Stalls when warmed up.....

501 · **Posted:** Sun Jan 10, 2010 1:36 am

My jeep started acting strange yesterday. It would run great cold, but when it gets warmed up it stalls. Got in it today and it does the same thing. I can start it up and it will idle while I clean it off, I take off and drive like 2-3 miles then it will die at stop signs/lights. It doesn't seem to idle after it warms up.

My battery is brand new (3 months old)

Any ideas?

JeepinJarhead03 · **Posted:** Sun Jan 10, 2010 1:47 am

TPS sensor possibly

could still be the battery though, but usually if it's the batt it simply won't idle, warmed or cold

when it dies at stop signs does it jerk?? if so could very well be the torque converter

501 · **Posted:** Sun Jan 10, 2010 1:49 am

JeepinJarhead03 wrote:

TPS sensor possibly

could still be the battery though, but usually if it's the batt it simply won't idle, warmed or cold

when it dies at stop signs does it jerk?? if so could very well be the torque converter

Nope, just stops running. I'm new to wrench so how hard is the TPS sensor to replace and how would I find out if that's what it is?

JeepinJarhead03 · **Posted:** Sun Jan 10, 2010 1:50 am

got a dollar on TPS

501 · **Posted:** Sun Jan 10, 2010 2:00 am

Thanks JeepinJarhead03 I'll check into it.

JeepinJarhead03 · **Posted:** Sun Jan 10, 2010 2:05 am

they're about 40 bucks

if you have a volt/ohms meter you can check the tps

drive it by advanced or autozone, it may be giving a code without a check engine light

however if ya have a volt/ohms meter you can check the tps in the following way

turn key off and hook meter ground to ground on battery
you'll use the red to probe the back of the connector where it goes to the wiring harness at the tps

signal return wire is usually black, meter set on ohms you should get 1 ohms or less

turn ignition on
check the reference voltage it's usually orange, should be right at 5 volts
then with the throttle closed, check the signal wire, its probably green, sometimes brown/white or green/brown
should be about 1v
then with the signal still probed, roll the throttle slowly until it's wide open, the voltage should change smoothly and max out at about 4.5 volts

i've never had to do it on a KJ but i've done it many many times on other vehicles and it's a pretty standard procedure

heck with scantools now days there's probably a tps automated test

501 · **Posted:** Sun Jan 10, 2010 2:08 am

Thanks JeepinJarhead03, I'll run it by Advanced in the morning and see what they say. I'm new to all this so I'll start there!

JeepinJarhead03 · **Posted:** Sun Jan 10, 2010 2:10 am

no prob! hope it's a quick diagnose

501 · **Posted:** Sun Jan 10, 2010 1:38 pm

Went down to Advanced & Autozone and they both say that their testers only work for codes and that I'd need to take it to a shop. So I'll take it to my local shop tomorrow after work.

501 · **Posted:** Mon Jan 11, 2010 9:39 pm

Replaced the TPS tonight and everything seems to be working right again.

Thanks JeepinJarhead03 for your help!!

JeepinJarhead03 · **Posted:** Mon Jan 11, 2010 10:05 pm

welcome dude! glad you got the problem worked out!

Stalls when warmed up.....

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