MDS & Tach ?'s
you dont have mds on a 4.7 as hunter said.
you could take it to the dealer and pay diagnostic time and they will perform a actuator test of the cluster and ccn to verify operation of the crank sensor and tachometer.
you could take it to the dealer and pay diagnostic time and they will perform a actuator test of the cluster and ccn to verify operation of the crank sensor and tachometer.



