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1989 Chevrolet S10 Blazer 4.3L Poor Idle Quality, Intermittent MIL
Posted to GM Driveability on 5/17/2004 6 Replies

This blazer has an intermittent rough idle when started cold and sets a code 33 (Map sensor). When warm runs great all powers and grounds check out ok. Coolant sensor and EGR function normaly. Is it possible that the injector could have a small enough leak to ...

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Message Closed w/Summary

car Vehicle Data

1989 Chevrolet S10 Blazer

VIN 1GKDT13269
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsOBD1
SymptomsPoor Idle Quality, Intermittent MIL
OccursCold, Intermittently

Trouble Codes

33Map sensor
Message Closed w/Summary

car Vehicle Data

1989 Chevrolet S10 Blazer

VIN 1GKDT13269
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsOBD1
SymptomsPoor Idle Quality, Intermittent MIL
OccursCold, Intermittently

Trouble Codes

33Map sensor