azmarkus

The Z got hot and burped up some coolant thru the reservoir, not leaking from anywhere; new coolant, new water pump, new heater hose assembly. When I took the car in, the mechanic advised it threw some codes including a 'code 51' which is some kind of prom error (?). He advised that may have contributed to the overheating problem by causing the engine to run lean (also had an intermittent injector pulse problem). They did a thermal scan of the radiator and it was showing 20-25% down on optimum efficiency, which, while a noticeable amount, should not have contributed to the overheating (even here in the AZ heat...it's around 105 or so). He recommended doing a in-depth diagnostic before they start replacing proms and/or looking at a replacement radiator. Looking for any advice or guidance as this is way out of my league.

94 Z28 M6
Completely stock except for a CAI

Formula350

iTrader: (3)

51 Shows to be the PROM error, but I think that only pertains to ECM cars. You don't have an ECM, but a PCM, where the EEPROM is a permanent feature of the PCM.