WHY DO ENGINE HAVE A MISFIRE ON #5 CYLINDER?

1996 Chevrolet Silverado

Tiny

joe1953

July, 5, 2012 AT 4:51 AM

I took #5 spark plug out and it had Light brown deposits encrusted on the side or center electrodes or both so I put another spark plug in and it still misfire at idle, the wires or good, have 195 pound compression on #5 cylinder.

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Engine Miss

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10 Answers

Tiny

rasmataz

July, 5, 2012 AT 5:11 AM

Inspect and test the no.5 injector-Also refer to this misfire link:
http://www.2carpros.com/articles/engine-misfires-or-runs-rough

Tiny

rasmataz

July, 5, 2012 AT 5:21 AM

No.5 compression is bit too high -could be carboned build-up on that cylinder

Tiny

joe1953

July, 5, 2012 AT 5:45 AM

I haven't found any injector on this engine, where or the injector Located? This engine do have a Throttle Body.

Tiny

joe1953

July, 5, 2012 AT 6:05 AM

What cause carboned build-up on no.5 cylinder, and how can I fit it?

Tiny

mhpautos

July, 5, 2012 AT 7:11 AM

A faulty injector will cause this, you can get them sonically cleaned and flow tested it may be a good idea to have them serviced as the mileage is up there now. The money saved on fuel will pay for the job in no time.

Tiny

rasmataz

July, 5, 2012 AT 10:33 AM

Oil in cylinder -Recheck the compression on no.5 I could be wrong on the compression specs-if it is use a decarbonizer-the reason I've mention carbon is your mileage

Tiny

joe1953

July, 5, 2012 AT 5:14 PM

Where or the injector Located on this engine? I found the Throttle body.

Tiny

rasmataz

July, 5, 2012 AT 9:45 PM

The injector is within the throttle body

Tiny

joe1953

July, 6, 2012 AT 1:09 AM

How many injector this engine have? What store do I but the decarbonizer?

Tiny

rasmataz

July, 6, 2012 AT 2:35 AM

Dunno if it has one or two injector-check on it while at Autozone or Napa and also for the decarbonzer

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