INOPERATIVE TPS INSTALL HEAT SHIELD

Model and Year: 1982-1986 CELEBRITY WITH 2.5L (VIN CODE R) ENGINE 1982-1986 CAMARO WITH 2.5L (VIN CODE 2) ENGINE 1985-1986 M VAN WITH 2.5L (VIN CODE E) ENGINE 1985-1986 S/T TRUCK WITH 2.5L (VIN CODE E) ENGINE

TO: ALL CHEVROLET DEALERS

Customer comments of reduced engine performance, poor idle, and engine surge, may be received on the above listed vehicles equipped with 2.5L L4 engines.

After a vehicle has been accurately diagnosed as having an intermittent electrical signal from the throttle position sensor, replace the sensor with AC TPS Service Kit, P/N 17078274. At the same time, remove the factory installed TPS heat shield attached by the EGR bolt and replace it with a new heat shield service kit, P/N 17111750 (Figure 1). The contents of the service kit are:

DESCRIPTION

Screw assemblies - 2 each (hex head) Heat Shield - Stainless steel Graphics - Instruction sheet

Whenever a new 300 Series TBI is purchased from WDDGM and it is not complete with the AC TPS and the stainless steel heat shield it must be retro-fitted to include the new service parts.

Use applicable labor time and labor operation numbers.

RECOMMENOED PROCEDURE:

1. REMOVE AIR CLEANER ASSEMBLY.

2. REMOVE AND DISCARD OLD HEAT SHIELD ATTACHED TO EGR MOUNTING BOLTS, BY REMOVING ONE SOLT ONLY.

3. REMOVE AND DISCARD OLD TPS ATTACHING SCREWS.

4. INSTALL NEW TPS (1) AND HEAT SHIELD (3) USING NEW ATTACHING SCREWS (2) PROVIDED WITH TPS HEAT SHIELD SERVICE KIT.

o TIGHTEN ATTACHING SCREWS TO 18 IN. LBS. (2.0 Nm).

5. INSPECT TPS CONNECTOR LEAD PER BULLETIN 86-8-10.

6. INSTALL AIR CLEANER ASSEMBLY.

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.