Author Topic: TJ idle surge 2.5L (Read 783 times)

RedApe · « **on:** July 12, 2007, 09:54:12 PM »

Hi guys,

So, this one is starting to get annoying. 97 TJ, 2.5L

Symptoms:
Idle surge is not quite accurate, really. At true idle, there is little to no surging.
It's most noticeable at launch, off the light/from a stop. 2-4 obvious surges in rpm before coming into power.
I'm almost sure it's a sensor, just need an idea of which I should replace first.
Has anyone seen this/have idears?

Did a board search, and Googled till the Hummer's came home... :lol: :wink:

TIA,

lugnut8 · « **Reply #1 on:** July 13, 2007, 09:56:51 AM »

Same thing is happening on my 2.5L, but much worse. So far I have Replaced the rotor, cap, plugs and wires, AND the TPS. But the problem is still there, just a little milder.

So she is going in for a diganostics test on monday. Ill let you know what they come up with. :x

EVOLUTION · « **Reply #2 on:** July 13, 2007, 10:14:54 AM »

Any idle problems I've had with my TJ were always because of the TPS or an oxygen sensor. It's a $40-$60 part... dont know if this helps, but it wouldn't hurt to check them out. Even just cleaning them can sometimes work.

Good luck!

RedApe · « **Reply #3 on:** July 15, 2007, 01:22:57 PM »

Thanks for the input....
I've already done an O2 sensor....TPS will be next on my list as well.

RedApe · « **Reply #4 on:** September 23, 2007, 09:17:54 AM »

Just to update on this....TPS resolved ALL symptoms. Thanks for the feedback!

Author Topic: TJ idle surge 2.5L (Read 783 times)

lugnut8