Quote:
Originally Posted by sbauerz28
The problem is when it starts it seems that the front cylinder isn't firing. There's a lot of white smoke out the exhaust. When it starts to warm up you can hear the front cylinder start to fire, or "come in". As it continues to warm up, it will continue to "come in" and "go out". After it warms up the front cylinder seems to fire ok and the white smoke clears up, but it will continue to miss at full throttle.
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It still does this even after you rebuilt the injectors correct?
Quote:
Originally Posted by sbauerz28
Just spent $250 the other week and had the injectors rebuild. It does run better, but it wasn't the main problem. Compression in all 3 cylinders is 375-400psi. When checking the valve lash the other night, I noticed that you can push the valves open with your fingers. Does this seem right?? I checked the engine manual I have for my D600 and it said spring pressure should be around 14 lbs. This just seems very light to me. I'm now leaning towards a valve float or valve hanging problem. If I can find a head gasket for this Japanese engine I may just pull the head to have a look.
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Spring pressure on these is very light. It's NOT floating a valve. Valve hanging up.... maybe. I'd say it's a valve issue, yes.
Quote:
Originally Posted by sbauerz28
My neighbor keeps telling me it's the injection pump, but it doesn't seem right to me. You can turn the pump up until it's rolling black smoke under any load. That tells me the pump has the ability to supply enough fuel. I should also mention it doesn't lose any coolant or run hot.
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You really don't know anything about diesels do you? Just because the pump has the ability to make that little motor "smoke" doesn't mean that it's putting the same amount of fuel out to all the cylinders. It could be starving the front one. If it has the injection pump on it I'm thinking of, it could have a scored barrel on one cylinder. Or the delivery valve could be bad, or the lobe worn off the cam in the pump.....
My guess is it's a valve issue, or a blown head gasket. You just think it has good compression on all 3 cylinders. If it's a blown head gasket, it could be pushing compression back and forth between the 1 and 2 cylinder. Not as likely though as I believe the firing order on a 3 cyl is 1-3-2. Could be a valve hanging up, or not sealing. Could be a scored cylinder. Could be the injection pump. Best thing to do would be a cylinder leak down test. That would tell you if your chasing issues internally, or fuel related. No harder than it is to pull the head, you may opt for that too.
My biggest advice to you, is don't play mechanic for other people if you don't know what your doing.