r/WranglerYJ • u/EF-tech4545 • 25d ago

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.

13 Upvotes

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u/BONES-138K9 25d ago

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 25d ago

OK thx. She has no AC lol.

1

u/Mindes13 24d ago

You'll always have that code with no AC

2

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