Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Finally caught the POS in the act. Crank no start. No codes, no fuel pressure. Got to the FPDM, found no power out of the FPDM on the yellow/violet wire. Power, ground, FP command, FP monitor, and enable from the RCM all present. FPDM sucks.
Slapped in a new FPDM, started right up. I'll drive it more tomorrow.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer." I have learned more by being wrong, than I have by being right.
Finally caught the POS in the act. Crank no start. No codes, no fuel pressure. Got to the FPDM, found no power out of the FPDM on the yellow/violet wire. Power, ground, FP command, FP monitor, and enable from the RCM all present. FPDM sucks.
Slapped in a new FPDM, started right up. I'll drive it more tomorrow.
Very good!
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.