Highway Chuggle and Spark Knock Concerns

88oldsmobile22

SUBJECT: HIGHWAY CHUGGLE AND SPARK KNOCK CONCERNS


1987 FIRENZA WITH 2.0L OHC L4 ENGINE
MODELS/YEARS: IN ALL TRANSAXLE APPLICATIONS
(INSTALLATION OF NEW PARTS)

NUMBER: 87-T-75

CORP. REF. NO.: 836538

DATE: December 1988

SECTION: 6E

Customers comments that identify a highway low-speed chuggle or spark knock concern may be repaired with the following changes.

- Intake Manifold Drop-Tube Kit Part Number 10106050

- EGR Valve:

Automatic Transaxle Part Number 17112004
Manual Transaxle Part Number 17112005

- PROM Package:

New PROM I.D. New
Transaxle Part Number (Scan Tool) Broadcast Code

Automatic 16129056 9092 ANXH
Manual 16129057 9072 ANXD

Parts are currently available through GMSPO.

If driveability conditions still continue after the above changes, refer to service manual section 6E2-B for further directions.

WARRANTY INFORMATION

Labor Operation Number: T1384
Labor Time: .9 hrs.
Trouble Code: 92