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chevy belair has a miss, running rough
have a 1953 chevy belair with a 235 engine , the engine has a miss ,running rough, was runing smooth last week , changed the gas filter , changed the spark plugs, can anybody give me some ideas thanks
posted: June 11, 2013
  Answers (10)
possibly a bad plug wire they are made with a graffite center that will brake if pulled hard enough to stretch the wire
posted:  June 11, 2013
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try putting in some dry gas, might have bought some gas with water in it. pull distubutor cap, is points pitted, is the under side of the cap have a carbon track. Try an wiggle the distubutor shaft, if it moves back an forth replace the dist. Loosen the spark plug wires start the eng, pull each wire off the spark plug does the eng die down. If so the wire is good, if not the wire or a compresion problem. Crab the fuel line, an try to wiggle the top of the carb if it moves take the carb off and tighten the screws. Does the battery pass a battery test. Check the charging. Take some carb cleaner and spray the bottom of the carb where it bolts to the intake if the eng speed rasies than the gasket is leaking replace it. Spray the intake where it bolts to the head, if the idle speed rasies replace the intake gasket. Did you do some eng work to it, just before this happened then go back an check your work.
posted:  June 12, 2013
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hi,i have to put my 2 cents in here....glad a gentleman typed out most of my answer for me in a earlier answer...ALSO CHECK your air/fuel ratio...turn it out 1 turn and see if it smooths out.i had a person who had this engine in his truck.he changed everything and all that was wrong with it was that it had a lean miss....hope im not insulting you..the picture looks like your on top of things...kelly
posted:  June 13, 2013
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hi again...also check that your ballast resistor connections are tight and its not burnt...k
posted:  June 13, 2013
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Check the distributor cap for cracks. Have you changed the spark plug wires, points, condenser & rotor?
posted:  June 13, 2013
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Forgot to mention, check coil wire....
posted:  June 13, 2013
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Don't forget to check all your vacuum lines. They may be split, loose or have come unattached.
posted:  June 13, 2013
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Bad plugs mabey?
posted:  June 16, 2013
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Sorry,i didn't read your whole question. you did change the plugs
posted:  July 20, 2013
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Since you just changed the plugs, it may be a loose or broken plug wire. Have also seen spark plugs broken when installing. These old 235 will run on 5 cylinders, so try pulling each plug wire in turn when it is running. Or even better, have a buddy do it so you do not get shocked. Should not take long to figure out which cylinder is not firing all of the time.
posted:  August 5, 2013
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