95 Z34 High Idle and Stall
 

Hi, im new to this forum but i have been reading it for a long time, i have a 95 monte carlo z-34, white, its an awesome car however lately i have been havign nothing but trouble. Whats happening now is that the other day it stalled after i was stopped at a red light and went to accelarate, i started it up fine and continued driving, then a few days ago i went to start it and it was idle'ing really high (2500rpm) so i turned off the car and left it, i recently started it to move it out of the way of another car i was blocking and it drove fine, i have also noticed it kind of sounds like somethig relativly high pitched is winding up when i rev it up, might be related? Again its nice to meet you guys and hope someone can give me a hand! Thanks!!

RE: 95 Z34 High Idle and Stall
 

It sounds like a bad intake gasket or a broke vaccuum hose.

RE: 95 Z34 High Idle and Stall
 

Awesome, my freind thinks it might be the throttle positioning sensor, is that possible or no? I wanna start fixing it myself because im tired of untrustworthy mechanics so i'll try what you suggested first. Thanks alot for the help!

RE: 95 Z34 High Idle and Stall
 

Usually a bad throttle postion sensor will result in a low idle condition. The high pitched whistle sound is usually an air leak. If you don't see a bad vaccuum hose or an obvious leak, take a can of carb cleaner and spray a little (engine running) around the throttle body, intake mounting, etc... if engine speed changes you found your leak.

RE: 95 Z34 High Idle and Stall
 

This is an odd one, usually a vac leak will give you a lower than normal idle... I originally thought TPS as your friend did. To make sure, I would run your car to an AutoZone or a parts house that can check codes to tell for sure. I still would not rule out the vac leak..

RE: 95 Z34 High Idle and Stall
 

hmmm ok, the wind up noise i was describing doesnt really sound like air, it sounds mechanical, like when your wheel is cranked all the way to one side and u hold it there and hear the power steering going, it sounds like that but it sounds like it speeds up and slows down with the idle

RE: 95 Z34 High Idle and Stall
 

oh yeah, it is also yet to throw the check engine light, dont know if that helps any and i really appreciate all the help guys!

RE: 95 Z34 High Idle and Stall
 

Have you checked your PS fluid? Even though you have not seen a check engine light the computer could still have trouble codes saved.

I have a Hypertech programmer that pops up two codes everytime I check for codes that never generate a Check Engine light. If you have a AutoZone in your area they do it for free..