Rough idle with a miss. Check engine light is intermittent

Tiny
VLISH
  • MEMBER
  • 1991 DODGE SPIRIT
  • 3.0L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
Check engine light comes on sporadic. When off runs good. Now it is running rough with a miss. Replaced plugs, plug wires, distributor cap, rotor, alternator and ignition coil. Planning on changing pcv valve. Was told could be oxygen sensor, crank sensor or even egr.
Thursday, November 5th, 2015 AT 4:56 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 34,331 POSTS
Rather than guess and waste money on a lot of random parts, read and record the diagnostic fault codes. Those will indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition.
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Thursday, November 5th, 2015 AT 7:36 PM

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