Rebuilt 7.3l (after oil pan reseal) now rough running - Ford Powerstroke Diesel Forum
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Old 12-23-2011, 05:06 AM
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Exclamation Rebuilt 7.3l (after oil pan reseal) now rough running

Ok so I just finished helping a friend pull his 2002 F-250 7.3l with the intent of resealing his oil pan that had a severe leak as well as replacing a main seal. Once we got into it we ended up replacing a ton of stuff because he felt that since we had the engine out we "might as well". We replaces all the glow plugs, injector seals, head gaskets as well as all the other gaskets that came in the felpro kit, exhaust manifolds, and a few other minor things.

We totally stripped the engine down to get it out of the truck and now after installing the new parts, fixing the oil pan, and reinstalling the engine we've got it started but it runs like crap!

The initial start sounded good as well as the idle, but when I took it on a test drive it sounds like its missing, its running very rough, and there is now power...

We have a small exhaust leak where the downpipes connect from the turbo to the headers, but that's not a new problem.

Any clue what could be the issue here? When the engine was pulled it was running fine (minus the oil pan issue), but now we've got no power and rough idling. Could we have some wires crossed?

Any and all suggestions would be greatly appreciated!


Thank you!
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Old 12-23-2011, 05:41 AM
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How long have you run it? Could there still be some air in the Fuel Rails?

Did you replace the Valve Cover gaskets with the UVCH plugs in it?

Got access to a good scanner?
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Old 12-23-2011, 07:12 AM
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Some other things to check:
Injector Cups (if you smell / see diesel in your coolant, = leaking injector cups)
IC Tubes connected / sealed correctly
Air in lines (as mentioned)
High pressure oil pump (reservoir oil level)
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Old 12-23-2011, 06:20 PM
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it takes about 7-15 miles to get all the air out,also did you resurface you heads,if not you could be loosing compression
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