O2 Sensor Eliminator questions???

Hi all

I have just purchased myself a lovely 2002 VTEC VFR. A previous owner has removed both O2 sensors (which i have) and fitted O2 eliminators. I don't have a flat spot which other people have reported with the sensors in but the fuel consumption seems quite high. I went through half a tank doing 80 miles and i wasn't hard riding. Does this sounds reasonable? for a 22ltr tank i thought it high...

Also i would like to know if anyone knows of any other side effects of removing the sensors?

Cheers

 

If you don't have O2 sensors how will the computer get the right mixture????
I would put things back to stock.
The previous owner may have taken those out for aftermarket exhausts.
If so maybe you could weld in some threaded inserts in the same stock position and have the best of both worlds ,
the right mixture and aftermarket exhausts.
Usually after market mufflers have less restriction and the mixture will be off. Uses more gas too.
If the intake AND exhaust are modified then you will need to rejet.
Personally I would just get it all back to stock and have good mileage ,the right mixture etc,.,
that is unless you have $300 to put it on a dyno and get it all tweaked to the right jetting for those aftermarket mufflers.

 

02 wouldn't have Jets...would it? do you have a power commander? I would say just have the sensors put back in... do the weld thing on the after market exhaust.......or buy a power commander

 

the stock setup is a mess. Go ahead and change it back to stock, but you won't end up with what you are looking for. The stock 6g efi mapping is a clusterfuck. I suggest you visit VFRD for technical assistance.

 

okay, I have a question here. *IF* you do the O2 bypass, wouldn't that create a abnormally rich condition and in turn wouldn't that be hard on the cat converter over time? I guess it would all depend on "how rich" it was, but excessively rich conditions cause a cat to plug over time because of the excessive heat it causes. Just a thought here.

 

+1
the o2 sensors will save you a little gas during constant throttle cruising, but you must remember that these bikes do use the o2 sensors in the same way as cars do. they are only used during light/constant throttle cruising. most of the time (rolling on and off the throttle, running through the gears etc) the bike relies strictly on the factory map (which is a clusterfuck) and the ecu receives no information from the o2 sensors.

also worth noting if you have any experience tuning a vtec vfr with a pc, you notice that yes you do richen up the fuel mixture in some spots, but in almost as many "cells" the factory map is excessively rich and actually needs to be leaned out.

moral of the story:
leave the o2 eliminators installed
get yourself a pc3
have a proper custom tune made for your bike
the factory map is a clusterfuck

 

My bike has carbs.
I cannot leave the O2 sensor in all the time because the head pipe is 1-3/8 inch and the sensor blocks about 1/3 of the exhaust flow.
My O2 sensor is only for testing purposes to find out if the mixture is too lean or too rich.

NO computer at all.

 

my post was in regards to the original topic.