1993 Aerostar doesn't fast idle on cold start. Idles fine after warm up. Starts with difficulty when below 32 degrees
have the same problem?
Tuesday, February 22nd, 2011 AT 2:50 PM
Should idle fast at cold start. The computer does this to quickly bring the engine up to temp. It should slowly drop the idle after a minute or so.
Hard starts during cold could be bad gas (use a bottle of HEAT), or a failing fuel pressure regulator. Check it with a fuel pressure gauge. Pressure should be 39-45 psi and hold for at leas 15 minutes after you shut down engine. If it doesn't, bad FPR