So...my 2000 xj 4.0 has been stalling out intermittently..sometimes when I'm parked and idling or it has even happened while driving on the highway.

After checking on here i thought it might be the CPS...so i replaced it...still happens..

then i noticed my gas gauge would be at half a tank then next time i turned it on it would be at empty then back to half...so i replaced my fuel pump assembly.

What else could be causing this stalling?

 

is the gas gauge problem fixed?

Also did you try cleaning the throttle body? Mainly the idle stepper on the throttle body.

 

also what happens when it stalls are there certain things going on when it does stall ie. low idle, surging idle, higher than norm temp., etc...

 

Pump...sending unit....2 different parts....The pump and the sending unit make up the WHOLE FUEL PUMP unit. Don't know if you can buy them seperately, I can...but...change the sending unit, and your gauge will straighten out. As far as the cutting out...maybe thats your fuel pump telling you its tired. I just replaced an ECU for one doing just that, after 4 mechanics couldn't diagnose it. Let us know....

 

on 1997 and up you can only buy the whole assembly

 

Gas gauge is fine now.
I just put in a new bored throttle body a few months ago

 

When it stalls it just shuts down. Sometimes when idling at a stop light rpms will drop like it's goin to stall then it catches its self and the rpms will go up. Sometimes enough to where I have to step on the break harder to keep it from moving forward

The stalling has also happened twice that I can remember while I was driving 40+ mph. Had to pull over the first time next time I just put it in neutral and restarted.
And it always restarts with no problem right away

 

I replaced the whole assembly this week it has done it less but has still stalled a couple times

 

My 98 did this and it was the tps, now all good

 

which part was yours doing...ill prob grab a TPS sensor next time i have spare cash..I just finished my masters and am looking for a job so money is tight right now.

 

The strange stalling and surging and random dieting even at speed.

 

Im having the same issue on the 93 I just bought. The po sold it cause he couldnt figure it out after replacing the tps, cks, iac, and a few other sensors. I havent figured it out yet either, I would probably be more intrested to.if I had the money lol. The ****ty part is for some reason it wont start in n, only park