COLD DRIVEABILITY HES/SAG INSTALL AIR/FUEL MIXTURE

COLD DRIVEABILITY - HESITATION/SAG

VEHICLES AFFECTED: 1987 "J" CAR WITH 2.0L L-4 ------------------ (VIN CODE K) ENGINE

Some 1987 "J" cars with the 2.0L OHC engine and either automatic or manual transaxle may exhibit a cold hesitation or sag below approximately 0 degrees C (32 degrees F).

If other system problems, i.e., ignition or fuel feed, are not causing the cold drive problem, then an Air Fuel (A/F) mixture drop tube kit should be installed. The inlet-manifold mixture tube improves cold fuel (liquid) distribution to the inlet runners, thus improving cold-to-warm driveability.

The accompanying drawing shows the installation of the mixture drop tube kit, P/N 10106050, includes two gaskets and metal drop-tube.

Automatic Transaxle Only:

Further cold-to-warm driveability (above approximately 0 degrees C (32 degrees F) improvements are attainable through a PROM change. Refer to the following bulletin: GM of Canada - #87-620-105

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.