misfiring

1985 CHEVROLET MONTE CARLO
V8 • 2WD • AUTOMATIC
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MONTECARLA85
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  • 3 POSTS
ive got misfires on cylinders 3 and 5 and its not the spark plugs, wires, or distributor.
Aug 15, 2011 at 7:55 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Did you check for spark at the plugs? You didn't say you had spark. Is fuel injected or carbed?
Aug 15, 2011 at 8:03 PM
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MONTECARLA85
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  • 3 POSTS
Yes, new spark plugs and wires, checked distributor cap and rotor. Yes, its carburated... I even replaced carb seal
Aug 15, 2011 at 9:00 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
I don't care if the spark plugs are new, did you check for spark at the plugs? Fuel--spark--compression, that is where I would start. Does the rotor turn when you crank it? Crank it a couple of times, see if there is any gas in the float bowl. With a rockchester carb, I can usually take the air horn off without removing the carb, to look in the float bowl.
Aug 15, 2011 at 9:16 PM
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MONTECARLA85
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  • 3 POSTS
actually i did say YES to plugs having spark... compressions fine ROCHESTER carb was just overhauled rotor turns so what now?
Aug 15, 2011 at 9:32 PM
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JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
When you work the linkage on the throttle, can you see gas squirt in the throttle bore? If you use a little starter fluid in the carb, will the engine try to hit? What about spark and valve timing?
Aug 16, 2011 at 4:30 PM
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