Quote Originally Posted by CODFATHER View Post
Took the car in today after dealing with an annoying problem for quite some time. I searched around online like crazy to see what the widest tire was that I could fit on a stock 18" gxp front wheel and ended up going with a set of 275/35/18 's. Almost as soon as I left the parking lot after having the new tires put on, i was having problems with my brakes.. Every time I would tap my breaks or go to stop, my anti lock brake system would kick in and almost nearly keeping from stopping completely. it scared the sh$# out of me! Once I would hit around 55-60 mph my abs, service brake soon, and traction control lights would all come on and the problem was solved. But ONLY if i get up to this speed will it fix my problem. So i took the car in today and found out that it is most likely the way the pc is tuned because when they took it for a drive, they said that my rear tires were showing about 4 mph faster than the front tires... He also said that my rear tires (nearly brand new) were wearing unevenly and that the insides of the were worn down to almost nothing! most likely an alignment issue which i can handle. But i have no idea how to tackle this issue with the wider front tires keeping me from being able to use my brakes the way their meant to used.
It is not the bearing or the sensors btw, had them all checked out and they are nice and tight.

Problem number 2
The car started over heating, long story short I need a new water pump. I wasn't seeing anything leaking and finally found that it was dripping a bit from the seal and that's why i never had a trace of it leaving the car. Filled up my reservoir and it fixed the problem (for now) but i was told that the pump required a manifold as well to replace and that it would be $800!! No way in hell am i paying that for something this simple. Anyone had any experience with this issue? Also when i brought my car in the shop told me that my throttle positioning sensor was going bad or was off or something and he said he cleaned it up.. that being said, my car now idles at 1100 rpms and is stupid annoying to sit in when its running. its been 6 hours and i already want to go back and wring this guy's neck because it now has an idle speed of about 17 mph!! I cannot stop very well any more at all, between the mix of the anti lock brakes kicking in when they arent supposed to and the car not wanting to stop because the motor is idling so high, i may run into a ton of problems in the future. its scary driving this thing now especially because of the high idle. Could he have messed with the position or something?
Any help would be much appreciated
As mentioned above either get your PCM Tuned or match the 35 series tires on the back as well. and yor issue will go away. however your speedo will more than likeley be off if you go under a 40 series. so choice is on you for the tires.

problem two there is no external throttle position sensor so that is a lie. you use a electronically actuated throttle body everything is internal. my first course of action would be to make sure the harness leading up to the plug is snug and secure and that no pins got bent while the dickweed was messing with your car. The plug that goes to your throttle body also needs to be snug and secure so check there as well. and remeber since the throttle body is commanded electronically by the PCM based off of the gas pedal position. make sure your floor mat isnt interfering with the pedal. other wise there is no other adjustments you or him could possibly make unless you use a tuner.

third: your water pump...hardest part is taking out the battery to get to it cleanly i have a thread on gmls4.com but will post instructions if you need them. there is no "manifold" to worry about. simply remove battery remove belt unbolt 4 screws to the pump and it will come out and then replace.the hardest part is probably battery removal. look on gpona.com under the gxp area for the battery removal sticky.