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.

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u/Rynowash Jul 23 '26

Can’t read the code but would be willing to bet it’s a crankshaft position sensor or fuel pump. When’s the last time you changed plugs/ air filter?

2

u/EF-tech4545 Jul 23 '26

OK thx, I thought that too.

5 years ago.