The zed started fine yesterday morning and when I went to start it again in the afternoon, it wouldn't start. Usually I prime it until I get a solid 40psi on the fuel pressure gauge, then it starts straight up. Now it primes to 40psi but it quickly (2 seconds) drops down to 30 and sometimes 20psi. I haven't touched the adjustable FPR or any fuel lines. There are no fuel leaks. Fuel pump is brand new and its working fine. I bypassed the FPCU and it still won't start. No error codes. Conzult can't find anything. It cranks and it tries to start (maybe one or two backfires) then just keeps cranking. Between the car starting and not starting, all I did was change the suspension arms and adjusted my clutch. No engine parts were touched. Anyone have any ideas I can try?
Hope there's warrenty on that unit ? sounds fubar to me it cant hold pressure? u haven't kinked any fuel lines? Also check that the fuel pump is getting a steady supply of voltage. Trev
the fuel lines are the same as they were when the car started. The fuel pressure only dropped to 20psi once. The rest of the time its right on 30psi. I'll adjust the FPR and see if once the pressure drops it comes down to 40psi.
A buggered dampner will make it run ubber rich, easy to tell tho, it will hunt at idle Def check ur filter as chrispy has suggested, u may have a tankfull of contaminated fuel? Trev
No Dampner. Fuel filter is clean and I can feel the fuel lines flex before and after the fuel filter when the car is being primed. I just adjusted the FPR to 50psi and its still drops down to 30psi. Just takes a couple of seconds longer. Still no start though. Before yesterday morning, last time I started it was about 3 weeks ago and it started fine then. Maybe air got in the fuel system through the check valve?
Possibly, but should reprime itself pretty quick. Dodgy fuel should still hold the pressure. How's your sparkle plugs looking? Soaked or dry?
ok, ill give it a go plugs were wet but not soaked so I took them out and let them dry, re-installed and still didn't start. there was no fuel in the cylinders so the injectors aren't leaking.
You may have lost a bottom injector Oring, the fuel will drain straight into the bore and not hold pressure. Be careful cranking it cause if a cylinder fills with fuel it will hydrolock it and bust something.
i took out the spark plugs, then primed the fuel lines and there was no fuel in the bores. that was my first suspision and i took it out of the equation straight away. if the car doesn't start by the time i gotta bring it past your shop, i'll bring it on a tow truck and then you can diagnose/fix the problem
get a Gclamp and clamp off the return line on the entry to the regulator, see what pressure it gets up to and if it drops away. If it continues to drop when you do that. You have a leaky Oring
