Power loss in reverse! - JeepForum.com

 
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post #1 of 9 Old 07-04-2011, 10:06 AM Thread Starter
zte87
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Power loss in reverse!

So when on flat ground my jeep drives in reverse just fine but when backing up a hill my jeep just chokes up and want to die! I don't know if it is related at all but my cel is on with a code 24/25 and I have the new iac and tps ordered! Any ideas on what could cause this?


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post #2 of 9 Old 07-04-2011, 05:08 PM
bharris68
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Search for those codes here on J/F and you should get your culprit. One of those two I think is A/C (Which I don't think many of us have), and the other may be your suspect.
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post #3 of 9 Old 07-04-2011, 05:13 PM Thread Starter
zte87
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the codes are for the iac and tps sensors this is driveing me nuts!

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post #4 of 9 Old 07-04-2011, 05:57 PM
Noltz
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well a TPS not functioning right will certainly cause a sputter or low power.

Does it work fine forward up a hill? I'm thinking perhaps the engine torquing is causing something to short out. Had a Toyota that the Crank Sensor wire was shorting against the power steering line, but only in reverse when you backed up fast (or up a hill). It would stall, but immediately restart.

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post #5 of 9 Old 07-04-2011, 06:56 PM Thread Starter
zte87
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Yeah it drive up hill forward just fine! I did order new iac and tps sensor's and should have it this week!

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post #6 of 9 Old 07-04-2011, 07:48 PM
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Quote:
Originally Posted by zte87 View Post
So when on flat ground my jeep drives in reverse just fine but when backing up a hill my jeep just chokes up and want to die! I don't know if it is related at all but my cel is on with a code 24/25 and I have the new iac and tps ordered! Any ideas on what could cause this?
I don't think either sensor is bad. The odds of bith of them being NG is too remote. Code 25 does mention a vacuum leak as a possible cause. I would check for a vacuum leak especially at the MAP sensor. That sensor sends a message back to the brain which uses that signal to regulate fuel flow.

Or, you got a wire rubbing up against sumtn!

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post #7 of 9 Old 07-04-2011, 08:41 PM Thread Starter
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it could be a vacuum leak being that I have a nasty exhaust leak somewhere on the manifold! I figured at least one of the sensor is bad tow because when I first start the jeep after its been sitting awhile I have to stay on the gas until its warmed up a little or it will die! I am going to be replacing the manifold (I think it is cracked) with more than likely a cheap pacesetter when I do this I will try and make sure I don't have vacuum leak at that time!

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post #8 of 9 Old 07-04-2011, 08:53 PM
dodger889
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exhuast leaks only mess up the O2 sensor not the others. I would check over the vacuum lines make sure none of them are getting bad.

A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
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post #9 of 9 Old 04-17-2013, 08:25 AM
mauricioarce
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Did you get a solution

Hello there

Did you get a solution for this issue

I have the exact same problem my Jeep is a 199 TJ with 2.5 engine

Please let me know
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