INCREASED IDLE RPM AFTER START UP

Model and Year: 1988 CAVALIER W/2.8L MPFI ENGINE

Some customers driving 1988 Cavaliers with a 2.8L MPFI engine (VIN Code W) may comment regarding a higher than normal engine idle speed condition after engine start.

If customer comments are received concerning the higher engine idle speed, a new service PROM should be installed in the electronic control module. The new PROM may be obtained from GMSPO by ordering the appropriate part number (reference the chart below):

EMISSION OLD SERV TRANSAXLE NEW SERV SYSTEM PROM P/N TRANS RATIO MODEL PROM P/N -------- -------- ---- --------- ----- --------- CALIF. 16082348 3-SPD AUTO 3.18 1JF37/67 16128933

CALIF. 16080200 3-SPD AUTO 2.84 1JC35 16128933

FEDERAL 16082357 5-SPD MAN 3.61 1JA(ALL) 16128934

FEDERAL 16082362 3-SPD AUTO 3.18 1JF37/67 16128936

FEDERAL 16075560 3-SPD AUTO 2.84 1JC35 16128936

CALIF. 16082366 5-SPD MAN 3.61 1JA(ALL) 16128937

Use applicable Labor Time and Operation Code.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.