Throttle Issue - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 7 Old 09-03-2017, 08:44 AM Thread Starter
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Throttle Issue

I am new here and have searched all over trying to find a article that matches my issue but been unable to.

I have a 08 JKU X. The issue is intermittent and I get no engine codes. I will start off and everything will seem fine. Then I will lose power. I have noticed that if I back off the throttle and just use a little bit i can keep her going. If I try to press any harder (further) it will just lose all power as if going back to idle. Some times if I stay in it it will come out of it and I can use the full throttle range other times I will have to pull over and shut it down for a little while. Now I will say it also seems to become a bigger issue the more I drive it. I can normally make my trip to work first thing in the morning with out an issue.

I am more of a fix it myself person but these newer cars are making it hard to do. Thanks for any help
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post #2 of 7 Old 09-03-2017, 08:58 AM
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Try checking the gas pedal harness and the throttle body harness connections for corrosion. It doesn't take much, believe me. I missed it on my first look when I had similar experiences.
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post #3 of 7 Old 09-03-2017, 03:53 PM
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Get a fuel pressure gauge on it. So many people overlook the obvious. A fuel pump can act up more when it heats up. I think your 3.8 should have a valve on the fuel rail, If not you will have to "T" into it. Make sure it doesn't leak and run the gauge through the hood seal at the cowl. That way you can see if supply is good when it acts up.
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post #4 of 7 Old 09-04-2017, 06:01 AM
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coil and rlee bring viable sggts to the thread. If it's an 08 & you're not the original owner + haven't done this already , , I would not hesitate to do as advised and in the spirit of keeping things simple to eliminate those first, clean the throttle body and butterfly valve thoroughly as I've seen the buildup on the backside of a 3.8l throttle valve be dirty enough to cause massive stumbling but , granted, yours seems exacerbated by heat from operations ...still, a good thing to do anyway....


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post #5 of 7 Old 09-06-2017, 01:50 PM Thread Starter
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Just a little follow up. Throttle Body is clean. Connections all look good along with cleaning TIPM and PCM Ground wires (they looked good but what the hell). Now I will also say I do get the xmas dash lights, wipers going, headlights flash, radio goes off and Gauges drop to zero then come back up. They dont seem to happen at the same time as I will get one or the other (sluggish or bells and whistles) but i do seem to get all the bells & whistles more often when it starts being sluggish. It seems to keep leaning towards a TIPM issue. Now with that I had replaced it but it was with a re-man. That might of been where I went wrong (trying to save money). The more I read about the recall of the 07's I am thinking of taking it in and seeing about having the system flashed just to make sure there is no issue there. I am also working on trying to get another TIPM under the warranty to see if maybe I just got another problem child.

Thanks again everyone.
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post #6 of 7 Old 11-14-2017, 03:39 PM Thread Starter
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Sry took so long to get back but got it figured out. Electrical issue. Aftermarket radio connection. Power loss - New PCM. Everything seems fine now..
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post #7 of 7 Old 11-27-2017, 05:41 PM
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Quote:
Originally Posted by Victor Baver View Post
Sry took so long to get back but got it figured out. Electrical issue. Aftermarket radio connection. Power loss - New PCM. Everything seems fine now..
I'm curious... what happened exactly? Thank you!

'13 10A JKU
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