p1391

This thing is driving me nuts. My symptoms are a low/rough idle (sometimes sounds like it’s about to die). Also occasionally while driving usually happens around 2.5-3k rpm with about 1/4 throttle it starts stuttering/jerking very badly and if I let off gas or floor it, it quits. I have...

I've spent about 8 months (on and off) trying to get this 2000 TJ (86K miles) to run properly. I'm the original owner. I have read a lot of threads here about P1391 codes. Without going thru a litany of trials, please know that every sensor I can think of has been replaced with Mopar or...

A few weeks ago I had a crank/no start (and then intermittent stalling) issue that I resolved by replacing the TPS and cleaning up some ground leads. I wasn't quite certain I was out of the woods yet, but it drove fine for a couple of weeks. Today it just stalled twice at intersections around...

Hey everyone, I need a little help diagnosing a problem before I bite the bullet and take it into the dealership. About a month ago my 2001 Jeep Wrangler Sport started hesitating intermittently. It would "hiccup" if you will about 3-5 times on an hour drive but wouldnt do it every time. This...

I was out in the desert this morning and suddenly I noticed the Check Engine Light was on. No performance issues, was able to go hill climbing with no issues, no rough idle or stalling. I used a scanner tool and the P1391 code came up. From what I have been reading on the web, this could be a...