Thread: so frustrated with this car

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  1. #41 Re: so frustrated with this car 
    GTP Level Member Rico's Avatar
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    Quote Originally Posted by 99pgpgt View Post
    yeah its 125 at my work (advance)...and rico...you said random :P
    Yea, but I was trying to be a jerk. There is no such code.

    I hope it is an easy fix. Without the tools sometimes it's so hard to diagnose these.
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  2. #42 Re: so frustrated with this car 
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    ok they will test it at autozone i have tools. how do they test it
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  3. #43 Re: so frustrated with this car 
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    I took the ICM off and between the bottom and the metal plate its pretty corroid i dont know if that matters or not but im going down to autozone tomarrow and get it tested let ya guys know how i make out Thanks for all your help so far
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  4. #44 Re: so frustrated with this car 
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    Ok i took the ICM down to autozone and they hooked it up to a machine and they said it was good, so im stuck in tha same spot i was now, i dont know what else it could be? has anyone ever used that machine befor bc i asked the guy if i could go over and watch and he said no didnt seem like he hooked it up right is there another way to test?
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  5. #45 Re: so frustrated with this car 
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    You said "theres spark coming from the coil both sides." If so, then your problem at cyl #3 isn't spark. Next thing you wanna do is see if the injector is getting pulse. If you're getting pulse and spark, then you most likely have a compression-ish issue or the injector is flaking out.

    So lets make sure that you have spark and pulse.
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  6. #46 Re: so frustrated with this car 
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    A friend of mine has a 99 regal with the 3800 and he had the same problem, tried switching the injectors, had the ICM tested and replaced all plugs and wires, he ended up having to purchase a new computer for his car. As far as i know he hasnt had any other problems since, could be an option.
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  7. #47 Re: so frustrated with this car 
    SE Level Member 1999GrandPrix's Avatar
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    hmmm icm can b checked by advance auto. just go by with ur icm and they can test it. its under the coils. take coils off and unplug the harness going to it. should come off . sorry i meant duralast wires but ur prolly right bluegtp. had to re route the wires when tune up. but upon bringing wires back to autozone, they replaced it 100% and it still hesitiated. so i went with denso brand and not a problem. so... i donno to each is own.
    1999 GT

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  8. #48 Re: so frustrated with this car 
    The Blue One blueguy's Avatar
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    Quote Originally Posted by 1999GrandPrix View Post
    hmmm icm can b checked by advance auto. just go by with ur icm and they can test it. its under the coils. take coils off and unplug the harness going to it. should come off . sorry i meant duralast wires but ur prolly right bluegtp. had to re route the wires when tune up. but upon bringing wires back to autozone, they replaced it 100% and it still hesitiated. so i went with denso brand and not a problem. so... i donno to each is own.

    Two and a half hours earlier...


    Quote Originally Posted by kawasakidrivinghick View Post
    Ok i took the ICM down to autozone and they hooked it up to a machine and they said it was good, so im stuck in tha same spot i was now, i dont know what else it could be? has anyone ever used that machine befor bc i asked the guy if i could go over and watch and he said no didnt seem like he hooked it up right is there another way to test?
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  9. #49 Re: so frustrated with this car 
    I live here. MoarkatsINmuhtrailer's Avatar
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    its impossible to hook the icm up wrong...there is only one plug on the machines we use. you press start and tap the icm with a metal piece to simulate driving conditions. i always run the test 3 times to make sure. if it fails even one time i suggest replacing it
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  10. #50 Re: so frustrated with this car 
    GTP Level Member Rico's Avatar
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    Quote Originally Posted by rocknnachos View Post
    You said "theres spark coming from the coil both sides." If so, then your problem at cyl #3 isn't spark. Next thing you wanna do is see if the injector is getting pulse. If you're getting pulse and spark, then you most likely have a compression-ish issue or the injector is flaking out.

    So lets make sure that you have spark and pulse.
    Follow this guys lead. He knows what he's talking about.

    The injector signal can be tested with a DVM set on "Duty Cycle". This is an easy way to measure pulse width. Take note of the stability of the signal. Get a reading from one of the other known good injectors and compare it to the reading from #3.

    If the injector signal is good then the PCM is probably good. Move on to a compression test. If the compression test is good then I would probably replace the ICM or install it on one or your freind's cars and see if their car produces the P0303.
    Last edited by Rico; 03-14-2012 at 01:38 AM.
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  11. #51 Re: so frustrated with this car 
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    well i switched plugs and wires swtched 3 and 5 had it scanned and it didnt change from cylinder 3 so i put a bottle of injector cleaner in it and a cup of mystery oil and cleared light. the light hasnt come back on yet! but the exhaust has a pretty big leak right after cat so maybe the leak is causeing a little ruff idle.
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  12. #52 Re: so frustrated with this car 
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    plus im gonna do compression test on it tomarrow what should the compression be?
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  13. #53 Re: so frustrated with this car 
    Turbo is the way to go. BillBoost37's Avatar
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    In my experience compression tests don't tell you the whole story. Heck, most of the time they are done wrong and they tell a bad story about something that is fine. If you smell gas in the oil, do a compression test. If you smell gas in the exhaust, check injectors.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  14. #54 Re: so frustrated with this car 
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    I had a mechanic do compression Test and he said #3 cylinder had 60 PSI and the other ones had 170 so he told me i would have to take the head off and have it looked at. the car runs fine driving and it went almost 20 miles and the check engine light didnt flash or come on, then idling it came on, anyone else have a idea for me or am i screwed thanks
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  15. #55 Re: so frustrated with this car 
    Donating Users 16MustangVet's Avatar
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    If you say it runs fine driving and then idles like crap I have no idea how it could have a compression problem. If your still getting misfire codes I still think its ignition problem.
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  16. #56 Re: so frustrated with this car 
    GTP Level Member Rico's Avatar
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    Quote Originally Posted by Rico View Post
    An electrode missing from a spark plug makes me worry...hope you didn't toast a valve, or worse.
    You may need to take that car to a professional.
    The most important clue was the damaged spark plug.
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  17. #57 Re: so frustrated with this car 
    GTP Level Member Rico's Avatar
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    Quote Originally Posted by 98GrandPrixIraqVet View Post
    toast a valve or something geezus christ people dont you read the thread !? it runs fine except at idle!
    Cmon this cant be that hard I still say its ICM or at the very least ignition system related its throwing a misfire code lol why would the code lie to you!
    I did read the entire thread and that's why I suggested that there may be a problem with compression.
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  18. #58 Re: so frustrated with this car 
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    So what you guys think would it cause a misfire code with a bad valve it runs great besides idle so would this do this with a bad valve
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  19. #59 Re: so frustrated with this car 
    GTP Level Member Rico's Avatar
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    Quote Originally Posted by kawasakidrivinghick View Post
    I had a mechanic do compression Test and he said #3 cylinder had 60 PSI and the other ones had 170 so he told me i would have to take the head off and have it looked at. the car runs fine driving and it went almost 20 miles and the check engine light didnt flash or come on, then idling it came on, anyone else have a idea for me or am i screwed thanks
    You may have ball-peened a seat. Do you have the ability to remove the head yourself? It's easy, especially with our remedial valve train. Just make sure all parts go back on in the same place. If it is the head I would just go and get one from a yard. They're dirt cheap. The other option would be to have a machine shop do the work for you. That's if it's salvagable.
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  20. #60 Re: so frustrated with this car 
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    ok what you mean ball-peened a seat?
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