tiresandals
SILVER Star
After doing some fuel system work I was driving my LJ78 and it just stopped. Enough fuel. Injectors are dialed in and getting fuel. I don't think that was the issue. So I looked a little more closely.
I found that a fusible link was burnt out. The link ran to the glowplug relay (orange arrow). I found that the glowplugs I had installed were slightly shorter (my 1/8th inch or so) and allowed the glowplug strap to short against the metal diesel return system (blue arrow).
I replaced the portion of the fusible link that was blown and adjusted the strap so that there was no longer a short. I checked again to make sure it was getting fuel and the battery had a full charge. It still wouldn't start.
Then I replaced the glowplugs with new ones and it started immediately. I let the engine idle for several minutes. Then it stopped and won't start again (exactly as before). This is about the same length of time that it ran before stopping last time. Clearly I found and fixed part of the problem, but something else is still going on... I have a sense that there is some additional short or something that is causing the glowplugs to malfunction. I checked the clearance and connection on the glowplug strap. Its in a good position, clear of any grounding metal.
I checked the glowplugs that I removed and they all test about 1 - 2 ohms. I think this means they are good.
I'd appreciate your advise troubleshooting this problem.
I found that a fusible link was burnt out. The link ran to the glowplug relay (orange arrow). I found that the glowplugs I had installed were slightly shorter (my 1/8th inch or so) and allowed the glowplug strap to short against the metal diesel return system (blue arrow).
I replaced the portion of the fusible link that was blown and adjusted the strap so that there was no longer a short. I checked again to make sure it was getting fuel and the battery had a full charge. It still wouldn't start.
Then I replaced the glowplugs with new ones and it started immediately. I let the engine idle for several minutes. Then it stopped and won't start again (exactly as before). This is about the same length of time that it ran before stopping last time. Clearly I found and fixed part of the problem, but something else is still going on... I have a sense that there is some additional short or something that is causing the glowplugs to malfunction. I checked the clearance and connection on the glowplug strap. Its in a good position, clear of any grounding metal.
I checked the glowplugs that I removed and they all test about 1 - 2 ohms. I think this means they are good.
I'd appreciate your advise troubleshooting this problem.