Thread: i have a cylinder #1 and #5 intermediate misfire

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  1. #1 i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    i have had this problem for about 3 months. The car misfire when there is a load on the engine but when i reved in neutral it wont misfire or bog. there are no codes that are showing i have cleaned the MAF that didnt help. i took it to a shop and after 100$ they told my that cylinder #1 and #5 are intermediate misfireing so i replace those injectors and still have the problem and that is where i am now. Can anyone help me!
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  2. #2 Re: i have a cylinder #1 and #5 intermediate misfire 
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    Icm or a coil pack is dying.
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  3. #3 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    where can i get icm and how much it cost
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  4. #4 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    is any one selling injectors for a 99 gtp
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  5. #5 Re: i have a cylinder #1 and #5 intermediate misfire 
    Donating Users mystic231's Avatar
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    If you have the original wires on it change them. Old wires can "crossfire" and if it's a '99 it's time anyway. #1 and #5 run in the same plastic loom across the front of the valve cover. You can get OEM wires from ZZP for $35 or it's a dandy time to upgrade.

    Next, change your coils. They run about $25 each. I would be surprised if it was an injector problem.
    Sounds like a problem I had with my F350 SuperDuty. Ran fine from 0-37 miles per hour. Anything over that and the truck bogged and kicked. It would NOT set a code. Turned out to be the #6 coil (It was a V10). Changed the coil and problem solved.
    '98 Bright Red GT 278,000 miles and counting...
    '02 Galaxy Silver GTP GMPP Suspension, F Body front brakes, TDC FWI intake, Ported M90, Intake, and Throttlebody, Overkill PCM
    '02 Bright Red GT
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  6. #6 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    yo thanks i will try that and tell u my out come
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  7. #7 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    and is that is in wires light spark plug wires or the injector ones
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  8. #8 Re: i have a cylinder #1 and #5 intermediate misfire 
    Donating Users mystic231's Avatar
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    Spark plug wires. Plug wires carry high voltage and degrade over time. Injector wires carry low voltage signals, no more than 12 VDC, and last indefinetely.
    '98 Bright Red GT 278,000 miles and counting...
    '02 Galaxy Silver GTP GMPP Suspension, F Body front brakes, TDC FWI intake, Ported M90, Intake, and Throttlebody, Overkill PCM
    '02 Bright Red GT
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  9. #9 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member DOUGLASMELTER's Avatar
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    replace the plugs too. i agree that its probebly the wires but do the plugs. the cold autolite plugs from autozone will run you $11 for the set
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  10. #10 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    what is the best way to get the ones in the back
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  11. #11 Re: i have a cylinder #1 and #5 intermediate misfire 
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    They aren't too bad to get to by just reaching over the top. Welcome to the club.
    2000 GRAND PRIX GTP COUPE WITH THE NORMAL LIST MODS TO MAKE IT LOUDER, FASTER AND OF COURSE SEXIER!! 267 WHP @ 9000 FT ABOVE SEA LEVEL
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  12. #12 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member tylerbinski's Avatar
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    or unbolt the front dogbones and pull the engine forward.. then slip the bolt back in to the other hole in the bracket..
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  13. #13 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    My car works now
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  14. #14 Re: i have a cylinder #1 and #5 intermediate misfire 
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    nice congrats ha best feeling is knowing when you fixed or improved something!
    hogan 3inch DP u bend delete ,180*tstat, autolite 104s, LED interior, 4" FWI, 2000watt system, bullitt rims, zzp pistons, pems, alt rewire, thrush muffs, 3.4 zzp mps, transgo shift kit, triple edge performance trans. autometer triple pod :SOON: urlosn HPT PCM tune, HEADERS, 1.9's
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  15. #15 Re: i have a cylinder #1 and #5 intermediate misfire 
    GT Level Member Will5600's Avatar
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    ya it feels so good to go fast haha
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