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1991 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Dies at idle
Posted to GM Driveability on 1/19/2006 15 Replies

Vehicle came in with erratic idle & dies at idle. Found system running lean. block learn 138 , integrator 128 - o2 tests ok . Tps reading was 11% . All-Data said tps reading at idle should be zero.I replaced TPS for this & new one reads 12% so I am assuming th...

15 Replies Received (View Replies)

  Related Documents & Media  1991 Chevrolet Astro

 
Message Closed w/Summary

car Vehicle Data

1991 Chevrolet Astro

VIN 1GBDM19Z1M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
SymptomsPoor Idle Quality, Hesitation, Dies at Idle
OccursCold, During Warm Up

Trouble Codes

33map sensor history code
Message Closed w/Summary

car Vehicle Data

1991 Chevrolet Astro

VIN 1GBDM19Z1M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI / TBI
SymptomsPoor Idle Quality, Hesitation, Dies at Idle
OccursCold, During Warm Up

Trouble Codes

33map sensor history code