1998 Tahoe with 5.7 Spark knocking problem
beanlep
03-29-2010, 01:24 PM
I have a 1998 Tahoe with 5.7 350 4x4 with about 150,000 miles and I am having a problem with spark knocking when accelrating. What could be the cause of this. It has new plugs, wires, cap.
777stickman
03-29-2010, 06:33 PM
Welcome to AF: Lots of causes for this and I will list some for you.
1. Inop Knock Sensor.
2. Carbon build-up in the combustion chamber and on the top of the pistons.
3. Vacuum leaks.
4. Wrong heat range spark plugs installed.
5. Poor fuel quality.
1. Inop Knock Sensor.
2. Carbon build-up in the combustion chamber and on the top of the pistons.
3. Vacuum leaks.
4. Wrong heat range spark plugs installed.
5. Poor fuel quality.
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