have an 04 grand cherokee limited 4.7 would die after a few min. would not restart until it sat for awhile. no rpm on scanner checked crank sensor tested bad replaced and now missing on 4 cyl. can anyone give me any ideas

 

could be solenoid?

 

the vehicle is running? after R&R crank sensor (CKP) yes
the CEL is on- coding p0304 only - yes? can you feel hear miss?
the vehicle is STOCK no aftermarket BS?

START SIMPLE
ck #4 inj wiring, spark plug and secondary wire
if you cannot feel misfire clear code see if reapears ...
if you feelmisfire ... do not clear-
knowing answers above will guide us.