Hello...My 1999 WJ 4.0 l6 can't start. It backfires through the throttle body when turning the engine over. Initially it showed these fault codes: P0340, P1765, P1391, P0531, P0761 and C214C, some codes disappeared except for P1391 and later P0301.
The day it died, I filled the Grand Cherokee with gas to the brim, as I was making a long trip. That's when all hell broke lose. The engine had no power and was running as if it was cutting off fuel (pulsating), and it also increased fuel consumption significantly. By sheer luck i arrived at my destination.
I also recall that the MIL light f