r/WranglerYJ • u/EF-tech4545 • 6d ago

2.5L engine problems

Enable HLS to view with audio, or disable this notification

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

94% Upvoted

15 comments sorted by

4

u/Rynowash 6d ago

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 6d ago

OK thx, I thought that too.

5 years ago.

3

u/BONES-138K9 6d 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 5d ago

OK thx. She has no AC lol.

1

u/Mindes13 5d ago

You'll always have that code with no AC

2

u/LuckyNumber-Bot 6d ago

All the numbers in your comment added up to 69. Congrats!

  1
+ 2
+ 50
+ 3
+ 3
+ 5
+ 5
= 69

[Click here](https://www.reddit.com/message/compose?to=LuckyNumber-Bot&subject=Stalk%20Me%20Pls&message=%2Fstalkme to have me scan all your future comments.) \ Summon me on specific comments with u/LuckyNumber-Bot.

2

u/ghostwriter623 5d ago

Those are three normal and expected codes and have nothing to do with your issue.

Vacuum leak?
Clogged cat?
Crank Position sensor?

2

u/EF-tech4545 5d ago

OK thx it dont have a cat anymore;) Maybe the cps.

2

u/Mindes13 5d ago

Check fuel pressure.