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Posted by David Sherman [24.32.202.83] on Thursday, March 04, 2010 at 01:24:05 :
In Reply to: Geez, when I got my M109, had a broken valve spring posted by Chriscase [76.201.18.18] on Thursday, March 04, 2010 at 01:04:03 :
No, I quit fighting it 2 years ago. I was fighting it for 2 years before that. Yes I've loosened injector lines many times. As I recall, that's another reason I think the timing is all screwed up; it's not real clear from loosening them which is really firing or not. Sometimes loosening one makes it run worse, sometimes not. I think it's running about like it would if I had one injector spraying fuel continually into the intake. Timing is almost irrelevant. Valve can't be tight because they were marginally loose in their guides when I had them ground, and I think some of the guides had already been knurled. I got a diesel compression tester set but never used it because none of the adapter were right. I made an adapter to replace a glow plug, but it and the diesel compression gauge were in a box of tools that were stolen out of my pickup. That was about when I got disgusted with the whole thing. Injector lines mixed up is what it sure sounds like, but the lines are very rigid and don't look like anybody's monkeyed with them and gotten them mixed up. They'll only go one way. Plus I double-checked it with the shop manual. Checking the heat of the exhausts is a good idea. Maybe I'll try that if I fire it up again. If only two are hot and I turn the pump around and the other two are hot, I'll re-do the injector lines some way or other to make it right. But if there's no difference in the heat either way, I'll know they're all only partially firing. If it was a gas engine I could put the timing light on each plug wire and see when they're firing or I could look inside the distributor and see where the rotor is pointing. I may have to get this old JD backhoe running now that my D4 cat is dead-lined with a stuck steering clutch. Or buy a mule and a road scraper.