i have a 90 integra sedan and i bought a obd1 phareable ecu and a obd0 to obd1 jumper harness. i unplugged the clips on the ecu and tried to hook up the new ecu but it didnt fit. but the obd0 ecu looks nothing like the new ecu. am i crazy thinking its the ecu or is it not ?

 

if your trying to plug in your new ecu without the jumper harness it will not work. plug your jumper harness into the engine harness or your ecu and just connect the plugs the obd0 and obd1 plugs will not interchange