[Vwdiesel] More Quantum Questions

[William J Toensing]

My Quantum still has me stumped. I let it set for several months, went out to start it & it fired right up when I wanted to demonstrate its starting problem. Yesterday, I wanted to get into the garage where I keep the Quantum & it started right up. I moved it out of the garage & turned it off. I let it sit for several hours, went to start it & it wouldn't start. I decided I would get it back in the garage by first putting it in reverse, let the clutch out & then used the starter to move it & it started. Got it back in the garage, turned it off & again tried to restart it & it wouldn't start. When it does start it sounds like the IP is advanced a little to much.

To refresh you on what I have done, I replaced the head gasket after having the head surfaced & the valves ground in a machine shop. I had the IP rebuilt. Installed new glow plugs, replaced the fuel shut off solenoid, wired up a relay to the fuel solenoid so it would get electricity directly from the battery.  It is as if heat generated in the engine compartment causes a "vapor lock" which shouldn't happen with diesel fuel. Could the fuel shut off solenoid stick in the off position when it gets hot? Any other ideas for trouble shooting my Quantum? 

Bill Toensing, Nevada City, CA.