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Recent content by 99coupegtp

  1. 9

    Bonneville GXP Wheels on Grand Prix

    I've done a bit of research on fitting Bonneville GXP wheels onto a 6th gen Grand Prix and it looks like it will work but I have some questions. What is the offset of the Bonneville GXP wheels? I've seen +51mm and +42mm Do they require spacers or anything of the sort to fit nicely or do they...
  2. 9

    Fun TPS Issues

    My car has had an issue for some time that has finally gotten on my nerves enough for me to make a post about it searching for a solution. I have a N* TB and have tried at least three different TPS and at least two different brands of TPS. The issue is that the TPS will erratically show non...
  3. 9

    4th gear and TCC lockup issues

    Hey all, I have a 4T65E-HD with around 25k miles on it and a couple days after a recent road trip with some vigorous mountain carving it has started to do strange things. At speeds less than 50mph 4th gear and lockup will work most of the time but TCC lockup will disengage and the...
  4. 9

    Intermittent Idle Surge/Rough Idle

    The car in question is 99 Grand Prix GTP. Half the time it will crank up and idle just fine, other times it will crank up, idle fine for 30 seconds and then idle surge for another 30 seconds or so. The surging is anywhere from 200-500 RPMs. Last night it did something completely new though. I...
  5. 9

    First Run After Engine and Trans Rebuild

    On 2/28 I took my car to the drag strip for the first time since finishing the rebuild back in September. I didn't have any troubles and I was very happy with how well it ran. It ran 13.57s @ 102.87mph on the first run. The last 3 runs were consistent 13.7x. All runs were done on street tires...
  6. 9

    Stuttering Under Hard Accel eration

    I'm completely stumped by what my car is doing and I wasn't sure what to search. My issue is that when I'm accelerating rapidly the car begins to stutter in the 5200-5800 RPM range. This issue doesn't appear to occur in first gear but it does occur in second and third gears. Things I have...
  7. 9

    Backyard Engine Rebuild

    So my father and I rebuilt my engine even though a few people have said not to. The engine was rebuilt because it spun a rod bearing at 139K miles. Following are the details of the rebuild. Here is everything we had done to the block: New cam bearings New freeze plugs Block was decked (.007"...
  8. 9

    Camshaft Install

    So my engine spun a rod bearing and since I'm rebuilding it I figure now would be a great time to install a mild camshaft. I'm looking at the VS and the S1X. What chain, lifters, and springs do you guys recommend? I'm trying to keep this reliable and I have read that with 105# springs the...
  9. 9

    Driver Information Center Woes

    So I've purchased a couple GTP DICs. Out of 4 only one of them shows Performance Shift when it is turned on. The others have the spot on the LCD but won't turn on. The problem with the one that does show it is that the bulbs for the LCD will not turn on and I've tried bulbs that work in other...
  10. 9

    Lightning Strike

    This is my first post so if I do anything wrong, please let me know. On 09/02/14 my car was struck by lightning and I have been fighting with the dealership and insurance to get the car fixed. So far the dealership has replaced the alternator and battery. The car runs and drives. My current...
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