NO START,ROUGH RUN,MISFIRE EST HARNESS RUBBED THRU

1985-86 FIREBIRD MODELS WITH 5.OL MPFI V-8 ENGINE (ENGINE CODE F) BUILT AT VAN NUYS (VIN CODE L) ONLY

CONDITION:

ENGINE MAY NOT START, MAY RUN ROUGH OR MAY MISFIRE INTERMITTENTLY.

CAUSE:

THE ELECTRONIC SPARK TIMING (EST) WIRING TO THE DISTRIBUTOR MAY BE MAKING CONTACT WITH THE ENGINE LIFT HOOK AT THE REAR OF THE RIGHT HAND CYLINDER HEAD (NEAR THE DISTRIBUTOR). EITHER THE ENGINE HARNESS OR THE EST HARNESS ON THE DISTRIBUTOR MAY BE AFFECTED.

CORRECTION:

1. DISCONNECT NEGATIVE BATTERY CABLE.

2. LOCATE AND REPAIR ANY WIRES WITH INSULATION RUBBED THROUGH.

3. ADD CONDUIT COVER TO WIRE HARNESSES AS NECESSARY TO PROTECT WIRES. IN SOME CASES, IT MAY BE NECESSARY TO SECURE HARNESS WITH TIE STRAPS TO AVOID CONTACT WITH THE ENGINE LIFT HOOK.

4. RECONNECT NEGATIVE BATTERY CABLE.

WARRANTY INFORMATION:

USE EXISTING LABOR OPERATIONS FOR WIRE HARNESS REPAIR.

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.