INTERMITTENT MISFIRE CODES, HELP!

  • Tiny
  • t avery
  • 1997 Kia Sportage
  • 13,300 miles

1997 Kia Sportage 4X4 2.0 is having intermittent misfire code PO302. Replaced wires, coil packs, spark plugs and camshaft sensor. Vehicle runs fine until parked for a short time. When restarted, it misfires again. What could it be?

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Saturday, October 15th, 2011 AT 8:45 PM

3 Replies

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

You need to check compression, plug, coil, vacuum leaks around the cylinder and lastly, the injector.

Roy

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Saturday, October 15th, 2011 AT 9:01 PM
  • Tiny
  • t avery
  • Member

Thank you for the info. What would be an inexpensive and back yard way to check the injectors?

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Monday, October 17th, 2011 AT 3:23 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

Remove the rail with all 4 attached and see if they hold fuel pressure with the key on.

With the rail away from the engine, crank the motor and see if they spray fuel in a nice pattern. The crank sensor signal is what triggers the injectors.

Roy

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Tuesday, October 18th, 2011 AT 4:02 AM

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