Need help. Rough idle and white smoke - Ford Powerstroke Diesel Forum
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Old 09-24-2013, 04:44 PM
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Need help. Rough idle and white smoke

I know these two happen and can go together. I'm trying my best to help a buddy out and am at a loss. Have made progress...but can not find the culprit. He's got an '01 f350. It has 87k on the odometer. He bought it at a good price as a work truck as it has a dump bed, but had problems from the start. However...he figured I'd be able to get him goin. Starting with the original codes and tests...we have replaced the fuel pedal position sensor, icp, ipr, ohmed the uvc wiring harnesses and visually inspected them. It does have the grey cps. It has a new fuel and air filter and fresh oil change. It will start and lope like crazy with white smoke. None of these fixed that...but once it runs and warms up, there's no hesitation and will haul 3 ton of rock like its nothing. Changing the ipr actually made it worse but did eliminate the pressure above desired code. Now when idling rough the check engine comes and goes vs always being on. Give it a lil fuel and it goes away and dnt come back till u let off the accelerator until it warms up and stays off. It's throwing a p0603 and 01316 codes. So we have made progress but cannot figure it out. Any ideas? Anything to try? Black cps maybe?

Thanks in advance
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Old 09-26-2013, 04:45 AM
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Any thoughts?

Thnx
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Old 09-27-2013, 07:09 AM
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RE

Did you run a complete diagnostic?

Sensor pre check
KOEO
BUZZ results?
KOER
CCT results?

Is there oil in the connectors or are the icp, cps & ipr connections faulty?

1316 is a IDM code could mean bad IDM but I would check more into it
Take the idm out & shake it can you hear water in it? Are there any injector codes with the IDM code? Multiple injectors having problems on one bank such as 1357 or 2468 could indicate a bad idm.
The other code you have is a CPS code
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Old 10-01-2013, 04:19 PM
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Not real sure how to do those tests...but will look them up. Connections are oil free and dnt look faulty. Never had and still dnt have an injector code. Those are it now. Just does it on cold startups even on 70 and 80 degree days. As soon as it warms up...never a hesitation.

Thnx for reply.
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Old 10-01-2013, 09:34 PM
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White smoke that's smells like fuel will be oil burning. Truck only runs rough at start up will typically be glow plug related.

Check out the sticky regarding the GP system on the 7.3 general discussion.

Ohm out your pins on the valve cover wiring harness to see if the glow plugs are shot.

Even though the truck doesn't have many miles, the O-rings are still 12 yrs old.

Replace injector O-rings, glow plugs, and glow plug relay.

Sent from AutoGuide.com Free App
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