Thread: Tried everything for this misfire

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  1. #21 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Yea I really did try the kitchen sink haha and thanks Tonkin, but imma just go to the junkyard this weekend. I'm out like $300 and still havnt fixed it lol
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  2. #22 Re: Tried everything for this misfire 
    GTP Level Member Silver2kgtp's Avatar
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    You should try a new ICM. Also make sure grounding loop for ICM harness is solid.

    Could also try a new PCM. If it's reprogrammed just need to upload your current file to new one

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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  3. #23 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    I'm gonna get an ICM this weekend, as for the PCM, its been a ZZP tune for the last year with no issues. But I am getting a DHP tuner in a week
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  4. #24 Re: Tried everything for this misfire 
    GTP Level Member Silver2kgtp's Avatar
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    If you're gonna get an ICM from junkyard grab a PCM also. When you get DHP then read and save your ZZP PCM and flash the spare. Won't hurt to try

    http://s1292.photobucket.com/user/si...d%20Prix%20GTP
    10.99 @ 121.99 1.74 60' (Ran out of fuel : +18 AFR)NO SPRAY!!!
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  5. #25 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Not a bad idea!! I sure hope the ICM is the problem though lol
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  6. #26 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    most junk yards dont know the pcm is in the air box. i bought two air boxes for 12 each, with the pcm inside them both. pretty sure they charge more for the pcm alone.

    gave one air box away, sold the other one.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  7. #27 Re: Tried everything for this misfire 
    Donating Users 16MustangVet's Avatar
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    dont know what happened to the other thread or why people make new ones instead of updating the original thread all that does is make it harder to figure out whats going on and when it started ect ect.....

    pretty sure i mentioned icm in the orher thread though reading about this. icms are not an uncommon thing especially if you move the coil packs around and still have miss fire then me personally id try and icm after that. junk icm you can replace coils until your blue in the face and it wont chanfe a thing.

    doubt its the pcm.
    How I treat my car: wreck,fix, repeat.
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  8. #28 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Scotty I was trying to think of a way to sneak one out hahahahaha
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  9. #29 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    that theft trick was passed down to me,,,,,i keep passing it along myself lol

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  10. #30 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Gonna stuff the ICM in there too haha
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  11. #31 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Here is the latest update. Still misfiring, put the new ICM in and it didn't fix anything. I cleaned all the contacts off and made sure everything was corrosion free and it didn't fix it.

    Anyone else have a guess? I may look into buying a motor to build and then drop it in
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  12. #32 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    new engine wont fix an electrical issue. do a compression test on that cylinder, see if its the same as the rest of em. all should be close.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #33 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    I did the compression test last weekend, it's nearly perfect.
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  14. #34 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    sounds like a bad wire somewhere, time for the ohm meter to come out.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #35 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Like something inside of a loom? Blaaaah
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  16. #36 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by Dadkota View Post
    Like something inside of a loom? Blaaaah

    sadly, yes. look around the pcm's wires to it, the loop on the d/s dog bone. the icm harness to the crank and cam sensors. bad grounds on the tranny. the injector wires. aka f ing nightmare lol

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  17. #37 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Yea I suppose I gotta. I searched for a while today for freyed wires in a bunch of areas but came up empty. I didn't use a multimeter, was just looking for cracks/exposed wires and ****
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  18. #38 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    the icm harness can be all fed up and you cant tell unless you take it off the engine, mine was torn up good, cause all sorts of codes to pop up.

    what mine looked like.
    Tried everything for this misfire Attached Images

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  19. #39 Re: Tried everything for this misfire 
    GT Level Member Dadkota's Avatar
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    Well what's throwing me off is there is no codes at all! This was the plug that goes into the bottom of the ICM?
    '01 GP GTP- Intake, Plog, 3" DP and Exhaust, DHP tuned by me, GMPP sway bars, 3.5 MPS, cold plugs and tstat
    -180,000 miles and climbing
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  20. #40 Re: Tried everything for this misfire 
    Killa Bee Scottydoggs's Avatar
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    that goes from the icm to the crank and cam sensors, also has the ground loop on it.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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