suddenly runs rough and engine lite came on.

1994 FORD EXPLORER
90,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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JLCASE
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  • 1 POST
truck suddenly runs rough and engine lite came on. changed mass airflow sensor, no help. older code scanner will not connect to truck. Smell of gas at tail pipe running rich. Any suggestions ????
Aug 5, 2015 at 10:01 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,414 POSTS
Running rough is the typical sign of a misfire, usually spark-related. Diagnostic fault codes won't tell you which cylinder(s) are misfiring on a '95 and older vehicle. If you can't read the fault codes, start with the basics; spark plugs and wires.
Aug 5, 2015 at 11:00 AM
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