PontiacBonnevilleClub.com

hey guys. well i finally took care of my cars issues when i got my new tires so i could get a nice dead on alignment.
so i replaced my front driver side wheel bearing, both front sway bar links, and the rear air shocks. got the best brand of everything from NAPA.

so heres a little explaning b4 my question... i remember b4 i changed the shocks, if i would turn the key to the "ON" position with the car not running, after about 20-30 secs i would hear the air compressor run for about 8 secs and then turn off. same thing after u start the car, the compressor would cycle for about 8 secs, 20-30secs after it was started.

well after i was done with the install, i did the same test. but now when the compressor came on it did not turn off(took longer then b4, but didnt wait too long). so i went over my install and checked the air line nipples, cleaned of some rust and did it again. still didnt turn off. so then i thought about waiting to see if it ever does turn off. well about 45 secs later it finally did turn off. so i tried it again. key "off" and then "on" again, when the compressor came on it still stayed on for much longer then b4. like 45 secs to a min. then i thought to myself well there could be a line leak(theyre plastic and commonly break/crack) so i should just wait to see if it comes back on. so i waited after it shut off the first time and it did come back on again and ran for about the same time.


so my question is, what the hell is wrong? lol. if anything. i mean my new shocks are SLIGHTLY thicker then the stock ones i removed.... i just dont want my compressor to burn up and have to replace that too.

Does the back end of the car rise while it is doing this?

no it does not. at least not that i notice. still rides and drives fine. but i havent actually held up a yard stick to watch exactly if it moves. any ideas???

and now i intermittently get the "service stability system" message in the DIC. how do i check this out? HP Tuner didnt help.

You'll need to either go to the dealer or someone with a high-end snap-on scanner. Tech II at the dealer would be the best.

00Beast wrote:You'll need to either go to the dealer or someone with a high-end snap-on scanner. Tech II at the dealer would be the best.

You think maybe there is a chance the rear springs are sagging, or do you think the alignment tech would have told him? - BC

What brand shocks did you get? Some have a different sized fitting for the air lines that needs more and larger O rings. Put some soapy water on all of the connections and check for bubbles.

Beast is right in that the only way to know for sure what is setting off the stability system is to have it scanned. You can take it in to a shop, or can purchase the Actron scanner.
http://www.amazon.com/Actron-CP9449-Bra ... 993&sr=8-1

We've had some reports of problems with front springs breaking, but not any that I can recall for the rear springs. As the rear of the car is apparently not rising when the compressor comes on, and that is needed to change the position of the ride height sensor to shut the compressor off, it would appear as if the shocks are not charging with air.

i got all my parts from NAPA. and i always get the most expensive "top brand" part. they just came in a paired NAPA box and said made in the USA. i remember hearing that Monroe makes NAPA's shocks. idk tho.

im just gonna find someone with a Tech 2 or better scanner and save the hassle. if it tells me its a leak, THEN ill look for it.

thanks for the input guys. i'll let u know the conclusion

sweet. so i wasted $50 today. went to the dealer for them to pull the service stability code, which of course i havent seen in a week. get there and he pulls a C1287 and C1288, which are steering position sensor codes that were stored.

soo i was curious. turned the key "on", waited for the pump, only ran for a few secs JUST like it used to...wierd.

and im wondering y i have a steering code. he said its no big deal. but i did put the updated ISS on the car this last fall. and when measuring it up to the old ISS, it was about an 8th of an inch longer. maybe this threw somethin off. idk.... i hate the steering and suspension on these cars

A bad steering position sensor will cause the Service Stability System Message to appear, as that sensor is an integral part of the Stabilitrack system.

Also, are you getting just the service stability system message or do the ABS and TRAC lights come on as well?

If it's just the Stability message, its the Steering Wheel Position Sensor, or the Yaw sensor in the trunk. If you are losing ABS and Traction Control, it could be the Wheel Speed Sensors, but the dealer should have seen that if it was a problem....

yea no trac or abs light. just the stablility every once in a great while. my speed sensor and wheel bearings are good. its prolly cuz i put the updated ISS(intermediate steering shaft) in. the update was SLIGHTLY longer then the old one. and now sometimes when im turning slowly i can hear it creeeeek.

ISS has nothing to do with the Stability System. It's either the Steering wheel Position Sensor of the Yaw sensor in the trunk. I'd start with making sure the Steering Wheel Position sensor is hooked up and not damaged.