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1990 Chevrolet Cavalier 2.2L Poor Idle Quality, Stall
Posted to GM Driveability on 7/21/1998

Textbook MAP measured at ecm using DVOM koeo=5V koer=1.5V Using 3 different scanners(all otc 4000)with several different cartridges there is weird MAP voltage(all other serial data is textbook) koeo=1V koer=5V (scanner map data is opposite of DVOM data!!!!)

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car Vehicle Data

1990 Chevrolet Cavalier

VIN [No VIN Available]
Engine2.2 L / 4 cyl
Emissionsp4 us,federal
SymptomsPoor Idle Quality, Stall
OccursIdle, Intermittently

Trouble Codes

33High MAP voltage/low Vacuum
Message Closed

car Vehicle Data

1990 Chevrolet Cavalier

VIN [No VIN Available]
Engine2.2 L / 4 cyl
Emissionsp4 us,federal
SymptomsPoor Idle Quality, Stall
OccursIdle, Intermittently

Trouble Codes

33High MAP voltage/low Vacuum