Hey everyone!! Been a while since I’ve been on here. If this was addressed in another thread just direct me. Jeep will accelerate when cold, but after a couple minutes of driving acceleration is sluggish and jerky. After giving a code for the coolant temp sensor, it hasn’t given any more codes. I can hold the brake and give it gas and won’t feel any misfire.
98 Cherokee classic. 4.0. Automatic

Parts that have been changed:

coolant temp sensor
distributor cap and rotor
plugs and wires
02 sensors
TPS
MAP sensor
idle sensor
injectors

thank you

 

What's the condition of your catalytic converter? Clogged or fouled catalytic converter can limit/choke your engines performance. Usually when it's completely clogged you might get a little rpm out of it but ultimately it limited.

You could remove your upstream O2 sensor to check this

 

Throttle Position Sensor?

 

Try cleaning your throttle body.

 

Just had a new catalytic converter put on and still running bad. Cleaning the throttle body is my last resort

 

Changed that already

 

Found cylinder 1 has 85 pounds of pressure and cylinder 2 has 110. The rest are around 130-140. Time to go further down the rabbit hole