Quote:
Originally Posted by barry12345
Test worth the effort? Start the engine on vegatable oil. Get it warmed up and shut down. Restarts easily the viscosity of the hot vegatable oil remains higher than hot diesel fuel. Many ex WVO burners had this problem when put back on diesel fuel in the day.Cooling down the injection pump with water is not recommended.
Also although I do not think it is your case. Excessive engine blowby will shut down the injection pump. At hot idle engine should not launch a loose oil filler cap.
Could also be an obstructed crankase breathing system. You could also be building vacuum in the fuel tank with a blocked tank vent hose. Leave the fuel cap off to test for this. It is probably the injection pump but you want to make sure.
Poster already mentioned about the bad ignition switch valve. Most are long shots but takes no time to clear them.
At least you know what you are doing.In the day young fellows would burn WVO and when the problems started would ask for help. The problem was most of them at best had only changed a flat tire. That was about the total extent of their mechanical experience on cars.
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The oil cap barely wiggles at hot idle when loose (although it is leaking oil at the cap).. but no pressure behind it. Crank case vent seems fine.
Another thing to keep in mind is that it will not start at all unless the pedal is pushed. Does not produce enough fuel to fire. Acts as if it isn't getting any fuel at all. No smoke.. nothing. Hits nearly instantly when cold if the pedal is held down. Let off the pedal and it drops to an idle.
As the engine warms up... it struggles to restart. The warmer it gets... the worse the problem gets until it wont start at all. Acts just like its not getting fuel. (I had seen a few threads on this issue from WVO users which leads me to think I need to swap the pump)
I did snag a used pump. It'll be here sometime this week. If the simple things don't pan out, I'll swap it. 200k mile pump with a 90day warranty for $100. Figured it was worth the cost.
I'll still give the easy stuff a shot... but will likely change the pump considering how disgusting the delivery valves were. I don't mind the effort and at least it eliminates a big question mark.