Thread: new guy

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  1. #1 new guy 
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    New guy from eastern PA. 2004 GTP. Just picked it up a week ago, 166K miles. Has a slight misfire under load, but I'll be checking and replacing spark plugs, wires, coils or ICM as needed. I have a feeling the PO put crappy plugs in it and didn't gap them properly. Once it's running as it should, I'll probably start some mods in the spring if I'm not spending all my time getting one of my other projects on the road.
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  2. #2 Re: new guy 
    GrandPrix Junkie SgtMarshal's Avatar
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    previous owner might have run lower octane fuel. run a couple tanks of premium through it and see if it goes away.
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  3. #3 Re: new guy 
    GTX Level Member QUICKSILVER462's Avatar
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    Change your spark plugs and ignition wires first to see if that helps with the slight misfire under load before changing your coils.
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  4. #4 Re: new guy 
    GTX Level Member cheatah faheatah's Avatar
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    Welcome, Friend !
    For the record : I am NOT a naked meth-head who shoves rocks up my butt.
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  5. #5 Re: new guy 
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    Howdy, neighbor!
    '97 Grand Prix GT Coupe
    '05 Grand Prix GTP Sport Red Metalic SOLD
    '05 Grand Prix GTP Silver
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  6. #6 Re: new guy 
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    I’m halfway through my second tank of premium and it’s not getting any better. And I let it get pretty empty before refills just for that purpose. I took the metal heat shielding off the spark plug boots, still the same. Wires are brand new OEM replacements, plugs are brand new AC Delcos. I’ll pull a few later to see if they’re properly gapped. I got an ICM and coils coming on Tuesday. We’ll see if that does it.
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  7. #7 Re: new guy 
    Killa Bee Scottydoggs's Avatar
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    what plugs does it have? delco is a broad term. if they are platinum it could the cause of it all. these engine run on iridium plugs, or copper core plugs work best and are dirt cheap at 20 or less for a set of al 104's.

    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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  8. #8 Re: new guy 
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    Good point, I honestly don’t know until I pull one out to look at the PN. I have a feeling I’m gonna be buying a set of 104’s anyway just because of the modifications I have planned.
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  9. #9 Re: new guy 
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    It was the coils. 2 originals reading just out of spec and one aftermarket reading perfect. Put used original ones on from a low mile 2005 Monte SS sc and the car runs great now.
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  10. #10 Re: new guy 
    Killa Bee Scottydoggs's Avatar
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    nice find. they dont usually fail. when they do you find a crack in the plastic most of the time.

    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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  11. #11 Re: new guy 
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    No cracks that I could see. But I figured that’s what it was because it was acting just like my old T Type breaking up under boost.
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  12. #12 Re: new guy 
    GTP Level Member FriboRage's Avatar
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    Good to see another PA guy here, Im a little ways from Allentown!
    --------------------------------------------------------------------------------
    2004 Grand Prix GTP Comp G: Intake, F+R plogs + downpipe, 1.7 YT Rollers, Overkill, F-body front brakes, drilled/slotted r1 concept rotors.
    Sport Edition Kv5 18x8
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  13. #13 Re: new guy 
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    I’m just north of Allentown! Less than 15 minutes from the airport!
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