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

45

Asked by 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

45

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.

45

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..........

1,475

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

1,475

Also is it possible that the spark plug wires are crossed?

Your Answer

Roadmaster

Looking for a Used Roadmaster in your area?

CarGurus has 47 nationwide Roadmaster listings and the tools to find you a great deal.

ZIP:

Buick Roadmaster Experts

  • #1
    DanR63
    Reputation
    510
  • #2
    Rowefast
    Reputation
    290
  • #3
    Tom Demyan
    Reputation
    240
View All

Related Models For Sale

Used Chevrolet Caprice
126 listings starting at $1,350
Used Chevrolet Impala
397 Great Deals out of 25,595 listings starting at $799
Used Cadillac DeVille
1,272 listings starting at $1,988
Used Chevrolet Suburban
382 Great Deals out of 22,381 listings starting at $1,132
Used Chevrolet Tahoe
527 Great Deals out of 36,655 listings starting at $1,375
Used Lincoln Town Car
24 Great Deals out of 1,358 listings starting at $1,995
Used Buick LeSabre
1,238 listings starting at $686
Used Ford Crown Victoria
710 listings starting at $1,700
Used Buick Park Avenue
292 listings starting at $1,988
Used Buick Riviera
93 listings
Used Mercury Grand Marquis
19 Great Deals out of 1,192 listings starting at $1,200
Used Land Rover Range Rover
74 Great Deals out of 5,053 listings starting at $2,850

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.