Stalling on warm up cycle

[Struth]

I've had this issue intermittently for over a year now and thought it would just be a matter of replacing the TPS, I was wrong...

...after replacing the TPS I still have an intermittent stalling issue, that is until the motor reaches operating temp and then it idles OK?
I was told to have the injectors cleaned and see if that fixes it but does anyone here have any other thoughts on what should I check or replace next?

01 Manual TJ stock 4.0L K&N 160,000k 3" 33x10's 4.10 lower long arms SYE 4wheel disk's

[WH_5.7L]

http://www.jeepforum.com/forum/f9/je...d-out-1357978/

Give this a try...

[nitrobrent]

Also don't think that because the TPS has been replaced , that its not the issue.
Have heard of heaps of dodgy new TPS's.

[Classic Boy]

I have read that the 4.0L engine can be a little unhappy with platinum plugs on some topic threads on the US forums.
Yet my daughters 4.0L WG had well used copper champion plugs when we purchased it at around 177,000kms, in the subsequent service I swapped in Autolite double platinums and they were faultless for 90,000kms they were only swapped out to troubleshoot another engine problem which turned out to be a worn out cam sensor drive, not the sensor the actual drive unit suffered a bearing failure causing the cam timing to scatter.

Recently I swapped in Bosch Platinum plugs and the car is now going through 300,000kms without and spark plug related issues.

It did sometimes stall in the hot weather a few summers ago only when the A/C was running but cleaning the IAC valve fixed that fault.

[Struth]

Thanks for the responses. Guess I'll replace plugs, clean the IAC valve and its high time the injectors were cleaned, I'll post back when that's done.

Funny thing is, since I changed out the TPS I seem to be getting better acceleration, also, when stopped at the lights it either stalls or drops to about 3 or 400rpm and juuuuust keeps ticking over, again, only when warming up and to be clear, it's running really smooth, even when the idle does drop to 300rpm

rant...
So, it feels a bit like I'm driving my old V8 SS Hatchback, (less the 350 bhp that is) when you come off the juice it's like standing on the brakes, right down until your almost stationary. I need to be really precise with gear changes but I like it, it's more fun to drive.
I'm guessing whatever's not working correctly must hold the butterfly open a little to help negate gear changes by keeping the revs up, or rather, stopping the revs from falling too quickly?

If it wasn't for the stalling issue and provided you don't need to come to a complete stop, I'd prefer it the way it is, you get more compression braking from the 4.0 when you come off the skinny pedal and that's handy offroad and more fun to drive on road.

[Struth]

I cleaned out the throttle body (was filthy), replaced the TPS and installed new plugs.

The stalling has stopped but now the engine's running rough during the warm-up cycle" and when I first start it it's over-revving to about 2-2500 RPM.
Once it's at operating temperature it's mostly fine again.

I'm hoping to get the fuel system checked and the injectors cleaned next week, hope that fixes it.

[Cam84]

Does the jeep motor have an IAC valve? Sounds like an IAC valve or equivalent. They gunk up pretty frequently on folks who use throttle body cleaners. My old Mazda had the same symptoms till I replaced the valve. On inspection the old one was full of dried crud.