Dam lt1

[Markemery]

Okay the car was bone stock over that last 2 months i have the pcm tuned (tuned out the EGR/AIR and down stream O2sensors) and i intsalled longtube headers into a 3 in magnaflow catback exaust (minus the cat)



The car idels high it sits at like 2000rpm, eventually it drops down to where it should be, but not all the time sometimes i have to toss it into a high gear to get it below that 2k then pull it out of gear and it will stay ideling at a good rpm.(know that this happened when i drove the car to the shop open headers and back today with the exaust installed)

somone told me it could be a vacume leak, which makes sence to me as i still have the EGR on the back of the manifoild and the part that comes from the old exaust manifold is crimped off just untill i get the egr delete kit which should be here tommrow.

as for the AIR i pulled everything out that has to do with that system, another thing i noticed is that the ABS light is constantly on im not sure if thats conneced to this but i thought id toss that in.

so yeah im taking a look at some lines to see if theres something i misses.

i would apprecate any help you guys might have
thanks
nick

[Jim Nilsen]

With all those codes to look at and all of the mods you have done, it sure seems that vacuum leaks are your main problem. You really can't hear them over open headers more than likely and the new exhaust is still probably drowning them out. Your abs light is probably refering to low vacuum somewhere too.

check your codes

[Satatic]

The egr valve will still open even disconnected. Which causes vacuum leak.