Found another purpose for my test gauge setup... Intermittent hard start with a Cummins M11. Fuel pressure while cranking jumps from 0 - 20 with hang time on the 0 until it finally starts. Extended crank after sitting for a few hours. If only shut down for 5 minutes it will start right up but will take up to 30 seconds cranking the first time in the morning. I'm suspicious of the check valve sticking letting the fuel drain back. Fuel pump is identical to the N14 I've been working on.
Week: 50
Total: 368
Or, it's just worn out.
ReplyDeleteI expect that you'll use that gauge setup often.
So it's not the check valve. Replaced tonight and no change... Still hear fuel draining back to the tank when shut off.
ReplyDelete