ok so im hoping someone can help me. so to start today when i put my jeep in reverse after driving it to town it started to pudder and almost stalled and threw a check engine light. now the one problem i have is i cant get any scanner to read the codes so. so i unhooked the battery and hooked it back up check engine light gone. drove it and everything was fine. after sitting for half the day started it and backed up everything fine after drving for a hour went to put it in reverse started to pudder and stall out again check engine light 2000 cherokee 4x4 4.0 Automaticthanks in advance

 

What happens when you try to read the codes?

You only get the sputtering and stalling in reverse, shifting to D is fine? What happens if you unplug the connector for the NSS after it's started and shift to R? Still sputter?

 

No scanner will communicate I havnt had time to figure out why and drive is fine no issues drive it for a few hours no problems just reverse?and i havnt tried unhooking the neutral safety switch yet i will

 

Update today after sitting all night started it put in reverse started acting up I've put it in park and neutral and rev it everything seems fine drive in first second third and drive everything is fine its only in reverse that it starts to run funny.

 

I would guess there is a wire rubbed some where and when in R the drivetrain "torques" the other way and the rubbed wire touches metal

 

You think its external or internal.?

 

Wait so I'm curious. When you put a scanner on, it doesn't connect?

 

I have this problem. My reader is Maaco and works on every other vehicle I've tried it on.

 

So the scanner is no good then. Was curious if the Odb port was no good.

 

I've gone to advance and tried using the one they have then I went to a garage and tried a snap on and the other one they have they show no indication of connection