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Old 02-10-2012, 07:04 PM   #1
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4 Banger Problems

Hello All. I finally bought a jeep wrangler and I couldn't be more happier about it..Big difference from going from a cherokee into A wrangler. Anways the jeep I bought was totally different from what I wanted from the get go but my buddy gave me A deal that was just to sweet to pass up. Its A 97 tj 2.5 auto with 148xxx miles. The jeep isn't perfect and had its fair share of problems "needed brakes, new top blah blah blah. But heres my problem..I understand the 2.5 isnt gonna be no v8 as far as power but somethings keeping it from its full potenital. Sometimes it runs great and other times it seems like somethings holding it back and the gas mileage is horrible. I've changed all the plugs, wires, cap and button, cleaned the throttle body, and changed the oil "which the oil wasn't milky so doubt its head gaskets". The fuel pump is pumping the correct ammount of psi. The only other ideas is maybe a bad cat or some sorta sensor? Any input into my problem would be greatly appricated! Thanks!

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Old 02-10-2012, 07:19 PM   #2
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The only situations that I can think of that you haven't covered yet are plugged fuel filter and plugged are filter. Does this drop in power happen at certain speeds or Rpms? Is your jeep stock, because if not gearing could have a huge effect on your performance as well.

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Old 02-10-2012, 07:26 PM   #3
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Other than the small lift thats on the jeep yes its stock. Where is the fuel filter on a wrangler? Are they hard to change?
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Old 02-10-2012, 07:40 PM   #4
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Originally Posted by screwystewy View Post
Other than the small lift thats on the jeep yes its stock. Where is the fuel filter on a wrangler? Are they hard to change?
Assuming your 2.5 is similar to my 4 liter, the fuel filter should be located in the fuel pump assembly on top of the tank. You will have to drop the tank to access the filter. I would strongly suggest that you drop the tank with no more than a quarter tank, otherwise it will weigh a ton and be impossible to work with.
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Old 02-11-2012, 02:25 AM   #5
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Lando is correct, 2.5's also have the filter in the tank. It's part of the fuel pump assembly.
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Old 03-19-2012, 03:41 AM   #6
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Did you figure out what the problem was. I just picked up a 97 4 cyl and i am getting 8-10 MPG's. I replaced all the plugs,wires, distributer and put injector cleaner in. I am interested to see what you might have done to fix yours.
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Old 03-19-2012, 03:51 AM   #7
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Other than the small lift thats on the jeep yes its stock.

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