Hondata

Hey

We have a D16A9 (OBD0) with conversion harness to a OBD1 Ecu with S300 (Ecu is P28). Everything works except we are getting a CYL sensor error (S300 shows code 4 CKP). Engine runs but in limp mode. Cant rev past 3100.

Am using the D16A1 cal.

The Engine itself has stage 2 cams and the head has been milled. We also added adjustable cam gears. Ignition timing is dead on and so should be the exhaust cam but still am getting the error.

The sensor is OK 880ohm ....should be arount 700-1000. Also the wiring is correct. We tried swapping the wires and nothing changed.


Any ideas ?

OK can anyone tell me if the CYL sensor value is set by the ecu or S300 ?

Looking at a 92-95 service manual and the CYL sensor value should be 350-700ohm. Could this be the issue ? or does the cal. file for the D16A1 have the Cyl value set to 700-1000ohm ?

This will have nothing to do with the calibration. The sensors themselves are what send the signal to the ECU. It will either be a problem with the ECU or the distributor or the wiring. Try the ECU in a known running car and if the problem goes away you will know it is wiring or the distributor.

Spunkster wrote:This will have nothing to do with the calibration. The sensors themselves are what send the signal to the ECU. It will either be a problem with the ECU or the distributor or the wiring. Try the ECU in a known running car and if the problem goes away you will know it is wiring or the distributor.

Yess but if the ecu is from a car that has the CYL sensor input range of 350-700ohm for good sensor. Then the old type CLY on the D16a9 would be bad as the stock ecu has a range of 700-1000ohm for a good sensor and the sensor itself is giving out about 880ohm. The old ecu did not give a cel.

The wiring is the same OBD0 as the engine is. There is just a OBD0 to OBD1 adapter. Yes wires have been checked many times.