What is the difference between the obd1 and the obd2 ecu's?

 

i don't know every single change, but i know that obd2 is newer, and has more sensors and more cel codes.

 

well its got to be better they wand an extra 2 bills for it on a complete engine swap.

 

well, it's more expensive, but not nec. better. i believe obd1 is easier to swap, and that's why obd2 is more expensive.

 

about 10 sensors and 40 more CEL's.

 

You can run an OBD2 engine with an OBD1 ECU. That's what I did. My B18C1 is from a '97 and has a bunch of sensors that plug into the ECU, but just don't get read. It is MUCH easier to swap an OBD1 because you have to add wires for new sensors on the GSR motor (or whatever swap) and it makes it hard to please every single one associated with OBD2.

I only threw one CEL and it was because my IAT was bad.

there really is no reason to go OBD2 unless your car is already OBD2 and that would suck imo.

HIH

 

OBDII is more difficult to work with cuz of the extra sh!t (sensors yadayada)

 

You won't find chips for OBD2 either, even hondata requires an OBD1 ECU. The OBD2 computers comply with tougher 1996+ emmissions standards. OBD2 will at times, adjust the engine fuel/timing to reduce emmisions, say in the case of a bad 02 sensor. You can reset it back to stock for a time by resetting it.

The internals have not been as comprehensivly reveresed, as have the older OBD1 series stuff. Also electronically the OBD2 ECU is much more complex, and it uses an expensive CPU, making chipping even more involved.

-PHiZ

 

PHiZ is right but the main difference between the two is:
lets just say that there is a faulty o2 sensor in two different cars, one OBD1 and one OBD2, the problem with the o2 sensor will only have to occur once (OBD1) for the check engine light to come on, on the other car, the o2 sensor problem will have to occur twice(OBD2) in order for the check engine light to come on

 

get an obd2 motor, but run an obd1 computer if your chassis is obd1. my car is obd1, my motor is obd2, my ecu is obd1, so i only read the obd1 sensor.

the gain of the obd2 motor??? lower miles, and it's running in obd1 so whatever power loss that's associated with obd2 (i don't think there's a power loss just a myth) it's not present cause your od2 motor is running obd1

-obd1kenobi