Never thought I’d be the one posting here, as I almost always find a fix from someone else, but I’ve ran into an issue.

For starters, I have a 2000 EX sedan with a d16y8.

I manual swapped the car as the automatic transmission was failing. I replaced the harness, the intake manifold, the ECU and the transmission from a donor car.

yes, the intake is a 99-00 intake with the air injection ports and the big IACV on the IM instead of the throttle body.

I did it this way to keep it as OEM as possible with minimal wiring/hackjob activities lol.

my concern is, my idle is rough and the car runs terribly. It wasn’t doing this before I manual swapped.

I have checked my coolant levels,

bled the system

replaced the IACV (granted, with a Duralast unit, however the problems didn’t change)

And there is not a vacuum leak. I sprayed with bc and unplugged and replugged every line.

I have not adjusted the idle screw.

honda wants a new OEM IACV for $500. I don’t got that kind of bread.

but the car stutters while driving and it idles rough. Any help appreciated.

code is P0505. Thank you!

 

How did you deal with the wiring changes necessary for the IACV ?

 

by swapping the automatic harness with a manual harness and plugging it in.