pulsating of the rpms MODDED

rczzv · 06-28-2008, 01:06 PM

Hey guys I have a 2004 Pontiac Grand Prix GT2 with the 3800 non supercharged with k&n cold air intake a gt competition cam, pro magnum roller rocker arms, Ge forged pistons, zzp offroad down pipe and MSD plugs and wires, reprogramed ECU and corsa exhaust from pfyc everything else was purchased from zzperformance but know when im at an idol sitting in park my car pulsates like small little revs and it does it with the ac on and off. I think I might have a coil pack issue but I wanted to ask the experts let me know what you think.
Thanks
Zac

Toofastgs · 06-28-2008, 01:47 PM

make sure your cam timing was right?

GP2003GT · 06-30-2008, 08:28 PM

as was suggested to me, you might need to get your car tuned..

Bio248 · 06-30-2008, 11:59 PM

with that amount of mod work and no tuning besides a flashed (as far as i know) pcm you car is way out of whack. you need a tuner to know what is really up. either you have a vacuum leak or you're just going to deal with a rough idle from having modded your car.

2 guesses, one answer.

wisconsin where? i have a scanner for borrow or you can entertain me for a night depending upon distance.

rczzv · 07-01-2008, 12:16 AM

Im in Waupaca WI but I go to Appleton alot and pretty much where ever that would be cool if you could help me out where are you at maybe we can meet up

Bio248 · 07-01-2008, 12:40 AM

plenty far away.

appleton is a few hours from me and im not ever in that area. sorry, cant help ya.

06-28-2008, 01:06 PM	#1
rczzv Community Vendor Join Date: Feb 2008 Location: Wisconsin Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	pulsating of the rpms MODDED Hey guys I have a 2004 Pontiac Grand Prix GT2 with the 3800 non supercharged with k&n cold air intake a gt competition cam, pro magnum roller rocker arms, Ge forged pistons, zzp offroad down pipe and MSD plugs and wires, reprogramed ECU and corsa exhaust from pfyc everything else was purchased from zzperformance but know when im at an idol sitting in park my car pulsates like small little revs and it does it with the ac on and off. I think I might have a coil pack issue but I wanted to ask the experts let me know what you think. Thanks Zac

06-28-2008, 01:47 PM	#2
Toofastgs GT Level Member Join Date: Jan 2008 Location: Tulsa, Ok Posts: 325 Thanks: 0 Thanked 1 Time in 1 Post iTrader: (0)	Re: pulsating of the rpms MODDED make sure your cam timing was right? __________________ We can’t help ourselves. We see a line, we want to cross it. Maybe it’s the thrill for trading the familiar for the unfamliliar. A personal dare. The only problem is once you’ve crossed it’s almost impossible to go back. But if you do manage to make it back across that line you find safety in numbers.

06-30-2008, 08:28 PM	#3
GP2003GT GT Level Member Join Date: Dec 2007 Location: Fayetteville, NY Posts: 416 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Re: pulsating of the rpms MODDED as was suggested to me, you might need to get your car tuned.. __________________ http://www.cardomain.com/ride/2556536 NKG Iridium Plugs, 8mm Spiro Wires, ZZP Reprogrammed PCM, ZZP 3" full cat, ZZP Ceramic Coated Ported Manifolds, ZZP HV3, ZZP HVTB, ZZP ER Ratio Rocker Arms, ZZP Drilled 180* Thermostat, MotorSports Performance Intake, Reptile's IAT and dezldave tuned

06-30-2008, 11:59 PM	#4
Bio248 GTP Level Member Join Date: Jan 2008 Location: WI Posts: 1,376 Thanks: 0 Thanked 8 Times in 8 Posts iTrader: (1)	Re: pulsating of the rpms MODDED with that amount of mod work and no tuning besides a flashed (as far as i know) pcm you car is way out of whack. you need a tuner to know what is really up. either you have a vacuum leak or you're just going to deal with a rough idle from having modded your car. 2 guesses, one answer. wisconsin where? i have a scanner for borrow or you can entertain me for a night depending upon distance. __________________ 98 XGT - 3.2/3.4, s&s, ported m90/TB/LIM, 1.9s, jp dbl; tinted, blacked out, lowered soon -> e85, meth, and a lot smaller pulley

07-01-2008, 12:16 AM	#5
rczzv Community Vendor Join Date: Feb 2008 Location: Wisconsin Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts iTrader: (0)	Re: pulsating of the rpms MODDED Im in Waupaca WI but I go to Appleton alot and pretty much where ever that would be cool if you could help me out where are you at maybe we can meet up

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07-01-2008, 12:40 AM	#6
Bio248 GTP Level Member Join Date: Jan 2008 Location: WI Posts: 1,376 Thanks: 0 Thanked 8 Times in 8 Posts iTrader: (1)	Re: pulsating of the rpms MODDED plenty far away. appleton is a few hours from me and im not ever in that area. sorry, cant help ya. __________________ 98 XGT - 3.2/3.4, s&s, ported m90/TB/LIM, 1.9s, jp dbl; tinted, blacked out, lowered soon -> e85, meth, and a lot smaller pulley

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