Warm up symptoms - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 08-29-2010, 10:10 AM Thread Starter
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Warm up symptoms

I have an issue with my 1997 F250 7.3L that I would like to solve before the winter comes. It often takes a few cranks before it starts in the morning before going to work and lets out a bunch of white smoke. It idles fine but when I go to drive away it sputters and lets out a whole wack of white smoke and has little power. If i just sit there with my foot to the floor on the fuel it slowly revs up with a huge cloud of smoke then finally run fine. All the power is back and the smoke goes away. The smoke doesn't return until the next mornings start.
Lately the unburnt diesel smell has been hanging around longer than normal so I'm wondering if it is possible for the motor to be running a cylinder short? I am going to be replacing the UVC harness's. If they are warn is it possible that one of the injectors is not "firing"? I was thinking of doing all of the injectors O-rings and possibly replacing the HPOP.

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1997 Ford F250 HD Powerstroke 7.3L
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post #2 of 5 Old 08-29-2010, 09:13 PM
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Mine runs like pure hell in the morning. Turn the key on, wait about 20 seconds, kick it over, and wait for it to idle smooth. Then I just let it run about 5 minutes and go do something else before I get ready to go. It idles fine, but if I go to drive it before it's warmed up at least a little, it runs on 5 (maybe 6, couldn't tell you for sure) cylinders until you stop it and let it idle a little bit. It's bad...wants to die in granny if you aren't easy on it. Not sure why it does it...but if you let it warm up about 5 mins it runs just fine. Either bad compression, or bad injectors. I'm thinking the latter.
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post #3 of 5 Old 09-04-2010, 06:22 PM
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Ohm your glow plugs bet you have one or two bad ones or if they have never been changed and you are going to have the valve covers off may as well change them
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post #4 of 5 Old 09-04-2010, 06:31 PM
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FTR, I changed my fuel filter and drained the bowl and wiped it out...and it starts a lot easier in the mornings. I'll still be checking my glow plugs and putting in a Stancor relay and new batteries before it gets real cold.
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post #5 of 5 Old 09-04-2010, 06:33 PM
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If your under the VC, dont ohm em. REPLACE EM ALL. Saves you from having to go in it later from testing ok at first then died later.

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