Caver Dave
Subterranean
I apologize for the "repeat" (for those of you on TDS), but thought I might possibly reach a new set of eyeballs here...
Recently, I pulled both tanks from my '92 F2504x4 w/ 7.3L & ZF5. After replacing them, I dumped about 3.5gals in each tank, drove to a local station (frequented by 99% of the independent truckers) and filled up. Drove about 100 miles without issue, then began suffering a power loss. Babied it home, and found quite a bit of water in the filter (the "water in fuel" light never pulled). I drained the water, dosed those tank fulls with DieselKleen and went on. Never have figured *where* the water came from... 10 local truckers using the same fuel swear they've had zero issues, so I'm guessing neighborhood hoodlums (potentially attempting to cover diesel theft by adding water?).
Last weekend, I pulled a 6k# load with it and all was great for 30-45 minutes (slight black smoke during WOT), then power went way down (unable to turn past 3K rpms & NO visible smoke)which turned into noticeable stumble & missing (whitish smoke at WOT) after an hour. Same symptoms on the return trip. Still no water in the oil, no oil in the water, and no additional water in the filter...
I was advised to check the lift pump *first* which I will do tomorrow, but was told it's likely the IP. I wondered if these symptoms lead you to think 1 over the other (lift vs IP)?
Also, why would it take so long to manifest? I can't see it taking 30-45 minutes for the entire block/IP to become completely "heat soaked" pulling a load in 90* temps for a heat/overheating issue (lift or inj. pump) to happen. I realize that internals will swell when hot, but the an mount of time seems to be too long?
As always, any insight you could give me is greatly appreciated!
Recently, I pulled both tanks from my '92 F2504x4 w/ 7.3L & ZF5. After replacing them, I dumped about 3.5gals in each tank, drove to a local station (frequented by 99% of the independent truckers) and filled up. Drove about 100 miles without issue, then began suffering a power loss. Babied it home, and found quite a bit of water in the filter (the "water in fuel" light never pulled). I drained the water, dosed those tank fulls with DieselKleen and went on. Never have figured *where* the water came from... 10 local truckers using the same fuel swear they've had zero issues, so I'm guessing neighborhood hoodlums (potentially attempting to cover diesel theft by adding water?).
Last weekend, I pulled a 6k# load with it and all was great for 30-45 minutes (slight black smoke during WOT), then power went way down (unable to turn past 3K rpms & NO visible smoke)which turned into noticeable stumble & missing (whitish smoke at WOT) after an hour. Same symptoms on the return trip. Still no water in the oil, no oil in the water, and no additional water in the filter...
I was advised to check the lift pump *first* which I will do tomorrow, but was told it's likely the IP. I wondered if these symptoms lead you to think 1 over the other (lift vs IP)?
Also, why would it take so long to manifest? I can't see it taking 30-45 minutes for the entire block/IP to become completely "heat soaked" pulling a load in 90* temps for a heat/overheating issue (lift or inj. pump) to happen. I realize that internals will swell when hot, but the an mount of time seems to be too long?
As always, any insight you could give me is greatly appreciated!