Quote:
Originally Posted by ForcedInduction
Never use oil additives at any time.
Try putting the supply/return lines in a bottle of clean Diesel in the engine bay and see if that makes any difference.
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+1.. but first...
But first, replace both fuel filters. Maybe it is as simple as all your additives dissolving a bunch of crud, which has now washed into and plugged the fuel filters.
If that doesn't work, plumb a jug of fresh, clean diesel with no additives added in place of the feed line from the tank. Leave the return line as is so any additive-laden fuel can be flushed back into the tank. After the feed pump has pumped a quart or two of fresh diesel through the system, it should be flushed of any additive-laden diesel, and then you'll see what's what.
BTW, if the Heet you're talking about is the alcohol stuff, you may have harmed the injection pump -- I've heard water in the fuel is a fast way to ruin one, but never tried it myself. Alcohol-based Heet will help water mix into the fuel and thereby get into the IP.