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1990 bonneville will not idle
Posted: Thu Sep 21, 2017 1:15 pm
by Frustrated1
I have replaced the icm,tps,crank sensor( hope is in right watched a lot of videos) also replaced cam sensor and wiring harness that goes to all of those. Tach does not work. Car will run at a higher rpm but will not idle. Please help anyone.
Re: 1990 bonneville will not idle
Posted: Thu Sep 21, 2017 2:03 pm
by J Wikoff
Try unplugging the MAF and see if the behavior changes.
Are there any other symptoms, trouble codes, sounds, etc?
Re: 1990 bonneville will not idle
Posted: Sat Sep 23, 2017 10:06 am
by MattStrike
A few other things that could cause poor idle are EGR stuck open and vacuum leaks.
Re: 1990 bonneville will not idle
Posted: Sat Sep 23, 2017 10:14 pm
by 96 SSEi
YES, UNPLUG THE MAF SENSOR AND SEE IF IT IMPROVES. then you can check the IAC IDLE AIR CONTROL. if that fails, it would cause your issue.
Re: 1990 bonneville will not idle
Posted: Sun Oct 15, 2017 11:26 am
by retroren1
I had this same issue on my '90 bonnie and it was the iac.