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Old 04-05-2013, 08:50 PM
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2.5 missing under a load.

I have a 95 YJ. I am new in the jeep business however still he weekend mechanic at times. I have a miss when the jeep is under a load.

I have replaced the plugs wires, cap and rotor thinking it was a wire problem still have the miss. This YJ has the 2.5 with a 5 speed. I just bought this rascal with 112k on the odometer any suggestions.
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Old 04-07-2013, 09:17 AM   #2
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Sounds like spark is taken care of... What about fuel issues? Clogged injectors, low fuel pressure, etc.

Also, check all of your electrical grounds and make sure they are tight and making good contact.

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Old 04-07-2013, 09:39 AM   #3
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My 94 acted like that at cold temperatures (below freezing) and it ended up being the ecu had moisture in it. try a hair dryer on the ECU for 30 mins then take it for a ride and if it runs better it might be your problem. I purchased a napa reman 3 years ago for around 380$ but it looks like all they did was replace the capacitors because there is gobs of white silicone where the capacitors are located. I have read a few posts of people replacing these themselves but I am not that good at electrical soldering so I chose the expensive route. I ruled out fuel issues and a bad coil before by simply throwing $ at it. But a spare coil is handy out in the boonies anyway.
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Old 04-07-2013, 11:06 AM   #4
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Coil? Have you replace the fuel filter and fuel strainer in the tank?
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Old 04-07-2013, 12:02 PM   #5
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Quote:
Originally Posted by 94Wrangler4.0 View Post
Coil? Have you replace the fuel filter and fuel strainer in the tank?
Agree, sometimes a weak coil will cause a miss under load and so will a dirty fuel filter....
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Old 04-07-2013, 07:54 PM
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Thanks folks. I have not replaced the coil. I have not replaced the fuel filter however the guy that had it before me replaced the in line filter but never said anything about the fuel tank. I just hate to keep chasing this down spending money on issues that may not be the problem. I am suspicious of the injectors.
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Old 04-07-2013, 09:19 PM   #7
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My bet is you are hitting the rev limiter!
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Old 04-08-2013, 02:39 PM   #8
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Fuel filters are cheap and only take a few minutes to install. Its over the driver's side rear axle.....there is no filter per se in the tank but there is a sock type screen that has been known to plug up...
a weak spark will cause a miss under load too
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Old 04-24-2013, 07:02 PM
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Well folks I found out what the problem was I have a bad motor. The number 2 cylinder has no compression and 1,3 are at 80 so I am in the need of a good rebuild or new engine.
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Old 04-24-2013, 08:16 PM   #10
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Quote:
Originally Posted by Bmagaha88 View Post
Well folks I found out what the problem was I have a bad motor. The number 2 cylinder has no compression and 1,3 are at 80 so I am in the need of a good rebuild or new engine.
Rebuild it yourself.
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Old 04-25-2013, 08:39 PM
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Dose anyone know of any good sites that have rebuild kits? And if anyone has done this before any advice would help! I'm gonna rebuild her!

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