Just found this problem, engine light on showed a misfire. Had shop
double check all of the injectors and fuel pressure, all good. Install

a new fuel filter. Then did a new plugs. Thought it might be a spark
plug wire, installed a know good one, no fix. Then swapped with the
one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
no fix.
Thought this could be related to the plenum problem noted here, not the
issue, the engine is not using any anti-freeze.
Tonight, I listened to all of the fuel injectors, all sound good.

Can a timing chain cause this kind of issue? It has never been
replaced on this car and it has 165k miles on it. However, why just #4
misfire. Overall, the engine runs great at highter speeds, only
misfires at idle.

Not the chain, do a compression test first, check for vacuum leaks, switch
injectors see if the miss moves.
<tpetaja@gmail.com> wrote in message
news:1155012288.758719.296030@n13g2000cwa.googlegr oups.com...
> Just found this problem, engine light on showed a misfire. Had shop
> double check all of the injectors and fuel pressure, all good. Install
>
> a new fuel filter. Then did a new plugs. Thought it might be a spark
> plug wire, installed a know good one, no fix. Then swapped with the
> one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> no fix.
> Thought this could be related to the plenum problem noted here, not the
> issue, the engine is not using any anti-freeze.
> Tonight, I listened to all of the fuel injectors, all sound good.
>
> Can a timing chain cause this kind of issue? It has never been
> replaced on this car and it has 165k miles on it. However, why just #4
> misfire. Overall, the engine runs great at highter speeds, only
> misfires at idle.
>



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Should the timing chain be replaced maybe the better question. I did
not thing it could case this problem, but I was wondering about the
life.
Shep wrote:
> Not the chain, do a compression test first, check for vacuum leaks, switch
> injectors see if the miss moves.
> <tpetaja@gmail.com> wrote in message
> news:1155012288.758719.296030@n13g2000cwa.googlegr oups.com...
> > Just found this problem, engine light on showed a misfire. Had shop
> > double check all of the injectors and fuel pressure, all good. Install
> >
> > a new fuel filter. Then did a new plugs. Thought it might be a spark
> > plug wire, installed a know good one, no fix. Then swapped with the
> > one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> > no fix.
> > Thought this could be related to the plenum problem noted here, not the
> > issue, the engine is not using any anti-freeze.
> > Tonight, I listened to all of the fuel injectors, all sound good.
> >
> > Can a timing chain cause this kind of issue? It has never been
> > replaced on this car and it has 165k miles on it. However, why just #4
> > misfire. Overall, the engine runs great at highter speeds, only
> > misfires at idle.
> >
>
>
>
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tpetaja@gmail.com wrote in news:1155012288.758719.296030
@n13g2000cwa.googlegroups.com:

> Just found this problem, engine light on showed a misfire. Had shop
> double check all of the injectors and fuel pressure, all good. Install
>
> a new fuel filter. Then did a new plugs. Thought it might be a spark
> plug wire, installed a know good one, no fix. Then swapped with the
> one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> no fix.
> Thought this could be related to the plenum problem noted here, not the
> issue, the engine is not using any anti-freeze.
> Tonight, I listened to all of the fuel injectors, all sound good.
>
> Can a timing chain cause this kind of issue? It has never been
> replaced on this car and it has 165k miles on it. However, why just #4
> misfire. Overall, the engine runs great at highter speeds, only
> misfires at idle.
>

The Mass Airflow Sensor(MAF) is dirty or needs to be replaced. If it's the
3,8, it screws in above the PCV valve. Check & replace that too.

The map sensor is above the pcv!!, the maf is in the air intake duct, be
careful with your advice.
"JJ" <JJ99@bogus.INVALID.com> wrote in message
news:A4dCg.11407$rd1.9097@trnddc01...
> tpetaja@gmail.com wrote in news:1155012288.758719.296030
> @n13g2000cwa.googlegroups.com:
>
>> Just found this problem, engine light on showed a misfire. Had shop
>> double check all of the injectors and fuel pressure, all good. Install
>>
>> a new fuel filter. Then did a new plugs. Thought it might be a spark
>> plug wire, installed a know good one, no fix. Then swapped with the
>> one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
>> no fix.
>> Thought this could be related to the plenum problem noted here, not the
>> issue, the engine is not using any anti-freeze.
>> Tonight, I listened to all of the fuel injectors, all sound good.
>>
>> Can a timing chain cause this kind of issue? It has never been
>> replaced on this car and it has 165k miles on it. However, why just #4
>> misfire. Overall, the engine runs great at highter speeds, only
>> misfires at idle.
>>
>
> The Mass Airflow Sensor(MAF) is dirty or needs to be replaced. If it's the
> 3,8, it screws in above the PCV valve. Check & replace that too.



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tpetaja@gmail.com wrote:
> Just found this problem, engine light on showed a misfire. Had shop
> double check all of the injectors and fuel pressure, all good. Install
>
> a new fuel filter. Then did a new plugs. Thought it might be a spark
> plug wire, installed a know good one, no fix. Then swapped with the
> one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> no fix.
> Thought this could be related to the plenum problem noted here, not the
> issue, the engine is not using any anti-freeze.
> Tonight, I listened to all of the fuel injectors, all sound good.
>
> Can a timing chain cause this kind of issue? It has never been
> replaced on this car and it has 165k miles on it. However, why just #4
> misfire. Overall, the engine runs great at highter speeds, only
> misfires at idle.

tpetaja@gmail.com wrote:
> Just found this problem, engine light on showed a misfire. Had shop
> double check all of the injectors and fuel pressure, all good. Install
>
> a new fuel filter. Then did a new plugs. Thought it might be a spark
> plug wire, installed a know good one, no fix. Then swapped with the
> one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> no fix.
> Thought this could be related to the plenum problem noted here, not the
> issue, the engine is not using any anti-freeze.
> Tonight, I listened to all of the fuel injectors, all sound good.
>
> Can a timing chain cause this kind of issue? It has never been
> replaced on this car and it has 165k miles on it. However, why just #4
> misfire. Overall, the engine runs great at highter speeds, only
> misfires at idle.

if the exhaust stinks like sulfur then you are getting fuel but no
spark and the catalytic converter is trying to burn all the excess fuel
in the exhaust stream ......if this goes on for too long you will burn
up the converter and possibly cause a restricted exhaust making the car
sluggish or if the exhaust smell gassy like a beat up old pick up truck
the converter is already burned up ...if the exhaust smell normal, then
you are not getting any or enough fuel to that cylinder. try
this...... your car has three coils one coil for each pair of mated
cylinders...2 and 5....6 and 3....1 and 4. try removing the wires
from 2and 5 only at the coil.DON'T MIX UP THE WIRE LOCATION...have
someone try to start the car while you watch the coil . you should
see a sharp blue spark jump from one tower to the next. if you do, put
the wires back on hte 2 and 5 coil and move on to the 6 and 3 coil
.... do the same thing remove the wires from the 6 and 3 coil and have
someone try to start the car ...you should seee the same sharp blue
spark. if you do , put the wires back on the 6 and 3 coil and move
on to the 1 coil and 4 do the same thing and look for a sharp blue
spark ...if you dont; see a sharp blue spark at the coil tower then you
have a bad coil or ignition module .....as long as you dont; mix up the
wires you can move a coil you think might be bad to another location on
the ignition module .....like if you think the 2 and 5 coil is bad
you can move it to the 6 and 3 location as a double check ..if don;t
see a spark with the coil in a new location the coil is bad . if you do
see a spark at the new location you have a bad ignition module ...
......as long as the wires stay in the same order as they did when you
started ...... the coil locations are interchangable they are numbered
only from the factory for convenience however the sparkplug wire
locations cannot be moved . try that first ..if all check good you may
have a bad injector and if you have not replaced one before take it to
a shop .....i know a guy who set his car on fire because he nicked an
injector o-ring . let me know ..

steve_f wrote:
> tpetaja@gmail.com wrote:
> > Just found this problem, engine light on showed a misfire. Had shop
> > double check all of the injectors and fuel pressure, all good. Install
> >
> > a new fuel filter. Then did a new plugs. Thought it might be a spark
> > plug wire, installed a know good one, no fix. Then swapped with the
> > one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> > no fix.
> > Thought this could be related to the plenum problem noted here, not the
> > issue, the engine is not using any anti-freeze.
> > Tonight, I listened to all of the fuel injectors, all sound good.
> >
> > Can a timing chain cause this kind of issue? It has never been
> > replaced on this car and it has 165k miles on it. However, why just #4
> > misfire. Overall, the engine runs great at highter speeds, only
> > misfires at idle.

is this the 3100 eng

sounds like timing to me.What do you think group.

--
Todd A. Delk
<tpetaja@gmail.com> wrote in message
news:1155012288.758719.296030@n13g2000cwa.googlegr oups.com...
> Just found this problem, engine light on showed a misfire. Had shop
> double check all of the injectors and fuel pressure, all good. Install
>
> a new fuel filter. Then did a new plugs. Thought it might be a spark
> plug wire, installed a know good one, no fix. Then swapped with the
> one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> no fix.
> Thought this could be related to the plenum problem noted here, not the
> issue, the engine is not using any anti-freeze.
> Tonight, I listened to all of the fuel injectors, all sound good.
>
> Can a timing chain cause this kind of issue? It has never been
> replaced on this car and it has 165k miles on it. However, why just #4
> misfire. Overall, the engine runs great at highter speeds, only
> misfires at idle.
>

No, it is a 3.8
steve_f wrote:
> steve_f wrote:
> > tpetaja@gmail.com wrote:
> > > Just found this problem, engine light on showed a misfire. Had shop
> > > double check all of the injectors and fuel pressure, all good. Install
> > >
> > > a new fuel filter. Then did a new plugs. Thought it might be a spark
> > > plug wire, installed a know good one, no fix. Then swapped with the
> > > one next to it, still no fix. Replace coil, no fix. Replaced the ICM,
> > > no fix.
> > > Thought this could be related to the plenum problem noted here, not the
> > > issue, the engine is not using any anti-freeze.
> > > Tonight, I listened to all of the fuel injectors, all sound good.
> > >
> > > Can a timing chain cause this kind of issue? It has never been
> > > replaced on this car and it has 165k miles on it. However, why just #4
> > > misfire. Overall, the engine runs great at highter speeds, only
> > > misfires at idle.
>
> is this the 3100 eng