Question about 1993 Ford F250

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It idles rough and smokes sometimes, it will die when you put it park, but sometime it will idle normal and not smoke, it runs good on the hwy although, I put a o2 sensor today but didn't help. It seems to use more gas when it is smoking alot.

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  • kws100 Jun 25, 2009

    Checked the EGR valve, its working ok not stopped up....... all so the pvc valve is ok....



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  • 434 Answers

Sounds like it may have a bad EGR valve, or no vaccum to it

Posted on Jun 24, 2009

  • Mike Phillippi Jun 26, 2009

    When was the last tune up?



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My toy runs good nothing blown but it smokes white smoke sometimes when i stop at a traffic light and go or sometimes when its just idleing. thanyou

white smoke is normally water in the combustion process
have a compression test done to check for head leaks (corrosion)
have a cooling system pressure test done

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Why sometime pleinty white smoke came out of exaust

White Smoke...
1. Typically normal condensation in the exhaust system converting to steam once engine is running and producing heat creates white smoke. Typically this lasts only a short period of time until condensation water in the exhaust system is gone.

2. If there is a problem, persistent white exhaust could be an indication of a water leak into the cylinders (e.g. cracked head or leaking head gasket. The good news is, this second case will normally will occur with other problems (e.g. consistent rough idle, or rough engine vibration at specific RPMs). If this is suspect, keep an eye on the oil with the dip stick and during next oil change (If any of the oil appears WHITE, there is a problem.). If this is a suspect problem, a test for the DIY'r mechanic would be to remove all the spark plugs, have another person turn the engine over, and watch for water mist to spray out of one or more cylinders.

Because you said sometimes, this sounds like normal condition.

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