Intermittent No Start and Fuel Return Line
Reply #9 –
OK the rollover valve stays open to the canister as noted above. But the gas cap is also a pressure vacuum instrument as well. So i dont think it is a venting issue. To check that just remove the gas cap and see if that corrects the issue. I dont think it will.
Try this is the in tank pump working?? And i am going to assume the rail pump is because of your pressure readings. I have a suspicion your in tank pump is not working. If memory serves me the rail pump is not self priming. It has to have the booster pump operating to feed the rail pump. So at this point check the low pressure in tank pump for volume and pressure. I have a feeling it is shot. Just a GUESS.
Your pressures are OK. So the return system is OK. If in fact the return was plugged it would in fact act as a stuck closed regulator and pressures would go through the moon. Once again you have a supply issue and only thing is the in TANK pump sock fuel filter or the pump. I remember some time ago we had an issue with a SAAB that has 2 pumps and the in tank pump was shot and caused a similar ISSUE. Good Luck Tom