I have the big brother to the 5.9 ,,,8.3 12 valve.>>>Dan ( Love this engine!!)
In 1998 the "C" became a 24 valve ISC electronic....I have the last of the "C" 12 valve engines nested in an American Tradition that gives me great power,,reliability,, and 10 miles to the gallon.. The ISC gets about 7.5 with the same load and has frequent sensor issues... >>>Dan
BH,, The "C" and the ISC have different pumps,, the "C" has the Bosch P7100 and the ISC uses the P44 Bosch. The 44 is obviously electronicly controlled and uses a "lift" pump that is problamatic,, the 71 pump is mechanical and needs no lift pump.>>>Dan