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7.3 is not idleing corectly - 1993 Ford F250

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You may have an injector stopping up. is it super cold where you're at? the fuel may be trying to gel up. if cold,run anti-gel with fuel but follow instructions to the letter with anti-gel as if too much with fuel,can burn hole in top of a piston.if not cold,add a small ammount of transmission fluid to your fuel to lube the fuel injectors,small ammount is 1/4 of a quart to 20 gallons of deisel fuel.7.3 are funny at times it may smoke just a little at first but will adapt.have worked on 7.3 alot in marine corps great motors thank you for choosing

Posted on Dec 31, 2010

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