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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.
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Thursday, November 5th, 2015 AT 4:56 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 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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