PROM - Rough Idle or Seat Shake

9232chevy02

Number: 92-148-6E

Section: 6E

Date: APRIL 1992

Corporate Bulletin No.: 236506

ASE No.: A1, A8


Subject:
ROUGH IDLE OR SEAT SHAKE


Model and Year:
1992 CORSICA AND BERETTA WITH
2.2L ENGINE AND AUTOMATIC TRANSMISSION


Condition:
Some owners of 1992 "L" cars may comment of a rough idle or seat shake inside the car at idle.

Cause:
Engine idle speed causing a harmonic resonance in the vehicle.

Correction:
A revised calibration has been released to raise the engine idle speed in automatic transmission "L" cars from 600 to 800 rpm.

Install the appropriate calibration from the following chart with a T-100 (GM-CAMS) or a Tech 1 according to the User's Manual instructions provided with the cartridge.

The Tech 1 cartridge part number is TK06032A and should should have been sent to dealers on February 28, 1992. The calibrations will also be included in the January 1992 Software Update for the T-100.

Car Trans Emission Part Broadcast Scanner
Body Type Type Number Code I.D.

L Auto Federal 16176091 BATU 6091
L Auto Calif. 16176101 BATW 6101

Labor Operation Number: T0500

Labor Time: 3 Hours