I have 2 months fighting with a ECU error #9 in a P72 B18C1 with Hondata. I know that the error #9 is the No. 1 Cylinder Position (CYP).

I make all the manual troubleshuting, cut the hondata jumper (return to OEM), n-check the ground wires, change the distributor with other car, change the ECU, etc, etc, etc and the code remain. I lost my time and mind with this problem...

The car have good iddle, start good, I dont have clue with this.

PLEASE HELP, ALL IDEAS ARE WELCOME


Thanks in advance,

Dariusz

 

it sounds like the obvious, (cyp) sensor

 

As you can read in my post, the ECU and the Distributor is changed (the CYP sensor is inside the Distributor).

 

Copied to Engine Tech were some awesome gear heads may be able to help! :thumbup:

 

Thanks a lot

 

I'm lost with your explaination, Don't slam me on the next post but how is anyone going to know what dist. you have? what yr? Here's what I would do if I was you
If you have a wiring diagram(if you don't please get one), find the wire or wires to the cyp sensor at the dist. with the power off run a continuity test from the wire out of the dist.(if the cyp sensor is in there) to the same color wire for that sensor going into the connector for the ecu. This will tell you if your wires are okay, i.e. not pinched or open... I'm going to assume that you are going with that other ecu to get rid of obd2????

Why dont you swap back to the obd2 ecu and see what that code sayes after that?
It might say like voltage high or low or open or short instead of the lame obd1 code.

Just my first thoughts though, stuff I would try..