2000 e 150 4.2 misfire cylinder 6 P 0306 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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post #1 of 2 (permalink) Old 08-07-09, 04:47 PM Thread Starter
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2000 e 150 4.2 misfire cylinder 6 P 0306

About ready for cash for clunkers.
Van has 107,000 miles and code listed above.
Have changed wires, plugs, coil pack, injector all with oem parts. Also changes all vacuum hoses, o2 sensors, pcv valve & a couple of other things I can't even remember. Compression is fine on all cylinders.
When first starts, runs great for about a minute then runs rough. Check engine light comes on & won't pass inspection.
Hate to take to Ford dealer because they are just going to do the same things.

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post #2 of 2 (permalink) Old 08-14-09, 02:48 PM
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Re: 2000 e 150 4.2 misfire cylinder 6 P 0306

Well, a couple possibilities that I can think of is a bad/about-to-die cat converter, or you have a faulty fuel injector (which you said you replaced; I'm guessing on all cylinders). In any case, once the fuel tank gets low, add a couple fuel injector cleaners and throw in five gallons of 89 octane with it. Run it until it gets low and then fill with whatever unleaded fuel you want.

Second, I'd get the fuel pump tested and if there is an inline fuel filter, be sure to have it replaced.

I'm also assuming the new spark plugs were gaped correctly.

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