Engine - Low Speed Chuggle/Inaccurate Fuel Economy

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NUMBER: 90-T-194

CORP.REF.NO: 076503

DATE: January 1991

SECTION: 6E3


SUBJECT:
CHUGGLE AT LOW SPEED (28-37 MPH)/
INACCURATE DRIVER INFO SYSTEM MILEAGE - NEW MEM-CAL

MODELS/YEARS:
89-90 CUTLASS CALAIS W/2.3L (VIN N) ENGINE AND 3T40 TRANSAXLE


If concerns about chuggle between speeds of 28 - 37 mph are received and thorough diagnosis of the engine control system does not resolve the concern, you may need to install a revised Mem-Cal.

A condition of inaccurate fuel economy, on vehicles equipped with the Driver Information System (DIS) option may also be corrected by the installation of one of these Mem-Cals.





PARTS INFORMATION:


These Mem-Cals raise the TCC engagement speed to 37 mph and reduce the throttle position, crowd release of TCC. However, vehicle fuel economy may be affected. Be sure to advise the owner of this.

NOTICE:
This Mem-Cal is intended to be used on a as needed basis. The part number will be in GMSPO but as a field fix only. This will not be published in the GMSPO catalog.

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation Number:
T0500
Labor Time:
0.4 hour
Trouble Code:
92