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1997 Buick Century Limited 3.1L Hesitation, Surge, Cuts out, Stall, Misfire
Posted to GM Driveability on 6/30/2010 18 Replies

Good afternoon all. I've got me a little gem that has reduced me to throwing parts at it. What it's doing is it bucks and backfires when moderate throttle is applied and then it'll do it at very little throttle and somtimes at idle. Then it becomes grey diffic...

FIX posted 7/1/2010

18 Replies Received (View Replies)

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car Vehicle Data

1997 Buick Century Limited

Engine3.1 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsHesitation, Surge, Cuts Out, Stall, Misfire
OccursHot, Under Load

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)