m35a2 no start

[jimwc12]

I have lift pump pressure past the primary filter, but no pressure at the bleeder on the secondary filters. i can see the supply line goes into the bottom of the injector pump, then to the secondary filters? I am thinking of doing an FDC bypass, but i dont think that is why i have no fuel in the secondary filters. Is my problem in the booster pump? I guess i dont understand why the supply line goes into the bottom of the pump, then back out to the secondary filters? And yes, all 3 filters have been changed, and the lift pump is working.

 

[davidb56]

pull the fuel line off TO the secondary crank the engine and see if you have pressure there. if not, and you have pressure TO the booster pump, then the booster pump is the problem. I think maybe there is some kind of check valve or something within the secondary filters, so if you got fuel under pressure going to them, then your booster pump is fine. But I could be wrong about the check valve.

 

[jimwc12]

An update, I worked on it today, got fuel out of the bleeder on the secondary filters. It started up but ran away, I pulled the fuel cutoff and dumped the clutch and got it shut down before I heared any "evil noises". Back to the drawing board. What are common culprits of runaway on a multifuel?

 

[SCSG-G4]

FDC and the linkage in the throttle.