i just got the car and it already had the motor in it. i need to go get it inspected but the dlc does not connect to the computer. pulled the ecm and it has the jumper harness on it. how do i know if it even has an obd2 computer to communicate with.

 

It has an OBD2-1 jumper harness? If so it'll never connect or if you have a JDM OBD2 ECU it'll never connect

http://www.hondata.com/techecuid.html

 

done more research and it is a damn obd1 computer, now my question is does anyone know if the one out of a '00 civic si will work and if so will i loose any accessories, and will it need a jumper harness. if i need the jumpr where can i get one at?

 

Yes it will work, you wont lose anything and you wont need the harness because the ecu would be obd2....

 

thanks a bunch guys, i knew y'all would come through for me

 

ok, got an ecm out of a 99 civic si, havent really played with it yet or hooked the scanner up but i did plug it in just to see what would happen. car did start and idle (barely) but would not respond to any throttle input. idled very low but i am currently having issues with a wondering idle so thinking something is up with the iac. is there a dif between the distributors on a motor that is run by an odb1 ecm and the obd2 ecm. same question for throttle position sensors as well? thanks guys

 

No difference in the distributors or TPS.

 

Is the check engine light on?

 

it did come on if i get time today ill plug in the genisys and see what is and is not reading and what codes i have

 

You sure it's a 99 si ECU? What does the code on the ECU read? It sounds like someone sold you a DX/LX/CX ECU. Those have a 3 wire IAC....so your car would idle like junk and respond sluggishly to throttle input.

Also, OBD2 injectors are different. What injectors are on there?

 

It's a p2t-a11 ECM. I don't know what injectors it has. Just put a crank fluctuation sensor in and that code has gone away now. The only code in the system is a p1259 variable valve timing above upper limit. Will that keep it from starting. Right now the car will start idle up then die after the ECM has been unplugged for awhile. After that first time it just cranks

 

Oh and how do I know what injectors I have

 

got it running, have no signal from the pcm to turn the fuel pump on but i got that fixed.