Dropped cylinder

Tiny
RTHADCARR2
  • MEMBER
  • 1999 HONDA CIVIC
  • 4 CYL
  • 2WD
  • MANUAL
  • 180,000 MILES
My 1999 Civic LX cylinder 3 quit working. Good spark. Swapped injectors with cylinder #1 and Cylinder #3 still not funtioning. Measured 12.5 V to the injector clip and had continuity back the the ECU. Replacing ECU didn't help. What should I try next?
Saturday, March 26th, 2011 AT 2:33 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You need to determine what function has dropped out, ie, spark, injector pulse or compression.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

If both of those base, take a compression test.
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Saturday, March 26th, 2011 AT 3:09 PM

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