I have 91 ford mustang lx 2.3 when it idles it goes down to 500 rpm we have replaced the alternator, battery, fuel filter, fuel pump... We also cleaned out the IAC and the throttle body...

Asked by Dec 21, 2014 at 12:36 AM about the 1991 Ford Mustang LX 5.0 Hatchback

Question type: Maintenance & Repair

For a little bit it kept on dieing after a min

3 Answers

460

Clean the fuel injectors check for vacuum leaks and restricted exhaust

20

Ck throttle body for crap around the throttle plate,this will restrict air flow at idle, thus low RPM

I just cleaned both the throttle body and the idle air control valve

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