My son has a 91 civic that has had a dohc zc engine swapped in.
The ecu is blinking code 4.
I believe it is a 3rd gen dohc zc engine.
The car is still obd0.
The cam sensor (cyl/tdc) resistance measured 890 ohms ( suppose to be between 600 and 1,000), so that seems okay. Checked continuity...
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