i have an 89 jeep cherokee xj with the 4.0 in it. it has a borla header and cat back exhaust a custom made k&n air tube. i took it threw a little water/ mud hole yesterday. it didnt get any water in the motor i dont think at least. it ran ok for about 2 miles then it let out a huge back fire and it wont start now. any ideas on want happened, clues on where to start looking for the problem?? any help will be greatly appreiated..:evil: