I have a 2000 si (b16a2) in a 97 del sol.
My idles rough like a couple hundred rpms up and down.
I am throwing codes for IACV (14) which I changed no help, code still illuminated.
And code 41 for primary o2 sensor which there is no bung for it.

Main problem is car idling shitty and bad gas mileage which is causing me pain lol.

Any solutions for this?

 

primary o2 sensor is not an option for your car running properly, its a NECESSITY, get a bung welded on and hook that bitch up

 

ok you got it bro. Thanks appreciate it!!

 

bump

 

2K rmp? shounds like a vaccum leak, have you try to adjust the idle?

 

yeh not much of any help from that

 

Wow i think you need to do some research on how a Fuel injected vehicle works.

You probly have an aftermarket header, which is the reason you don't have a spot for an o2 sensor. Get a bung weld it up get an o2 sensor plug it in the harness screw it in the bung. Now go get a Factory Honda Service Manual and read it from cover to cover. You'll find all the anwsers in there.

Pull the 7.5a fuse from under the hood to erase codes from memory.

Also Find someone who knows crome and have him tune your ECU on a wideband o2 sensor, then you won't even need that o2 sensor. I get 30-35 mpg with my d15b w/ex tranny in a vx hatch

 

ok you got it. thanks

 

I fixed the idle, FITV valve was [freak]ed.
But I GET SUCH BAD GAS MILEAGE, is it this o2 code you think?