1996 BUICK ROADMSTER GETTING THESE CODES I JUST INSTALLED NEW CAP ROTOR AND DISTRIBUTOR

65

Asked by boothkennels Apr 16, 2012 at 08:39 AM about the 1996 Buick Roadmaster Limited Sedan RWD

Question type: Maintenance & Repair

I JUST HAD A MECHANIC INSTALL NEW CAP ROTOR AND DISTRIBUTOR,IT WAS BAD I SAW IT FOR MYSELF.BUT NOW ENGINES IDLES HIGH THEN GETS NORMAL BUT IS MISSING.I TOOK IT TO AUTO ZONE AND I GOT THESE CODES P0430 AND P0420.ENGINE CRANKS ON A DIME,BUT I AM QUESTIONING DID THE MECHANIC SET THE TIMING RIGHT.CAR IS NOT LOSING POWER BUT JUST DOESN'T RUN RIGHT.WHEN I UNPLUG THE AIR IDLE CONTROL VALVE CAR RUNS HIGH IDLE BUT DOES NOT MISSES.CAN ANYBODY GIVE ME AN IDEA OF WHAT THIS CAN BE.

4 Answers
65

Michael answered 12 years ago

Catalyst inefficiency codes. o2 sensors could be bad. Could have an exhaust leak causing the o2 sensors to give a false reading. Your timing should be fine.

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65

boothkennels answered 12 years ago

i put in new spark plugs today and saw a little oil around the threads,so now im thinking maybe my rings are leaking or something but there is no smoke coming from my taiplipe.ANY IDEAS..........

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3,115

Mike answered 12 years ago

Catalyst efficiency codes could also mean a bad converter. If the converter is clogged it could cause a low rpm issue.

Mark helpful

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