bad idm???? - Ford Powerstroke Diesel Forum
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Old 01-30-2009, 07:11 AM
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bad idm????

right now my truck has 175,000 miles and when i bought it had 140,000. i've replace the cps, icp, ipr, and hpop. a diesel shop told me to try the ipr and hpop when they found no codes. they said i had good oil pressure, good fuel pressure, and good boost. frustrated, i pulled the valve covers, and installed the clips on the uvch. they were a little loose, injectors are spitting oil. the truck runs way smoother, but i still have a unusually loud diesel knock when driving. very audible from inside the cab, drivers side. goes away when i'm coasting or idling. the idle drops down and then bounces back up to normal when clutch is engaged. the truck seems to run like it is cold all the time. the motor seems way louder all around than when i first got it, and still isn't running like it should. my truck doesn't seem to give codes. ? I was wondering if running my truck with loose uvch if that would mess up the idm or anything like that. I have a OTC monitor 4000 scanner and i get nothing. I use my truck for my business and would like to clear this up before spring when i need it everyday. any suggestions would help.
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Old 01-30-2009, 07:29 AM
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Idm, uvch, ect, would throw codes like crazy. I don't know if the OTC will properly pull codes on a powerstroke. I would find a different shop that has a minimum of a MT2500 or better scanner.
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Old 01-30-2009, 07:32 AM
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sounds to me like a fuel pressure test is in order on this truck, no codes always leads me toward fuel, and low fuel pressure can cause a audible knock
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Old 01-30-2009, 07:39 AM
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would a weak fuel pump whine at the first start of the day??? I noticed in fifth gear at 45 mph or 1300 rpms it has no pickup at all and i have to downshift just to speed up.
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Old 01-30-2009, 07:42 AM
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its cold here but something is whinning for a minute or two
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Old 01-30-2009, 07:46 AM
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Low fuel pressure will cause low performance under load at higher speeds. Contact Replacement O-rings for Diesel Engines They have a Schrader valve setup for the 7.3 now.
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Old 01-30-2009, 11:36 AM
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fuel pressure is good. 62 psi at idle. i have a humming noise coming from my air intake, is that normal??
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Old 01-30-2009, 12:28 PM
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or... does powerstrokes just make crappy, unbearable noises just for the fun of it??
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Old 01-30-2009, 12:44 PM
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INTERNATIONAL = JOKE
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