is plugged or
something.

Jim.


Outatime wrote:
> High NO usually indicates a problem with the EGR valve, plugged EGR
> passages or a leak in the EGR vacuum circuit. I had the same problem
> with another vehicle last year, and a replacement EGR valve solved the
> problem.
>
> Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
> OEM part regardless of cost. I learned this lesson the hard way.

Re: 93 Jeep Wrangler - 57K miles - fails CA smog
 

Thanks for the responses.
Yeh, it seemed like the EGR. So I started checking for replacement EGRs
for my Jeep.
Cannot find any at any site.
I have a service manual and so I looked up EGR.
Jeep removed the EGR from the wranglers in 1990. So my 1993 does not
have one.
It might be regulated by the computer. Maybe the hose is plugged or
something.

Jim.


Outatime wrote:
> High NO usually indicates a problem with the EGR valve, plugged EGR
> passages or a leak in the EGR vacuum circuit. I had the same problem
> with another vehicle last year, and a replacement EGR valve solved the
> problem.
>
> Warning: don't buy an aftermarket EGR valve --they're junk. Go with an
> OEM part regardless of cost. I learned this lesson the hard way.