MY 3AMP4 CYLINDER ARENT FIRING WHY COULD THIS BE...

  • Tiny
  • driftkiller101
  • 1995 Mitsubishi Eclipse
  • 195,500 miles

My 3& 4 cylinder arent firing why could this be ive already replaced the coil pack, spark plugs, spark plug wires, fuel pump, I just seem to cant figure out what could be causeing this

Monday, November 12th, 2012 AT 8:56 PM

3 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

Check the engine compression.
Check for vacuum leakages.
Do you have coolant losses and overheating issues?

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Tuesday, November 13th, 2012 AT 3:30 PM
  • Tiny
  • driftkiller101
  • Member

All good except it has a low compression on the 4th cylinder, I was guessin that the injectors are clogged or just the ecu isnt telling them to spray

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Friday, November 16th, 2012 AT 12:12 AM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

Low compression can result in misfiring. How much lower than others?

Guessing can be a waste of time and money. Test them to confirm. Try swapping the injectors.

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Friday, November 16th, 2012 AT 11:30 AM

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