Question about 2004 Ford F350

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Backfire at idle. no power can not drive

Starts and pops thru throttle plate at idle. try to drive and no power, can barely move it

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If this is a "Cam Phaser" style engine, it may be the problem. Engines of this type used a part that adjusts the timing on each half or bank of the motor. When a "cam Phaser " sticks out of position, one side of the motor is timed different than the other.

Look up articles about your motor by size. The 2004-2008 years were bad for this problem and there were recalls with limits.

Posted on Jan 03, 2015


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Posted on Jan 02, 2017

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SOURCE: intermittent problem. Truck ran fine

Check for sticking idle air control valve and stuck open EGR valve. Both are common causes for very rough engine operation due to fuel-air ratio being too far off. Also check for large vacuum leak such as from rubber hoses connecting PCV valve to intake. Feel around for squishy or oily rubber which would indicate a leaking hole in the rubber hoses.

Posted on Sep 28, 2010

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SOURCE: 1994 ranger 4 cyl. - idles ok but under load, truck bogs done and lacks power

Try checking the fuel filter or the fuel pump.

Posted on Aug 02, 2012

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