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1993 Buick Century Special 3.3L Excessive Emissions
Posted to GM Driveability on 11/29/2011 27 Replies

Hey guys,

Ok , ive got this 3.3l Buick with elevated nox at 15mph and [...] ASM here in CA. Around 1000PPM at both [...] catalyst test found less than 50 % reduction of [...] cat 2 times with aftermarkets , same results. Fuel pressure and volume withen spec. ...

27 Replies Received (View Replies)

  Related Documents & Media  1993 Buick Century Special

 
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car Vehicle Data

1993 Buick Century Special

VIN 1G4AG55N3P
Engine3.3 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFuel Injection / SEFI
EmissionsCA
SymptomsExcessive Emissions
OccursAlways
Message Closed w/FIX

car Vehicle Data

1993 Buick Century Special

VIN 1G4AG55N3P
Engine3.3 L / 6 cyl / GAS
Trans3-speed Automatic
DeliveryFuel Injection / SEFI
EmissionsCA
SymptomsExcessive Emissions
OccursAlways