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Starting cold, engine rpm surges up and down about 2 to 300 rpm at idle. I replaced battery and alternator, all wires look good. Mid day starting or after warm up, all is good. Idiot lights and headlights flash on and off while this happens. Lasts for 10 to 45 seconds when it happens. Any suggestions ? I'm in the sticks, no Autozone, etc. nearby. Thnx in advance.

Posted / edited by AnonymousUser on : 21-01-2019

Answers :

You did not tell me what YEAR/MAKE/MODEL but I will assume that it is a EFI (Electronic Fuel Injection). The Most Common issue with Dodge and Chevrolet is the Idle Air Control (IAC), then you may have a Vacuum Leak starting...

If you want to detect a Vacuum Leak, Spray Starting Fluid or Carb Cleaner and if it effects the running, then you can locate the Vacuum Leak...
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