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#1
03-06-2008, 08:31 PM
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gtp cut off 104mph?
i was running my car tonight just for some fun and it cut off at 104mph? ive had the car drop the needle at 115 before anyone know why that happened? just wanna make sure nothings wrong thanks.
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my car 1998 grand prix gtp,borla catback exhaust,fwi,u-bend delete,resonator delete, 180 t-stat,zzp 1.0 pcm,zzp poly motor mounts,zzp shift kit,3 inch high flow cat,3 inch cutout. not installed:zzp 3.4 mps,autolite 104's next to order:headers with 3" downpipe 
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#2
03-06-2008, 09:50 PM
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Re: gtp cut off 104mph?
Quote:
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#3
03-06-2008, 09:55 PM
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Re: gtp cut off 104mph?
the only thing thats been changed since i had it over that was i added a cai.i dont think that woulda made a difference in the cut off though.
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my car 1998 grand prix gtp,borla catback exhaust,fwi,u-bend delete,resonator delete, 180 t-stat,zzp 1.0 pcm,zzp poly motor mounts,zzp shift kit,3 inch high flow cat,3 inch cutout. not installed:zzp 3.4 mps,autolite 104's next to order:headers with 3" downpipe
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#4
03-07-2008, 09:37 AM
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Re: gtp cut off 104mph?
do you have a Heads Up Display? How does that read when the car cuts off? Maybe your analong speedo is just a little in accurate.
And by cut off, you mean the car dies? or does it just lose power untill you slow down? Another question, when you look down at your speed, is it right when you start to lose power? I only ask because, (not sure if this is the case) but some vehicles will cut off at say 110, but then they wont cut back on untill the vehicle slows to say 105. If your so worried about it, then just have your PCM flashed by ZZPerformance. they will raise the governer speed.
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-2000 Grand Prix GTP 170,000mi (daily driver) -2000 Olds Alero 100,000mi (soon to be DD with gas at $3.45/gal) -1997 Chev K1500 4x4 115,000mi (Natalie's truck [nans_grandprix]) AF "2.0" Community Guidelines Conservative Victory 2012!!! "I'll Keep my Guns, Freedom, and Money. You can Keep the Change!" ----->>>>> Did You Know? <<<<<-----
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#5
03-13-2008, 12:29 AM
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Re: gtp cut off 104mph?
just wanted to let everyone know.i ran the car tonight after a trip to town,got on it hard and dropped the needle past 110.my only guess is the other night the car wasnt fully warmed up and idk if maybe that had anything to do with it im not sure.just wanted to let everyone know incase anyone else had the same happen.
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my car 1998 grand prix gtp,borla catback exhaust,fwi,u-bend delete,resonator delete, 180 t-stat,zzp 1.0 pcm,zzp poly motor mounts,zzp shift kit,3 inch high flow cat,3 inch cutout. not installed:zzp 3.4 mps,autolite 104's next to order:headers with 3" downpipe
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#6
03-13-2008, 10:13 AM
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Re: gtp cut off 104mph?
 Lets clarify some disinformation guys. The OP has a GTP. The speed limiter on a GTP is programmed to cut off at around 128 mph which is consistent with the "H" speed rating of the original GoodYear Eagle GT tires. If you have the Heads Up Display (HUD) it will display the speed accurately above the limits of the analog gauge at the IP. Many GTP owners including myself have pushed the envelope well into the 120 mph plus range. As mentioned a basic Stage 1 reprogrammed PCM module from either DHP, ZZP or Intense will remove the speed limiter and then speeds above 128 mph is not uncommon even with a stock GTP. Of course, modded go much faster. Also, the final drive gearing on a GTP is 2.93:1.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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