Loosing My MIND
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
This is a wild hair idea, but what about a flaky ground connection? You mention this is a salt spreader so I'm guessing there is a lot of corrosion on this 25 year old truck. What I'm wondering is if the salt has invaded the wiring harness and/or the battery connections to the point where all these components can pass electrical tests as long as the starter load isn't a factor. But hit that starter and it's demand takes over, basically blocking any sort of good ground connection that the electronics require for good function because of all the amps trying to find the easiest path to ground.
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Battery voltage should drop into the 11.0-11.2 range with the GP relay lit, and then momentarily even lower than that when you hit the stater.
how about plugging it in? Somebody asked but I didn’t see that one ever addressed. Easy troubleshoot to try.
IPR nut isn’t loose? The IPR readings could be a clue and might be suspicious. If the HPOP res is full I wouldn’t suspect the LPOP, and sounds like you already troubleshot the HPOP pressure being good so I’m going to guess the oil pumps aren’t the problem and seems like they usually never are on these engines. They gradually lose PSI performance as they wear but usually the engine still runs.
What about the fuel bowl fuse? Anybody think of that one?
how about plugging it in? Somebody asked but I didn’t see that one ever addressed. Easy troubleshoot to try.
IPR nut isn’t loose? The IPR readings could be a clue and might be suspicious. If the HPOP res is full I wouldn’t suspect the LPOP, and sounds like you already troubleshot the HPOP pressure being good so I’m going to guess the oil pumps aren’t the problem and seems like they usually never are on these engines. They gradually lose PSI performance as they wear but usually the engine still runs.
What about the fuel bowl fuse? Anybody think of that one?
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Joined: Dec 2018
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if he confirmed the fuel bowl is refilling itself I would guess not. Mine would start and idle just fine with no pump pressure at all…until the fuel bowl ran dry of course. Now give it any throttle and it would totally bog down and stumble with no pressure.
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