1994 Jeep Grand Cherokee

Any check engine light? If so, scan computer. Send me the codes. If not:

First check for spark at the plug. If none, check that power is supplied to coils (check fuse/relays, use voltmeter and probe connector at coil). Then check for signal to fire at coil.

If spark is good, next check for fuel. Check fuel pressure, clogged filter, bad regulator, injectors firing/clogged.

If good spark and fuel, check cylinder compression. You may have a mechanical issue that needs a rebuild.