Rough Idle

[ram5757]

We replaced all the injectors on my 1991 z32, after doing this we found that the car starts but it races when idleing, when the rpms are raise to 2500 and drop down to idle the car died. I changed the AAC Valve it seems to work a bit better as the car now does not die, but the rpms are still racing up and down oscillating between 900 and 2000. Checked all the vacuum lines and seem to be ok.NEED HELP DESPERATELY

[-=BoYo=-]

i have the same problem but it does not go as high and does not die.but like at lights it will raise and drop when ever it wants..

TELL ME IF YOU FIX IT....

[evildky]

i gotta say that sounds like a vacume leak, might want to try spraying a bit of carb cleaner around the intake at every possible joint, if it casues the idle to change you found a leak, could also be a vac leak further from the manifold, where the val lines go to the turbo's, could be a leak in the intake piping as well, or the crossover tube, someone could have lost an o-ring when changing the plugs

[-=BoYo=-]

iv check my car for boost leaks 3 times im positive i found them all.

[-=BoYo=-]

I have 3 bad injectors that im in the middle of replacing soo thats was prob it but ill post and tell ya guys what happend