Shuts off while driving

Welcome to 2CarPros.

I'm not sure what screws were tightened. However, I have a few questions. Does it restart right away after it stalls? Does it seem to happen only after the engine is warm? Is there anything that seems to cause it to happen?

My first suspect if it happens only when warm is the crankshaft position sensor. Take a look through these links. The first explains what the sensor does, the second discusses symptoms, and the third explains how in general one is replaced. The one on your Jeep is a little different than the one in the link, but I'm adding it to give you an idea.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

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If you feel the symptoms discussed in the above link mirror what you experience, here are the directions specific to your vehicle for sensor replacement. The attached pic correlates with the directions.

1998 Jeep Truck Grand Cherokee 4WD V8-5.2L VIN Y
Procedures
Crankshaft Position Sensor Service and Repair Procedures

REMOVAL

Crankshaft Position Sensor

pic 1

The sensor is bolted to the top of the cylinder block near the rear of right cylinder head.
1. Disconnect crankshaft position sensor pigtail harness (3-way connector) from main wiring harness.
2. Remove two sensor (recessed hex head) mounting bolts.
3. Remove sensor from engine.

INSTALLATION
1. Position crankshaft position sensor to engine.
2. Install mounting bolts and tighten to 8 N.m (70 in. lbs.) torque.
3. Connect main harness electrical connector to sensor.

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Let me know if this helps or if you have other questions.

Take care,
Joe