on a jdm auto p72 ecu obd1 is the vtec wiring the same from a p28 pinout? im having problems with the vtec solenoid its chowing code 21 as soon as i put the key half way withought having to turn on the car i know i did the wiring right unless its located differently on this ecu???

anyone have any ideas? i tried a different solenoid also an same thing is happening.

 

bump

 

ill assume its too jdm for honda tech lol

 

Pinouts should be the same, OBD1 Automatic P73s have an extra plug for the TCM, but other than that the other 3 plugs should be the same.