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 4 Dr Limited Sedan

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..........

1,395

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

1,395

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

Your Answer

Roadmaster

Looking for a Used Roadmaster in your area?

CarGurus has 57 nationwide Roadmaster listings and the tools to find you a great deal.

ZIP:

Buick Roadmaster Experts

  • #1
    DanR63
    Reputation
    500
  • #2
    Rowefast
    Reputation
    290
  • #3
    Tom Demyan
    Reputation
    240
View All

Related Models For Sale

Used Chevrolet Caprice
191 listings starting at $9,995
Used Chevrolet Impala
551 Great Deals out of 35,051 listings starting at $900
Used Buick Park Avenue
409 listings starting at $3,995
Used Chevrolet Camaro
397 Great Deals out of 30,566 listings starting at $2,495
Used Buick Regal
168 Great Deals out of 8,865 listings starting at $4,800
Used Cadillac DeVille
1,581 listings starting at $2,995
Used Buick LeSabre
16 Great Deals out of 1,779 listings starting at $750
Used Lincoln Town Car
40 Great Deals out of 1,745 listings starting at $1,000
Used Chevrolet Tahoe
696 Great Deals out of 41,238 listings starting at $1,995
Used Buick Riviera
117 listings
Used Ford Mustang
592 Great Deals out of 36,167 listings starting at $1,800
Used Buick Century
797 listings starting at $1,600
Used GMC Yukon
428 Great Deals out of 22,353 listings starting at $1,995

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.