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
darsben wrote:
Rereading I wonder could the vacuum advance be screwing up as in the vacuum line be collapsing
No vacuum... no advance. I agree with trying a tank of preium gas or several cans of octane booster if tank is full. If this stops it then you know you have a timing problem... to advanced. Get the timing fixed and go back to regular gas.
Decades ago I used to time my engines by advancing the timing until the engine knocked on hard acceleration and then back it off a little. Does a 03 8.1 have a knock sensor?
