WHY IS TRUCK STILL BACKFIRING AND HARD TO START?

  • Tiny
  • cathy peck
  • 1993 Mitsubishi Mighty Max
  • 200 miles

Truck started running rough and backfired. Found bad spark plug wires. Replaced plug wires, spark plugs, cap and rotor. Now it still has backfire.

Sunday, April 22nd, 2012 AT 7:24 PM

1 Answer

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,305 posts

Check engine compression for a burnt valve.

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Sunday, April 22nd, 2012 AT 7:35 PM

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