I'll try to make this as concise as I can: last summer I put a DC 4-2-1 one piece header on my B16A CRX and I've been running off one O2 ever since. As a newbie to Honda tuning, I didn't realize my PW0 ECU needed both O2 sensors. So, for several months I've had one O2 sensor in the bung on the collector and I have the other O2 wire just wrapped with electrical tape.


Others here suggested I get two O2 bungs welded on the primaries, but here's the problem with that- that B16 is so crammed in there that there's barely enough room for the header--it was no easy task to install it, so I don't have the patience to go through that again. I took my CRX to the muffler shop and the guy told me that to remove the header and weld the two bungs, it would be upwards of $200 Geez...many here have had their O2 bungs welded for as little as $10-20!!


I really have to do something about this ASAP because my tags expired and I have to pass emissions in order to renew it. Plus, my gas mileage is really suffering right now.


Please vote for the best option and tell me why.

Thanks for the help!!

 

put your stock manifold back

 

Hey man,
Sounds like you know what youre saying.. 11 months from now, i will be facing the same problem..
I hope your are around so that i may ask you a million and a half questions..
Thanx.

 

Wow.. That's a big help

Anyway, Take your header off and put on your stock one so that you can take the DC header to have the bungs welded in while it's out of the car.

You know how the O2's sit on the stock manifold, all tucked away next to the block?.... well, have the guy that welds the bungs on the side of the header that is facing the radiator or hood. Make sure that it is on an area of the header that won't allow the installed sensor to be touching or in the way of the hood or radiator.

This is what gives you an opportunity to exercise ingenuity and creativity.... Or at least it would have if I didn't come along

 

Can you do some inventive wiring and just attach the 2 sets of o2 wires together? Might be the easiest and cheapest solution...

I mean, you can't just attach the 2 together, but if you amp it down to half the power and then send it out to both it could work.

 

Yeah, tried that already and it ran really bad. Performance was even more sluggish and it idled all over the place. Still didn't pass emissions either. There's two O2 sensors because one needs to read one cylinder pair 1+4 and the other reads 2+3.

 

This is probably what I'll have to do. I was trying to avoid this because in order to get the DC in, we had to take the crossmember off and it was a real pain in the ****!

 

why not get an emulator?

 

What's an emulator?

 

Anyone?




[Modified by Hondanut, 6:32 PM 1/19/2003]