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09-11-2015, 08:42 PM | #1 | |
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Join Date: Sep 2015
Location: Lenexa, Kansas
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E 350 6.8 Ltr misfire
I'm new here and this is my problem;
2003 E350 15passenger 6.8 Ltr gasoline V10 160K miles Symptoms: Hesitation/shudder under mild acceleration, intermittent rough idle. Consistently set code P0309 Plugs were changed at 150K miles so probably not the cause. Decided to "diagnose" by changing coils as :1 they were the easiest to change and :2 also cheapest. Started engine and cleared codes. Ran well for first 5 miles of roadtest in normal city traffic until a full throttle acceleration after which the rough running and hesitation returned, New code P0304 set. Kinda looks like whatever was causing the problem moved from #9 to #4 ? I'm anxious to hear any opinions regarding what my next step should be.
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Sorry 'bout that. Computerized cars just do that to me! I'm a 1932 model. |
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09-12-2015, 09:38 AM | #2 | |
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Re: E 350 6.8 Ltr misfire
If the code is following the coil when you swapped them I'd say it's the coil. Motorcraft #DG-508. I always seem to have a few around.
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09-12-2015, 06:32 PM | #3 | |
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Re: E 350 6.8 Ltr misfire
Thanks for your reply Delta;
I replaced all 10 coils with new ones. The original code showed misfire on #9. Didn't disturb the wiring, injectors or fuel rail but when I was finished a misfire showed up on cyl #4 (code 0304) as soon as I got on it hard about 5 miles into the test run. I'm thinking something may be floating around in the fuel rail but sure would like more information before I start down that road. Thanks again; Lliam
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