Anything that interferes with the MAP sensor's ability to monitor the pressure differential may upset the fuel mixture and ignition timing. This includes a problem with the MAP sensor itself and grounds or opens in the sensor wiring circuit. Typical driveability symptoms that may be MAP related include surging rough idle a rich fuel condition detonation due to too much spark advance and a lean fuel ratio or loss of power and/or fuel economy due to retarded timing and an excessively rich fuel ratio. Eliminate these issues with a new OEM replacement quality MAP sensor. ** Factory Replacement Part that Meets or Exceeds Original Manufacturer Specifications for the Vehicles Listed.BUICK CENTURY 1982-2004BUICK ELECTRA 1985BUICK ELECTRA ESTATE WAGON 1988-1989BUICK ESTATE WAGON 1990BUICK LESABRE ESTATE WAGON 1988-1989BUICK REGAL 1985-1996BUICK RENDEZVOUS 2002-2003BUICK RIVIERA 1985BUICK ROADMASTER 1991-1996BUICK SKYHAWK 1982-1989BUICK SKYHAWK (CAN) 1983-1984BUICK SKYLARK 1982-1998BUICK SOMERSET 1987BUICK SOMERSET REGAL 1985-1986CADILLAC BROUGHAM 1990-1992CADILLAC CIMARRON 1983-1988CADILLAC DEVILLE 1985CADILLAC ELDORADO 1985CADILLAC FLEETWOOD 1993-1996CADILLAC FLEETWOOOD BROUGHAM (FWD) 1985CADILLAC FLEETWOOD BROUGHAM (RWD) 1985-1990CADILLAC SEVILLE 1985CHEVROLET ASTRO VAN 1985-1994CHEVROLET BERETTA 1987-1996CHEVROLET BERETTA GTZ 1993CHEVROLET BLAZER 4x2 1987CHEVROLET BLAZER 4x4 1988-1994CHEVROLET BLAZER S10 / T10 1985-1994CHEVROLET CAMARO 1982-1995CHEVROLET CAMARO IROC-Z 1990CHEVROLET CAMARO RS 1992-1993CHEVROLET CAMARO Z28 1991-1997CHEVROLET CAVALIER 1983-1997CHEVROLET CAVALIER (CAN) 1984CHEVROLET CITATION 1982-1983CHEVROLET CITATION II 1984-1985CHEVROLET CORSICA 1987-1996CHEVROLET CORVETTE 1982-1992CHEVROLET CORVETTE LT1 1993-1996CHEVROLET CORVETTE LT4 1996CHEVROLET CORVETTE ZR1 1990-1995CHEVROLET EL