i bought a 89 civic dx sedan pics up soon. i converted the d15b2 to obd1. changed the intake manifold to a y8 and installed a t3t4 57 trim turbo. i order the etd traction bar and swaped the radiator to a eg. I'm planing on swapping the d16z6 i just bought after i re ring the motor. i started the car and it runns ok but the idle dropps below 200rpm. i still havnt installed the o2 sensor. and am using a po5 ecu. i plan on having the ecu converted to a p28 and chipped. does any one know y the idle falls so low. also is does the charcole cannister have to be connected.

 

did you rewire for the mpfi? if not then you are running on 2 of 4 cylinders.
o and that p05 shouldnt even run your mpfi motor. espesially since you say its obd1.

 

i rewired the car with the boomslang wire harness. installed a obd1 dis and rewired the injectors. the car runs find while its not idling.the car when its cold starts perfectly fine and runs great, after a while it starts to idle low.

 

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

the p05 is obd1, will work fine, have you adjusted the idle yet? is the y8 manifold a auto or manual?

 

the y8 is manual. as soon as i turn on the car it idles at 2000rpm and after driving it the idle will not stay stable at 700 rmp it is well belowe and even turns off