Not sure what flow chart you're referring to. I believe that it is coming from the engine, not the cat. Engine oil level is in the operating range.
I'll take it in this week.
Hey fellas.
My damn car is acting up. When I crank it in the morning it cranks fine, when I pull out of the driveway before it warms up and go up to at least 2000 rpm to get it on the road...it has this knocking sound coming from the engine. The sound goes away when it has warmed up, and the...