SPARK PLUG FOULING CORRECTION REPLACE PLUGS AND VACUUM BRAKE. Pontiac 6000 1982

For 1990-2009 cars

# SPARK PLUG FOULING CORRECTION REPLACE PLUGS AND VACUUM BRAKE

#### Subject: SPARK PLUG FOULING - 1982 "A" AND "X" CARS WITH 2.8L V-6 ENGINE

Spark plug fouling can occur on early production vehicles subjected to repeated short trips. This could then result in a possible no start, rough idle or poor performance condition.

The following actions will reduce the possibility of spark plug fouling and are recommended for vehicles that exhibit this condition.

1. Replace carbon fouled spark plugs with the following:

VEHICLE ENGINE RPO SPARK PLUGS ----------- ---------- ------------ "A" & "X" LE2 R43CTS R42CTS "X" - Hi Output LH7

2. Reset primary vacuum break to revised settings listed below by turning adjusting screw counter-clockwise.

When making primary vacuum break adjustment, it may become necessary to adjust (lengthen) the air valve rod to obtain revised setting. See Service Manual for instructions.

VACUUM BREAK SPECIFICATION

REVISED ENGINE TRANSMISSION SETTING ------ ------------- ------- LE2 Automatic 30deg LE2 Manual 32deg

LH7 Automatic 32deg LH7 Manual 32deg

After making these adjustments, the vacuum can should be painted with a black stripe.

Adjust the air valve rod as shown in the Service Manual and set to specification (1 deg).

4. Adjust choke unloader to 45 on all engines.

In addition to following the procedures outlined above, assure that the engine timing and fast idle adjustments are per vehicle emission label specifications and that engine oil is not fuel contaminated.

#### WARRANTY INFORMATION

Labor Operation T0065 Time Allowance .9 Hours

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.