Question about 1988 Ford F 250

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88 Ford F 250 with 460 efi running too rich

When my 88 F 250 warms up it will start running rough and loosing power, you can smell it is running too much fuel through it.

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Check the o2 sensor, throttle body, vaccum lines, that timing and spark is correct and working on all cylinders( broken plug or wires), try the module on the distributor sometimes that can do it to but usally it runs good then gets bad as engine warms, to me is sounds like timing which also could be in the valvetrain or in the chain and gears in front... hopefully this gets you started in the right direction

Posted on Apr 20, 2009

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Going down the road at hwy speed it is back firing,can any one help

Posted on Jan 12, 2009

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Check all your vac lines first sound like you might have some leaks

Posted on Dec 14, 2008

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