Spark Plug - Fouling

NO.: TSB-95-16-003

DATE: November, 1995

MODEL: All Models

SUBJECT:
SPARK PLUG FOULING

BACKGROUND INFORMATION

Short, frequent engine starts during transportation of new vehicles for delivery to dealers can cause spark plug fouling. Customers who drive short distances in cold weather may also experience spark plug fouling. If a vehicle is hard to start or experiences rough idle or misfire, the spark plugs may be wet or have some accumulated carbon deposits.

Cleaning the plugs should correct the problem. Spark plug replacement should not be necessary.

VEHICLES AFFECTED

All models

PROCEDURE

1. Start the engine and warm to normal operating temperature.

2. Clean the spark plugs as follows:

CAUTION:
Do not exceed the driving or engine rpm speeds listed below.

a. Drive the vehicle at 25-40 mph at 4,000 to 4,500 rpm for five minutes. This will bring the spark plug temperature up to a point that will burn off the carbon deposits.

b. If the above driving method does not correct the problem, remove the spark plugs and use an appropriate spark plug cleaner to remove carbon deposits.

WARRANTY INFORMATION

Use standard warranty procedures.