7.3 white smoke on every start - Ford Powerstroke Diesel Forum
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Old 03-26-2012, 09:37 AM
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Angry 7.3 white smoke on every start

I have an early 99 7.3 psd stage one 160cc injectors and custom tuned sixnpos chip. I just replaced the engine in with a 01 engine I had the white smoking problem before replacement, but I thought it was just the burning oil. Previously I have put on an hoop and new injectors that are still under warranty... When changing engine I changed all injector o rings....it doesn't matter if it's 25 or 75 degrees outside my truck smokes on start up and when you idle or barely going after engine installation it was not using oil or coolant will check oil again but doesn't smell like burning oil smells like raw fuel other than a trashed injector are there any other possible problems I may be having... Any advice would be greatly appeeciated
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Old 03-26-2012, 09:09 PM
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White smoke at startup is usually unburned fuel, maybe you have 1 or 2 glow plugs out, or a loose UVC harness or connectors at the glow plugs. Does it also blow white smoke if you shut it off, then restart it hot (ie, all the cyl's are warmed up, so it fires on all 8 right away)
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Old 03-27-2012, 07:11 AM
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Yeah it smokes some even when warm
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Old 03-28-2012, 04:01 PM
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I'm out of ideas, then. last longshot I could think of would be lack of fuel pressure, or low high pressure oil, so you have an injection cycle, but with such poor atomization that it doesn't light the fuel off untill a couple other cyls fire and the rpms come up a bit
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