2003 Ford F150 engine misses at 1800 rpm

2003 FORD F-150
19,000 MILES • V8 • 4WD • AUTOMATIC
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MARK.D.BLACKFORD
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I have diagnosed with OBE ll scanner and found 4& 7 coils bad replaced, put in new coils & replaced plugs. code went out engine still misses, took compression test at same time i put in plugs, no code comes up now but still misses, now dome light ringer goes off when door is open and keys removed. took to repair shop and they pulled 9 different codes. have to have bad wiring harness or bad ground. but where do start troubleshooting?
Mar 27, 2010 at 2:19 PM
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