• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Recent content by CopperGTP

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    New daily driver

    So for the last year or so, the 2004 GTP was my daily driver. Did all the maintenance stuff and got her running as good as I could. There are factory freaks (I’ve owned many of different makes models) that just perform so much better than the “magazine” stats, and then there are the cars built...
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    Intense tune on stock 2004 GTP results.

    So for those of you looking into tunes, here is my firsthand experience with basically a mail order tune. My 2004 GTP (not a comp G) couldn’t pass emissions in my county because of the infamous P0420 code. Now, the cat still flows just fine, but it does have 172K miles on it if it’s original...
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    Intense Racing tune on stock '04 GTP

    So it's time for annual inspection for the GTP, and it's not gonna pass emissions. Good old P0420 and evap code as well. Now, that being said, I've been planning on going with a 3.6" pulley, fenderwell intake and a 3" DP (maybe even full 3" exhaust) for awhile now but haven't gotten around to...
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    2004 MCSS (L67) vs 2004 GTP (L32)

    Just curious to find out what anyone's thoughts are on this. Which one do you think is quicker? Other pros and cons? This would be between a 2004 Monte Carlo SS Dale Jr. edition and a 2004 GTP, both stock. On paper, the GTP has 20 more HP, but weighs more, although power to weight ratio is...
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    Scanner not reading KR?

    I have an android tablet with torque pro (with the GM PIDS installed) and a BAFX OBD2 Bluetooth adapter. It reads everything properly (speed, rpm, coolant temp, etc) but KR stays at 0 no matter how hard I get on it. I have a hard time believing this car has absolutely zero knock, even at WOT...
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    Mustang GT doing Mustang things

    I had the L67 Monte Carlo SS out last night and lined up at a light with a Mustang GT. It was raining, and I knew I had no chance of getting any traction with the tires that are on it now in the wet, but I figured I'd goose it anyway just to rile up the guy in the Mustang. Spun it off the line...
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    pop goes the head gasket

    I've had an exhaust leak for a over a month now and figured I'd buy headers and a downpipe and just kill two birds with one stone. Well, it turns out the exhaust is fine, the head gasket is blown out. Thankfully, there is no oil and coolant milkshake, but I'm pissed that I gotta rip the whole...
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    Looking for information on why 2004 GTP's need a larger pulley

    I've seen on multiple sites that sell pullies that they recommend adding .1-.2" to the pulley size with an 04 GTP compared to other cars, although the stock pulley size is the same at 3.8". Anyone know why that is? I'd really like to run a 3.4 inch pulley, and I don't think shelling our 100...
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    So what's different about headers after 2004?

    I'm searching ebay for headers for the 04 GTP and so far everything is coming up as '97-'03, and only fit the monte carlos and regals in '04 and up. What changed in '04 for the GTP? I mean, I know it's a series III engine with the gen 5 M90, but so are the monte and regal I thought? Why would...
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    interesting misfire issue

    I know there are tons of misfire threads, but never have I seen the issue I'm having now, and it's so weird that it's actually somewhat entertaining. What started off as a misfire under load (no CEL) has gotten gradually worse to where I finally did get a CEL (random multiple misfire), but part...
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    new guy

    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...
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