Inspect the air cleaner and air inlet ducting.
Check for unmetered air between Mass Air Flow (MAF) sensor and Idle Air Control (IAC) solenoid.
Check all engine vacuum hoses for damage, leaks, cracks, blockage, proper routing, etc.
Are all the above vacuum checks OK?
If so, try this:
Install fuel pressure gauge.
Verify manifold vacuum is connected to the fuel pressure regulator if applicable.
Start and run engine at idle.
Is fuel pressure between 35-45 psi? If yes, check for bad injectors. If no, check for proper fuel pump operation.
Sunday, July 16th, 2006 AT 5:25 PM