I have a chipped ECU on my SI and I can't figure out what's going on and why my car wont crank? I bought a OBD2b to OBD1 jumper harness and it still wont work? I'm stumped on this and it's new to me lol (Ecu/jumper harnesses).

 

More info.
Are you saying it cranked with the stock ECU? Why are you running a chipped ECU?

 

When i bought the car... the guy said that the motor (B16A2) was locked up. So I bought a B16A from my boy and the chipped ecu is tuned for that motor. So i got it and it will not crank with the chipped one. I have the jumper harness to make it work.... seems to not be. Also, before I put the chipped ecu in I had a knock sensor issue. I did the chipped ecu to delete the knock sensor all together.

 

Don't really think it's the ECU but we need to know what's done to teh motor that it requires a chipped ECU.

Is it a no crank or a crank but no start?

 

The chipped ecu is Obd1. A 99 civic SI would be OBD2b correct? anyways does anyone know about this kinda thing.

 

Nothing.... lights dim is all

 

I have two jumpers.... one cranks but no start (Skunk2) and the new one i got today (Zerg) wont do crap.

 

My boy that I got it from said that the chip may be loose... that don't seem right.

 

Also, the B16A motor is 11/1 compression, would that make the knock sensor trip the check engine light?

 

yes

 

All grounds in place?

 

on what?

 

this Japan swap has been such a pain

 

try to get ahold of a p28(obd2) and try starting with out the jumper or the chipped obd1 ecu. knock sensor wouldn't stop it from starting/cranking and yes it can be disabled when the ecu is chipped(if that was put on the chip).

 

I'll type whats on the ecu

 

denshigiken
37820-P30-N01
280-402274
AYJ

 

im just going to fix the knock sensor problem and put my stock ecu in.... get my money back for it

 

so a chipped P30 that's fine as long as it works did you try taking the chip out ? and can you get an obd2 p28 (so no jumper) and try that

 

I figured out the whole knock sensor thing, my brother helped me on the B16A swap and he routed the harness wrong and confused the K/S with the CPS. So that was awesome! The ecu thing is about to be refunded as well... I don't think it's necessary.

 

he did the top of motor and I did the bottom

 

This should have been done from the beginning.

 

Ok does the stock ECU work on the new motor?