1986 Ford F150 engine bucks

1986 FORD F-150
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THERABBITT
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Engine Performance problem
1986 Ford F150 V8 Two Wheel Drive Automatic

the engine bucks between 40 to 45 mph
if you go into passing gear it doesn,t do it
Oct 5, 2009 at 4:12 PM
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JACOBANDNICKOLAS
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Has the check engine light come on? Also, have you checked for vacuum leaks?
Oct 6, 2009 at 1:36 PM