After my car warms up, I hear a loud knocking. I did a tune up on it... plugs, plug wires, oil & filter, (didn't change the cap) & it still knocks. Could it be the wrong plugs that were installed? Could it be timing?
It runs good & never backfires or stalls! It never knocks when I first start it... only after it's warm! Please Help!
Thank You
Tags: 1978, 350, chevy, Engine, knocks, warm