1996 Chevy S-10 cylinder misfiring

  • 1 POST
  • 1996 CHEVROLET S-10

Engine Performance problem
1996 Chevy S-10 6 cyl Two Wheel Drive Automatic 205, 00 miles

I have a 1996 s10 blazer, 6 cyl, 4.3 ltr, 2 wheel drive, automatic, that has sat for about 2 and a half years. I have had some fun trying to get it to start, but after dropping the tank and inspecting the fuel pump I found the inner pump line was falling apart. With a new pump installed I figured my problems were over. Now it's running very rough and the check engine soon light keeps flasing. I put on the code reader and it says 2nd cylinder misfiring detected. I checked my manual for trouble shooting tips and checked the plugs. The #2 plug seemed fine and gapped fine. I then switched the #2 with #4 plug and reread the code reader, same thing, 2nd cylinder misfiring detected. Before I replaced the fuel pump, one of the first things I did was check the fuel injectors and cleaned them. When I reinstalled them the side clip on the #2 poppet broke off. The poppet still pops in but would this be the problem of the misfiring. I have already taken off the air intake plenum about three times and reinstalled so I would like to have your input before I start on my fourth time. Note that the vehicle was started up on a regular basis for the time it sat untill I decided to have it recommissioned. Please, any and all help welcome. THANK'S

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have the same problem?
Tuesday, March 10th, 2009 AT 7:26 PM

1 Reply

  • 77,149 POSTS

A misfire on a specific cylinder-check sparkplug/compression/injector

Misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

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Tuesday, March 10th, 2009 AT 7:44 PM

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