r/CherokeeXJ • u/Ok_Revolution_2827 • 5d ago

NEED HELP

So I need reddits help. Car was struggling to get up some hills and then randomly car dies. My car has only done this one other time in a parking lot. Both times my car dies it has started right back up with no issue. What could the problem most likely be . Fuel delivery ? Crank shaft position sensor ? Throttle position sensor. IAC valve ? Vacuum leak ? Serpentine belt or misfire ? Idk I need help . I must mention I replaced the IAC and TPS a while ago and still had this weird issues. Please let me know something

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u/clevertalkinglaama 98 Limited, 3" Lift, 32" Tires 5d ago

What is the year and transmission? If it's a 97-01 you can get a Bluetooth obd reader and the torque app to get real time data from you sensors. The closest issues I've had to what you are describing were caused by a flakey 02 sensor that gave normal data sometimes but every so often the signal would drop by 20% or so and cause it to run like crap but then it would go back to normal after a while and run fine again. I finally figured it out with the app / reader. You can also see real time data from the TPS, temp sensors and Map sensor to make sure they are working properly.

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u/Ok_Revolution_2827 5d ago

I got a 99 automatic. Thanks

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u/clevertalkinglaama 98 Limited, 3" Lift, 32" Tires 5d ago

If you have no check engine light, I would suspect the 02 sensor. Temp sensors, coolant and intake air temp can also give bad data that can cause issues without CEL. Best way to troubleshoot is with live, graphed data.