Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: RedApe on July 12, 2007, 09:54:12 PM

Title: TJ idle surge 2.5L
Post by: 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,

Title: TJ idle surge 2.5L
Post by: lugnut8 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

Title: TJ idle surge 2.5L
Post by: EVOLUTION 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!   8)

Title: TJ idle surge 2.5L
Post by: RedApe 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.

Title: TJ idle surge 2.5L
Post by: RedApe on September 23, 2007, 09:17:54 AM

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