Hi, my 96' Grand Cherokee start and run fine when it's cold. But, it start losing power when driving for a while. It won't die, but it won't go fast no matter how hard u step the padle

SOURCE: Not accelerating when stepping on the gas

throttle position sensor would cause this. Is there a check engine light

SOURCE: 1996 Jeep Grand Cherokee stalls when brakes are applied

My 2000 Grand Cherokee had the same problem, without all the sputtering, it would just die approaching a stop. We could only keep it running by slightly pushing down on the gas petal when coming to a stop. I replaced the Throttle Position Sensor, but that didn't change anything. A new mechanic I found replaced the Idle Air Control Valve, and we've had no problems in a week.

SOURCE: my car starts and then dies

sounds like a security issue they installed a factory security system which will prevent the vehicle from running unless its reset go to passenger door lock turn key twice it worked for me after chasing other problems for a few hours

SOURCE: 1993 jeep grand Cherokee...stutter in drive at low rpm

Hello;
Have you checked your fuel pressure and volume? You may not be getting the ful sufficiently to the injectors. Also, change your fuel filter if you haven't already. Is the check engine light on?
Thanks;
Rich
RPM Northwest

SOURCE: 99 jeep cherokee sport 4.0l 6cyl voltage will go to 19v

The problem sounds intermittent, if you put volt meter on the battery while it is at that 19volt mark/reading(on the gauge cluster) you will be able to see if it is true. If your alternator is really charging over 16volts the lights should be getting brighter then usual and/or they are burning out. Find out ASAP, if the alternator has a defective voltage regulator, it needs to be replaced. Prolong use will damage components.