Engine knocking
Our RV makes a loud knocking when all 3 of the following occur simultaneously, overdrive kicks in, engine fan system turns on and accelerator is pushed. Does anyone have an idea of what could be caus...
Forum Discussion
I agree with a post above, to start try a full tank of premium fuel. See if that changes anything. If so it is spark knock (preignition, engine ping). Then post back and we can go from there.
