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
Tuesday, February 22nd, 2011 AT 3:06 PM