DDEC ECM codes
Tom
Before you spend any $, check your connections from harness to ECM. These are Delphi connectors and extremely efficient at keeping dirt and corrosion at bay however, corrosion (even not visible to the eye) can occur. These signals are quite low and a voltage drop across the terminal will cause the ECM to display a fault. In the case of higher energy signals, the injectors can experience long response times and not fire at all. Remove the 4/5 wire connectors by carefully spreading the latch catch and pulling, in the case of the 10 and higher wire count connectors there is an 8mm (if my memory is correct) fastener in the center. Unscrew it and remove (do not over tighten when reassembly, you do not want a broken terminal body). Spray with a contact cleaner and apply a terminal grease then reconnect.
Hope this helps
Gordon
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