310HPS2k

Hey guys I just finish swapping a jdm D15B

I am running the P28 on my del sol.

The car starts up fine. It is throwing code 41 and running really rich, little black smoke out the back and you can smell it.

It idles around 7-800 rpm but when i rev it up it drops so low it studders and feel like it would just shut off.

Any idea? I know the code is for O2 sensor or something like that, but are these the right symptoms for it?

thanks!

Former User

Well, fix the O2 sensor code as this affects both performance and mileage.

But I think the idle issue might be resolved by cleaning the IACV, or possibly replacing the PCV valve.

310HPS2k

On my K series I had to clean out the IACV also, its usually cuz the motor has been sitting out for so long.

I will give that a try.

310HPS2k

Cleaned the IAVC it stills idles weird, feels like it drops too low, It almost stalled out at the light a couple times.

310HPS2k

CHanged out the o2 sensor with a brand new Denso 4 wire one and still throwing the code 41.

Idle is still weird.

Any thoughts?