1997 Ford Ranger Cylinder no 4

Tiny
JIM RUSAK
  • MEMBER
  • 1997 FORD RANGER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 129,200 MILES
Bought this truck used about 2 years ago. Changed plugs and plug wires do to an engine miss and all was good. Year later miss came back, engine code " mis fire no 4 cylinder". Changed plug, miss corrected. Year later same thing. Had to replace only No 4 plug to correct engine miss.
Any idea what could be causing this. Plug looks good when I pull it. Doesn't look fouled.
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Thursday, May 21st, 2009 AT 9:03 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
IT could be caused by a weak coil or injector.
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Thursday, May 21st, 2009 AT 11:36 AM

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