Check for injector pulse, when problem is ongoing. Use a gage and check fuel pressure. Are there any applicable trouble codes?
I tried to answer a similiar question, a few days ago. No luck, the person checked, everything ok. I was at a loss.
Don't pay any attention to diagram, just testing. I've had problems posting diagrams, lately.
Sunday, December 23rd, 2012 AT 3:52 PM