97 Jeep cherokee sport won't idle

50-60 psi going down the road lower at an idle sometimes the oil pleasure switch on the engine go's bad giving you bad readings I'm a big jeep guy so any other ? let me know

did you clean out the throttle body? a dirty throttle body can cause hesitation and stalling at idle at times.

sounds like a fuel problem. when was fuel filter changed last! if filter is ok, remove and clean the idle air control it may be sticking. this is what controls idleing, on todays cars. ( IAC ). good-day ! there is another thing you can do. clean out around throttle plate of throttle body and make sure aircleaner is ok. this should help!!

idle air control valve, maybe.

first will say that you have a good amount of gas in the tank.second o2 sensor does not contol idle or does the map sensor.the tps sensor and if it has a idle air motor.they can control idle other than the computer.

Check your throtle postition sensor. It monitors what postion the throtle is at and sends that info to the ecm. It will go bad and cause that problem.

Get a code test done and see what you find...sounds like a bat throttle position sensor but without proper testing, I would not run out and buy one,

any leaks in intake or exhaust upstream of the sensors, sparkplug condition and engine controls/sensors for out of range operation (including fuel pressure and condition of regulator)
IAC should be cleaned and checked as this can cause poor idle and shut down. I'm not saying not to change O2 sensors, but unless everything else if OK, it probably won't help.

i recommend cleaning the throttle plates. they are located unter the intake hose form the engine to the air filter housing. if you open them with the engine not runniong you will see they will be covered in carbon. use a good carb cleaner and a rag to wipe them clean

This has happened all of a sudden?
It is sounding like it is starving for fuel...

First we will check for bad fuel. A GOOD Gasline Antifreeze can get the impurities and water out of the Gas. Get a bottle and pour the whole thing in the gas tank, bounce the car around to mix it with the fuel. Start it and let it run for a little while so see if it smooths out. If does not help then look at replacing the fuel filter as it may be clogged.