Help! We purchase a 2000 Trooper noticed a slight ping/knocking noise in
the first month. Several months later noise is more often and now we are
having trouble starting. You start it, it dies, about 2 to 3 times. I read
the article on the pinging noise took off and cleaned the EGR but not sure
I torn it down far enough. We have changed inline gas filter, air filter,
and cleaned EGR any other ideas?