i have gen2 ZC engine in an '89 CRX Si. I changed the ECU, but it came up code 4 (crank angle sensor). On this engine CAS is inside the distributor, not near the exhaust cam. the car won't rev past 3200 rpm. i tried wiring directly to the ecu, matching color for color, the computer will not read sensor. i think i need the wiring diagram and/or way to bypass the computer. 7 pin distributor, 7 pin harness.

 

you looking for the wrong sensor to be bad. use sig and get some help from it. You looking for code 9 if the CYP is bad your CAS is totally different. I bet the windings in the sensors have gone bad.