Quote:
Originally Posted by TJ's GMC
I'll be darned if I put the old plugs back in and it runs fine! Guess that'll mean another run back to Napa for Autolight plugs if that's the case.
|
Well you fooled me with that one, thought you were done. I guess my next guess is to guess..............................Rod Knock. There is an easy test for that. You may want to take off one plug boot at a time while motor running to see if it quits. That may not be possible if it's not knocking all the time. Anyway the test for rod knock is on YouTube. I think valve train noise is a little more "ticky tacky" than your noise. Yours is a hard knock. But it is hard to tell from my house.