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F Series Forum covers questions and discussions regarding Ford F-150, Ford F-250, Ford F-350, Ford F-450, Ford F-550, Ford F-650, and Ford F-750.
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Old 11-11-2008, 07:09 PM
xf15 xf15 is offline
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97 Ford 4.2L V-6, 5 spd stick P0306

I'm getting the check engine light (P0306, misfire on #6 cyl) every time I'm running in the 1500- 2000 RPM range with very little load on engine. The engine doesn't miss, still gets 18 to 20 mpg........... runs perfect for 200,000 miles. I'm thinking that #6 cyl. is a little weak. It also uses about a pint of anti-freeze every 3months which has been going on for 10 years.

Last edited by xf15; 11-20-2008 at 05:41 PM.
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Old 11-14-2010, 07:15 PM
xf15 xf15 is offline
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Smile Re: 97 Ford 4.2L V-6, 5 spd stick P0306

FIXED.....took out the Champion spark plugs (heat range 14), replaced with autolite APP105 (heat range 5)
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