hello we have a 98 mack ch-613 truck with a E7-460 engine. we bought at a auction as is with the engine not running, was told had a possible bad engine electronic ecu. did read the fault codes and it did have 2 codes relating to the ecu controller and one for the data link. checked for voltage and grounds at the ecu according to the wiring schematic. all looked ok there, installed a good used ecu and still no start. still have same active fault codes with the used ecu. do have 80 psi fuel pressure, cracked all fuel line one at a time at the cylinder head and had what i think is good fuel there plus some air as they had ran one fuel tank completely dry, but i believe i have gotten all air removed. no black smoke at the exhaust. sometimes it will hit a few times but by the time you let off the key it has died. and by the way it will start and run on either just fine. any suggestions will be appreciated. thank you.
