Electronics won’t let me start my Z and OBD port and ECU won’t connect. Need a mechan

osburnrs

Wow! I’m really impressed and wish you lived near me. So I thought I was smart but this has humbled me greatly. So in my ignorant capacity, what coils are you referring to? The coil packs at the plugs or something else? There’s no doubt that the ECU has lost its ground because it’s hanging loose on the passenger side because it’s so hard to keep putting in and out. Probably too late to save the old ones but in my defense I did run jumper cables to ground the ECU in its unmounted state. Thanks in advance for the help and new used ECU is on the way.


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2013-Z33

Yes, the ign. coil packs at the spark plugs. The lack of ECU case ground will not cause this problem, but is needed to shield the ECU from EMI noise. Nissan has moved away from their old practice of running the ECU's grounding pins straight to the engine block. There is now a longer "chain" of grounds, where the ECU is grounded to the body under the dash and then the engine block is grounded to the body and finally in this case the coil packs are grounded to the front cover.