hey guys i have a 93 jeep cherokee that likes to die when it gets to operating temp. it only dies when in gear and i press on the brakes to stop or when i go to take off. i have replaced the crank shaft position sensor and the whole distributor with the cam shaft position sensor. i have replaced the asd relay and it still dies. when i first got the jeep it would just die so i replaced the crank shaft sensor and then it would spit and spudder and back fire really bad so i replaced the distributor but still did it so i took the new crank shaft sensor back and got another new one and now its back to the dying thing. any one out there got a solution to my problem im all out of ideas. also the fuel pump is putting out 47 psi in the fuel rail so not that, plugs are good to.

 

This may sound weird but I know of more than a few folks who had this problem and it was the bolts holding the trans to the engine were loose. Since the CPS is mounted to the trans and the CPS is triggered by the engine's flywheel, the movement between the two caused an interuption to the signal.

 

Crazy thing, mine did that just from an exhaust leak for a while.. Threw off the o2 sensor enough that it killed it every once in a while at a stop sign

 

ok ill check the flywheel bolts today to make sure they are not loose. and it cant be an exhaust leak cause it has a brand new header and full magnaflow exhaust freshly installed.

 

I figured it probably wasn't, but I just wanted to throw it out there as a possibility

 

Moved to OEM Tech.

 

thx arorton i appreciate all the help i can get i have used all my knowledge on this thing

 

Not flywheel bolts. The bolts that hold the trans to the engine.

 

Check your fuel pump again. Check it 5 or 6 times. Bc Ive had the same problems as you. And my fuel pump was dying out when it got hot. I had 53 lbs at the rail and then I shut it off and check it again. it was barely able to idle and had 12lbs at the rail. Once it get's over 160* it would start acting up.

 

if it acts weird after warming up period, i would suspect that pre o2 sonsor is broken.

 

the o2 sensor isnt tripping any codes and after it dies there isnt any spark but if i let it sit for a bit the spark comes back and fires right up. i checked the trans bolts that bolt to the engine and the flywheel bolts all tight even checked the mount bracket bolts all tight. i just changed all spark plugs and wires again regaped all of them to .035.