m1garand_man
New member
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- Ft Wainwright / AK
Sooo.
I have the newer engine in my truck now. I have gotten it to fire up (after I had to swap the lift pump out) and it will run for 3-5 minutes and then die on me and I cannot get it restarted until I re purge the system. I'll re purge the fuel filter first even though when I open up the top petcock fuel comes out under pressure. Then I'll take out all the glow plugs and crank the engine until fuel mist comes out of all the glow plug holes. I'll put the plugs back in and it will fire right up on the first try like normal. It will run great for about 3-5 minutes and then die and I cannot restart it until I repurge, as there will be no fuel getting to the injectors no matter how long I crank it for.
Now I know your first instinct would be to look at the injection pump. That’s what I did. The pump that came with the engine was leaking from the bottom of the pump housing from one of the bolts so I thought maybe it was sucking in air too. I replaced it yesterday with the recently rebuilt one from my bad engine. (It has only 3000 miles on it that I put on it myself) When I try to start the truck I still have the same problem.
I've gone back and re tightened all the hose clamps on all the rubber lines to no avail. The only thing I can guess is that the fuel filter base may be letting in air and once the bubble gets sucked into the pump it quits. The fuel filter and filter base assembly were bumped a couple of times (not hard) when the engine was put in. But I have eliminated everything else.
Also I think I have eliminated any possibility of electrical problems by testing the voltage of the pink fuel shut off solenoid wire the last time it died on me and found that it was getting 12v. The advance solenoid and high idle leads (the green ones) had no voltage not even when I recycled the ignition. Could this be to problem?
So I guess it comes down to two possibilities. Either it’s the fuel filter base that is leaking or it has something to do with the green advance/high idle leads having no voltage.
Since if I remember right the high idle solenoid will be energized along with the advance solenoid before the engine is even cranked. They must be working when the engine does successfully turn over but I haven’t verified that other than through the fact that the high idle solenoid does function correctly when the engine dose crank over.
If it is an electrical issue where can I look for a continuity issue? The schematics are a pain to work through.
Thanks
I have the newer engine in my truck now. I have gotten it to fire up (after I had to swap the lift pump out) and it will run for 3-5 minutes and then die on me and I cannot get it restarted until I re purge the system. I'll re purge the fuel filter first even though when I open up the top petcock fuel comes out under pressure. Then I'll take out all the glow plugs and crank the engine until fuel mist comes out of all the glow plug holes. I'll put the plugs back in and it will fire right up on the first try like normal. It will run great for about 3-5 minutes and then die and I cannot restart it until I repurge, as there will be no fuel getting to the injectors no matter how long I crank it for.
Now I know your first instinct would be to look at the injection pump. That’s what I did. The pump that came with the engine was leaking from the bottom of the pump housing from one of the bolts so I thought maybe it was sucking in air too. I replaced it yesterday with the recently rebuilt one from my bad engine. (It has only 3000 miles on it that I put on it myself) When I try to start the truck I still have the same problem.
I've gone back and re tightened all the hose clamps on all the rubber lines to no avail. The only thing I can guess is that the fuel filter base may be letting in air and once the bubble gets sucked into the pump it quits. The fuel filter and filter base assembly were bumped a couple of times (not hard) when the engine was put in. But I have eliminated everything else.
Also I think I have eliminated any possibility of electrical problems by testing the voltage of the pink fuel shut off solenoid wire the last time it died on me and found that it was getting 12v. The advance solenoid and high idle leads (the green ones) had no voltage not even when I recycled the ignition. Could this be to problem?
So I guess it comes down to two possibilities. Either it’s the fuel filter base that is leaking or it has something to do with the green advance/high idle leads having no voltage.
Since if I remember right the high idle solenoid will be energized along with the advance solenoid before the engine is even cranked. They must be working when the engine does successfully turn over but I haven’t verified that other than through the fact that the high idle solenoid does function correctly when the engine dose crank over.
If it is an electrical issue where can I look for a continuity issue? The schematics are a pain to work through.
Thanks