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Old 10-12-2006, 10:20 AM
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two cyclinders firing

1992 ford f150 5.0 #4 & #8 not firing. what could be problem?

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Old 10-12-2006, 11:33 AM
russlaferrera
 
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two cylinders not fireing

There is not enough info. What have you checked? How is the compression? Is there spark at these cylinders? russ
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Old 10-12-2006, 08:17 PM
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cyclinders are about 120 each. spark to both. tested injs. seem to be working. new plugs, rotor dist. cap ;and wires.
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Old 10-12-2006, 08:59 PM
russlaferrera
 
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two cyl not firing

Gave it some thought. The compression is fine. Good spark.

A guess would be an injector. I would try switching an injector with a known good firing cylinder. It's the one part you can't check without looking to see if it is clogged. russ
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