moike

i have a 98 hatch with a 2001 b20z motor and used the DX civic wiring harness...

up until today i have been using my d16 non-vtec ecu because that was the only one that made the car drivable. today i bought an obd1 LS ecu (chipped for fuel maps i hear) and the converter harness so i could be OBD1 thinking this would solve my problems.

after several miles of testing the new ECU it was obvious the D16 ECU was better...by far. the D16 ECU was real smooth and made the car feel as quick as it should be. the OBD1 ECU however pulled allright up until around 3k-3.5k RPM and then was a dog from there on. It pulled less than I would expect from my old SOHC motor.

Here's what I've done....
- I moved the wire on the A plug for the IACV so that's not the problem.
- I also swapped the necessary plugs with an Integra harness so they would plug in and I extended others like the Temp. sensor on the intake manifold.
- I checked to ensure the IACV is working by unplugging while the engine is running and there is a big change in the idle.

CEL's: When i try to check my CEL's i get much faster blinks than I have ever seen. It is so fast that the light almost doesn't light up all the way. If these odd blinks are accurate though...i have a 43 (Fuel Supply System defective or malfunctioning fuel supply system) and a 5 (MAP Sensor mechanical problem / disconnected piping)

any suggestions would be appreciated? i'm out of ideas.

moike

^ i know it's a long post but i think it answers most of the questions people may have about the set-up.

thanks.....any suggestions are welcome.

AL ASPIRATED

hey how much did you buy ur b20 for? and is it from a shop??????? cause i got mines for $1200, for jus da longblock.

Thanks

moike

that's about right, i bought mine out of this and it was also $1200 with some stuff. i checked carfax and it only had 24k miles when it was wrecked.

cliff666

i am also curious about using a dx ecu on my ls swap someone told me b4 it has better top end but i am not exactly sure why or whats different in the fuel air ratios someone please tell...

moike

mine runs pretty strong with the DX ecu after 4k. it probably is a little lean but there's no detenation and the plugs are just a little grey.

i hear the LS ecu has more aggressive fuel maps.....what exactly does that mean?