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Ford code 303 1998 6cyl e250

Engine code 303 will not go out

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Is the van running rough at idle? Does it seems to have a slight miss as you accel? What kind of mileage do you have. Ford 4.2L with high mileage could have EGR ports that are clogged in the lower intake. Unplug the EGR vacuum line and see if the misfire goes away ( 303 is a cylinder #3 misfire code )

Posted on Jan 23, 2013

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