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Recent content by 99GPGTP

  1. 99GPGTP

    questions about 3800 heads and which cam to go with.

    im about to start some major upgrade on my 99gtp. i have a set of heads that im gonna have ported and milled valve guides to run bigger cam. what is the biggest valves i can have put in the heads. im also torn between the XPZ cam and the intense stage 4 cam. my plans are to eventually make...
  2. 99GPGTP

    Can i use my GTP tune in my regal GS

    I have a zzp 1.0 pcm in my 99 gtp. I recently bought a hpt pro and i unlocked the gtp pcm and saved the file to my laptop. I unlocked my 01 regal GS that i just bought and i want to upload the tune from my gtp to the GS. But it won't let me. How do I go about copying or changing the...
  3. 99GPGTP

    looking to do a cam swap but cant decide which cam

    im looking in to doing a cam swap in the next 6 months and not sure what cam i should go with. i want it to have a choppy idle but be streatable and not kill fuel mileage to much will have pcm retuned for cam at time of swap. here what i have done so far fenderwell intake speed daddy headers...
  4. 99GPGTP

    2000 Gp GTP starts but dies 2 secons later

    my co worker has a 2000 grand prix gtp 2door that will spin over and fire up but dies 2 seconds later, no codes stored. sometimes when i hook up scanner i get no comunication, all fuses are good in car. the DIC doesnt work at times but im pretty sure thats not the cause. i think its a symptom...
  5. 99GPGTP

    Still getting HORRIBLE fuel mileage please help me

    heres the story again. 3 years ago trans went out. finally last summer i got money to fix it. went to load car on trailer and fuel pump was bad so i had to replace pump. i put a AEM 320lph pump in my assembly. car fired right up. i removed engine and trans. replaced the trans with a shift kit...
  6. 99GPGTP

    poor fuel mileage with zzp 1.0 pcm

    heres the story. the transmission went out in my car 2 years ago. i just recently for it fixed.while the car sat the fuel pump went bad, i installed a AEM 320lph pump. i put new oil pan and timing cover gaskets on my motor while engine was out. Installed a ported m90 housing. and a zzp 1.0...
  7. 99GPGTP

    bad news on my 99gtp

    II recently built the trans in my gtp, I was coming home from summit racing store in ga from getting the fpr and an fittings I needed to fix my car and keep it from running so rich. While coming home I decided tosee what the car would do from a 80mph role. I went wot and boost peaked at 13 psi...
  8. 99GPGTP

    car only getting 15mpg. and a screeching noise from rear main/flywheel area

    Couple years ago the trans went out on my gtp, I finally got trans rebuilt and put back in case. While trans was out I had motor out and put new timing chain dampener and oil pan basket on motor. I put a 2500 stall converter in trans, bypassed radiator cooler for trans. Car wouldn't start...
  9. 99GPGTP

    Fs: 99 grand prix gtp 4dr silver in rome ga

    I am wanting to sell my 99 grand prix gtp. The car runs great. Has 177*** miles the car is a 4dr and is silver with graphite interior. I recently replaced front and rear brakes. Body is in great shape with a few small dents here and there. Replaced intake and head gaskets at 147*** i have title...
  10. 99GPGTP

    n* and ls1 throttle body questions

    im looking to get either a north star tb or a ls1 tb. looking to get a used one from a salvage yard what year and model car/truck do i need to get the ls1 tb off of, and what year cadi do i get a n* tb from to still retain cruise
  11. 99GPGTP

    unable to post pictures

    i have been trying to post pictures of my car and mod but i am unable to. any information. I keep getting a upload failed error. i know the picture is below the file size limit and correct file type. I know what i am doing but this site wont let me upload. i can upload the same pictures to...
  12. 99GPGTP

    autometer lowband Air/fuel gauge question

    i installed a air fuel gauge in my pontiac that i had in a box in the building. It gauge and my scanner both reads lean most of the time and the car stays in closed loop for a long time, that car started throwing several codes after i hooked up the gauge. P0171 p0134 p1133 and i couple more...
  13. 99GPGTP

    resinator questions and sound deadner

    i have speed daddy headers with no resinator or converer. i am running super 44 flowmasters. i installed a 24" glaspack for a resinator but it took away the tone of the mufflers and just gives me a annoying burrrrrr noise while driving. with no resinator it rasp very bad and it too loud. i am...
  14. 99GPGTP

    ZZP trans or not

    i am looking to replace my trans in the next 6 months to a year and cant decide who to go with. i have been looking twards getting a transmission from zzp with the single chain upgrade, imput and pump shaft upgrades, 3000 stall with flex plate. all shipped to my work for 3,414 and then it will...
  15. 99GPGTP

    what mufflers should i go with

    i just put speeddaddy headers on my car last week end and i am gonna be getting this exhaust from ZZP with out mufflers ZZ Performance right now i have thrush turbo mufflers and while i am driving they have a anoying droaning tone that i want to get rid of. i want something that will me...
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