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1991 Chevrolet S10 Blazer Tahoe 4.3L Poor Idle Quality, Hesitation, Stall, MIL Lamp on
Posted to GM Driveability on 2/13/2002 15 Replies

Good Afternoon

We have a Chevy Blazer with a customer complaint of low and erratic idle with a sometimes stall on cold starts. The Blazer will not stall when warm at idle but will idle as low as 450 RPM.

It had a code 33 when we got it but it has not reset. ...

15 Replies Received (View Replies)

  Related Documents & Media  1991 Chevrolet S10 Blazer Tahoe

 
Message Closed w/FIX

car Vehicle Data

1991 Chevrolet S10 Blazer Tahoe

VIN 1GNDT13Z7M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsCA
SymptomsPoor Idle Quality, Hesitation, Stall, MIL Lamp On
OccursCold, Hot, Idle
Misc.Tbi

Trouble Codes

33map sensor voltage high
Message Closed w/FIX

car Vehicle Data

1991 Chevrolet S10 Blazer Tahoe

VIN 1GNDT13Z7M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
EmissionsCA
SymptomsPoor Idle Quality, Hesitation, Stall, MIL Lamp On
OccursCold, Hot, Idle
Misc.Tbi

Trouble Codes

33map sensor voltage high