98 4.0. If it sits more than 12+ hours, the first start is 3-4 cranks. I've searched on there for the last couple of days and can't find a firm duplicated problem.
When I put a fuel press gage on the rail, it indicated 0 psi which would seem like a check valve problem. However, once I put the key in and go to crank, the press jumps to 40 psi before the starter even engages. Over the course of a couple of days, I've even tried the 10 second wait, the on/off/on/off/on/crank method, and it's still the same....... 3-4 cranks for initial start.
I've tried releasing the fuel press at the rail back down to 0 ( to try to imitate a bad check valve ) and it starts on the 1-2 crank even after it sits for 4-6 hours with 0 fuel pressure. Since it restart so easily, I don't think the initial hard starts have anything to do with the ECU looking for any signals from a CPS.
My first question is, for those of you with a confirmed bad check valve, how fast does it bleed down? I've left my fuel press gage hooked onto the fuel rail for 1/2 an hour and would still maintain 38+ psi.
When I put a fuel press gage on the rail, it indicated 0 psi which would seem like a check valve problem. However, once I put the key in and go to crank, the press jumps to 40 psi before the starter even engages. Over the course of a couple of days, I've even tried the 10 second wait, the on/off/on/off/on/crank method, and it's still the same....... 3-4 cranks for initial start.
I've tried releasing the fuel press at the rail back down to 0 ( to try to imitate a bad check valve ) and it starts on the 1-2 crank even after it sits for 4-6 hours with 0 fuel pressure. Since it restart so easily, I don't think the initial hard starts have anything to do with the ECU looking for any signals from a CPS.
My first question is, for those of you with a confirmed bad check valve, how fast does it bleed down? I've left my fuel press gage hooked onto the fuel rail for 1/2 an hour and would still maintain 38+ psi.