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Old 03-28-2013, 12:30 PM   #1
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Throttle hesitation

Is anyone experiencing foot throttle hesitation on there 6 speed manual? Is it a sensor problem? I have a 2012 sport w/4:56 G-2 gears. Seams to have no low end torque on take off at times I kill it. I've been driving manual shift rigs for 35yrs. Thanks for any help

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Old 03-28-2013, 12:39 PM   #2
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Are you sure it's not hill start assist kicking in?

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Old 03-28-2013, 12:47 PM   #3
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Quote:
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Are you sure it's not hill start assist kicking in?
Yeah it does it on the flat also with no hill start engaged. I'm thinking about having the ecm checked for codes or maybe the fuel sensor checked
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Old 03-28-2013, 12:54 PM   #4
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I'm also running 35"x 10.5 tires. I wouldn't think that would drag down the motor w/4:56 gears
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Old 03-28-2013, 12:54 PM   #5
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I have a hesitation on my 2013 JKUR 6 speed but only for like the first 3-5 mins when cold. I have the HSA turned off via the EVIC...
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Old 03-28-2013, 01:06 PM   #6
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I have a hesitation on my 2013 JKUR 6 speed but only for like the first 3-5 mins when cold. I have the HSA turned off via the EVIC...
Sounds like a good idea, I will do the same. I'm also gonna turn off the traction control shut off.
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Old 03-28-2013, 01:09 PM   #7
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Originally Posted by bmidd31 View Post
I have a hesitation on my 2013 JKUR 6 speed but only for like the first 3-5 mins when cold. I have the HSA turned off via the EVIC...
Mine does it after warm up after automatic choke is off
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Old 03-28-2013, 03:29 PM   #8
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The 2012 has a throttle by wire. Switching between my JK and a car with a good old fashioned throttle cable I do notice that there is a half second hesitation when I push on the throttle in the JK. But I notice that on every car with a throttle by wire setup.
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Old 03-28-2013, 04:48 PM   #9
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One day I noticed serious lag on my 6 speed. To the point I was like what the hell is going on here. On that day I could floor it and was acting like I was pushing the gas maybe 1/4-1/2 way. It was under 5000miles and I had been doing a lot (too much in retrospect) short shifting trying to see what the best mpg could be. I figured the computer had started learning I liked to keep it in low RPMs. It's been awhile but it seems like the next day it was back to normal.
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Old 03-28-2013, 07:18 PM   #10
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Mine also. It's a combination of a way-stiff throttle pedal (which I get, you don't want to fall off a rock and floor the thing by accident) and the butterfly position v/ pedal position. On these electric throttles, the % the butterfly opens is mapped to the pedal position, vehicle speed, rpm, wheel speed etc. It's not linear.
On my previous '10 Mustang off-idle the butterfly was factory set to only open 55% even if floored... until the rpm and wheel speed (front wheel) agreed with the map setting. I had a custom tune fix that.

I thought I saw another thread on here discussing changing the spring or potentiometer or something similar on the pedal to try and fix the "lag". (without getting into the computer mapping). I am going to look at the pedal this weekend. If I come up with anything practical, I'll post it.

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