Figured it out. Check valves in pump aren’t holding, threw check valve after pumps in feed line and now it holds pressure. Before it dropped to 0 instantly.
Walbro285-have four of them in the tank with a Snyder fuel module. They used to hold pressure on shutoff fine, now not so much. They still put out pressure fine.
4? WTF am I missing here? 3 of those will do 1700whp. Not to mention having close to a 80A draw from your electrical system. WOW.
I’ve only got 3 wired up. Just threw the 4th one incase pump died or something.
Too fancy for me. I'm an 8 squirter guy.
Correct. I verified no leaks with the lines, regulators, injectors. With the check valve installed it holds pressure. So I’m aiming towards the fuel pump check valve bad.
What are you doing to force more than one priming evolution? I’ve found that cold starts are still rock solid for me but warm starts are a bit weak and sometimes take a crank or 2 more. Being on E85 and a return system this is somewhat expected but I feel an extra priming evolution would help me out on warm starts.
I have a manual so I simply sit in the car and cycle the ignition/accessory button without my foot on the clutch. I can hear the pumps prime and shut off. I then turn the accessories off. And turn them back on. You have to wait a certain amount or it won't do it (it seems). In any case, it doesn't help. Once air pockets are in the lines, priming won't do anything, it's just cycling pressure and relief against a closed system. The only thing that will get them out is to either fire the motor and let the rails drink, or somehow adjust the pressure regulator allowing the voids past it and through the return (which isn't practical).
