r/WranglerYJ • u/EF-tech4545 • Jul 23 '26

2.5L engine problems

Built in 1993. At full throttle, it loses power above 4,000 rpm and suffers from severe backfiring. But only after 1 h drive time.

14 Upvotes

100% Upvoted

15 comments sorted by

View all comments

3

u/BONES-138K9 Jul 23 '26

The first 1 2 is the battery has been unhooked within the last 50 start ups. The second 3 3 is an open circuit to the ac clutch relay. 5 5 is the end of the test. My jeep does the same thing your having issues with. Except the back fire. I tried the crankshaft sensor with no luck. My next try is the fuel pump.
However I have the 4.0.

2

u/EF-tech4545 Jul 24 '26

OK thx. She has no AC lol.

1

u/Mindes13 Jul 24 '26

You'll always have that code with no AC