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Old 06-09-2006, 04:52 PM   #11
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My gut is telling me that there is another issue somewhere... But I can't be there to look at it...

If you have an MAF that may be a possibility... It almost seems as if the PCM has bit the dust... That car is running full out rich...

Sounds like there are more tests that need to be done, ranging from the injectors, to various emission control items like the EGR...

Running that bad and having no codes leads me to think the PCM is not happy... But it is still possible that the ICM could be bad ...

How many miles on the car?

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Old 06-09-2006, 05:03 PM   #12
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Just over 130,000 miles on it. I am going to go out and see if I can clean the MAF, was thinking about taking the EGR off and inspecting it, but according to the mechanic he said he was able to open and close the EGR not to say that it means it is working properly.
I know what the ICM is, but what is the PCM? Is that the main computer?
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Old 06-09-2006, 05:04 PM   #13
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PCM - Powertrain control module. It'* the main one.
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Old 06-09-2006, 05:10 PM   #14
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When I read this I thought that I would check the injectors out. You specifically mention #6 plug being fouled with soot, but not the other plugs. Is that correct? If so, it almost sounds like a stuck/bad injector.

Have you ever had a full injector cleaning done?

Also, the whole "SES light but no codes" thing has me perplexed. I would be interested in knowing what scan tool your mechanic uses. Other than a bad SES light circuit, I don't know of a way that you can get a light without any code or pending code.
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Old 06-09-2006, 06:23 PM   #15
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When I called the mechanic back to schedule a appt on, I told him everything I had done and he said something about the injectors cause the only fault it read was misfire on 2 cylinders. I will be getting a full injector cleaning on monday regardless if I(more like you guys) get this figured out. While I was cleaning the MAF and checking connections I noticed another O2 sensor just after the manifold, didnt know I had 2, I had only replaced the one after the catalytic convertor. I am sure the one before the cat is probably the more important one. Other then maybe getting the front O2 sensor I think I am done at this point, unless there is anyting else you guys can think of that I might check or clean.
One final question, even though the mechanic is trusted and a family friend with an updated shop, can they tell if a PCM, ICM, etc... is bad without going the trial and error route? Becasue I can do that.

Just wanted to say thanks for all the feedback, you guys have been great!!! Makes me wonder what life would be like without a place like this. I just hope someday I can return the favor back to this club.
I will definately let you all know what the problem was when It is fixed. Ive seen a lot of posts here with problems like mine, but seems people forget to post what eventually fixed the problem.
Thanks again for everything!!!!
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Old 06-09-2006, 06:38 PM   #16
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Oh yes, The one before the cat is the most important. The one after only just detects what is coming out of the cat.
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Old 06-09-2006, 06:41 PM   #17
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Well I don't know about the 3.1 PCM'* but I believe that the PCM'* in the L36 have a problem with injector drivers. If it'* fouled on #6, try swapping the #6 injector with the #4. If the fouling follows the injector, you need to clean it or get a new one. If it stays on #6, you would possibly have a bad injector driver. The front o2 reads the exhaust to help keep air fuel ration in check, the rear o2 sensor checks to make sure the cat is working. Mind you, I am not familiar with the 3100, but that'* a place to start I think.
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Old 06-10-2006, 08:27 AM   #18
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I agree with BlackBird. But I would do this first before swapping: Find yourself a little light bulb and connect it to #6 fuel injector plug. Start the car...does the light flicker? If it does, your driver is good (along with the connector itself). Does the car run the same as before, even with the FInj. disabled? Now, with the vehicle off, take a 9V battery and touch the leads to the fuel injector itself. Can you make out a click every time you touch the leads to it?

You can also find yourself a long screwdriver, and with the car running (with all 6 injectors), put the tip end on the injector itself, and your ear on the other end. You should be able to distinctly hear the "click click click" noise comming from the injector if it is running right.
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Old 06-10-2006, 08:31 PM   #19
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I don't think you can have a check engine light without having a code stored. Try haveing Autozone or Advance auto check for codes.

Also with that much smoke coming out I'd definitely do a Fuel Pressure check in addition to checking that one injector. It sounds like its running rich to me so it could be a stuck open injector or bad fuel pressure regulator.
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Old 06-11-2006, 12:03 PM   #20
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The bad thing here is that the PCM should see an injector circuit fault and throw a code if there are injector issues... Such as a sticking or dead injector...

I think for this it would be a code P0200

At the same time the PCM should have noted the cylinder missfire... I believe that you had 2 missfires...

You may want to pull and check the suspect injector... And like it has been mentioned swap with another and see if the problem follows the injector...

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