morenolindo

I Placed a B18c1 in my 99 civic hatch that had a D16y7. i have a obd2b to obd2a harness to conect to the ECU. I removed the foward cat and installed a DC header with a foward 02 sensor before the cat and one o2 sensor imulator for the second .The installation went flawless Except the car wont stay on when first started if cold. i removed the throttle body and cleaned all the tiny grooves, i also removed the iac valve and cleaned the filter. after adjusting the iddle screw the car runs rough when cold but i still have to give it gas when first started till it finally maintains it self running. I just purchased an after market TPS but i dont think there is anything wrong with the one i have someone please help. I am running out of ideas

cleanEK

throwing any cels?

morenolindo

Yes i am o2 sensor, tps and iac. Thats why i placed a imulator and removed the iac and cleaned it. but i havent read to see if any got removed

morenolindo

i am out of ideas some one help me

Fabrik8

Have you checked the adapter harness wiring, and any wiring changes you made during the swap? You really need to do a resistance check between each sensor connector (the sensor doesn't have to be plugged in) and the ECU connector. That means keeping everything in-circuit, including the adapter harness. You're looking for broken wires or incorrect harness pinouts. It's an easy thing to do, and very important if you're having problems with a swap or new harness. After you've done that, and you haven't found a problem, you can then start testing/troubleshooting the sensors themselves.

FYI, O2 sensor emulators don't always work properly, but I doubt that's the problem you're having.

And keep the number of thread bumps down, give it some time first..

Tim-Tim

you can try resetting the ecu. disconnect the neg. battery cable for 10 mins. should reset codes in the ecu. but they will come back if the problem persists.