What is the difference in a 99 and a 2000 gsr motor? I know that from a 94-95 which has OBD1 and 96-2001 has OBD2 and also that the OBD2 has 2 o2 sensors. But I want to know why every place I see says that 94-95 rechipped ECU's will only work for 94-95 engines. I have a 92Si and a 95 gsr ecu on the 2000 gsr motor and everything is hooked up right. Everytime I get on it and redline it and shift hard check engine light comes on. I think it is because of the 2 o2 sensors but i am not sure. Also I am still running the 2000 gsr engine harness. it plugged right into the 92si engine harness with no modifications. Some body help me.

 

No tech's here???????????

 

95 ecu doesnt look for 2 o2 sensors.
first why dont you find out what code the check engine light is showing.

 

o2 sensor is what code it is saying. I only have one o2 sensor hooked up

 

then try replacing the o2 sensor.

 

the code it is showing is o2 sensor, but it has a brand new o2 sensor

 

the pinning of the o2 sensor might be wrong. ill check on it and let you know

 

i remember a post on here saying the differnece between 99 and 00 has somethign to do with emissions.

 

Which one is it hooked up to? Primary 02 or Secondary 02?

Could be faulty wiring.

 

I think the cx uses a one wire o2. The p28 uses a 4 wire. If yours has one, change it and make sure its wired correctly.

 

are you getting a code 1 or 41 ? or are you getting a 23 ? sounds like 23 which was never wired in the 92 chassis and is not in an vtec civic... knock sensor.

and whoever told you 92/95 vtec ecu can't run a 2000 motor is smoking crack or just guessing.

greg

 

Right, the 92 si harness should not have the K/S wired, but that should make much of a difference.

Dump that code !

 

Ok I am using the 2000 engine wiring harness, 2000 engine, still has the 92 Si wiring going to the ccomputer, 95 gsr computer, i am using the primary O2 sensor, and no the secondary is not hooked up, When the check engine light comes on, It is throwing the O2 sensor code but the O2 sensor is brand new, I swapped it out twice, and it threw the same code. The light only comes on after the car is shifted above 7000, and there is no loss of power that I can tell. I have done a dash swap on the car and it now has a 2000 gsr dash and guage cluster in it, But I am using the 92 si under dash harness.

 

Why dont you tell us what number your engine code is. There is more than 1 and o2 sensor is a general diagnosis. Its only telling you where to look not what to replace.