engine noise
my 00 4.7 grand cherokee laredo had a slight knock at acceleration and once again when I let off the gas, yesterday I passed someone and something went wrong, and now there is an eratic knocking or pinging noise. I took apart the top of the engine and took off the drivers side valve cover where the noise sounded like it was coming from, and I cant see anything out of place. The engine is DOHC