Engine - No Start, Runs Rough, or Misfires
86chevy10Number: 86-94
Section: 6D
Date: JUNE, 1986
Subject: INTERMITTENT ROUGH RUNNING OR MISFIRE ON 1985-86 5.0L MPFI V-8 (VIN CODE F) ENGINES
Model and Year: 1985-86 VAN NUYS BUILT CAMARO MODELS ONLY
TO: ALL CHEVROLET DEALERS
CONDITION
Engine may not start, may run rough, or may misfire intermittently, on 5.0L MPFI V-8 engines built at the Van Nuys plant (VIN Code F) only.
CAUSE
The electronic spark timing lines to the distributor may be making hard 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 have the insulation rubbed through due to a hard contact with the engine lift hook.
CORRECTION
1. Disconnect negative battery cable.
2. Locate and repair any wires with insulation rubbed through.
3. Add conduit 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.