I installed a new o2 sensor in my H22 swaped Accord and Now it seems like I dont get as good gas mileage as before. The old sensor was from the f22 engine, Do you think a sensor with 190,000 miles would cause the ecu to run leaner and in-turn get better gas mileage? I want to say that I think I feel a little more midrange power but thats probably just in my mind because I changed something. What cha think?

 

You might have a bad o2 sensor. I suppose it can happen to new ones as well. Look into Denso. I just got a new one from oxyensensors.com

 

Try reseting the ECU and give it a tank or two to adjust to the new sensor. Might be a bad sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by s13_240sx_92 &raquo;</TD></TR><TR><TD CLASS="quote">Try reseting the ECU and give it a tank or two to adjust to the new sensor. Might be a bad sensor?</TD></TR></TABLE>

Don't be too alarmed. My o2 sensor went out a few months ago on my 5thgen, and i just reset the code a few times. After a while i just decided to change the sensor with an oem one. right when i chnaged it i got low 16mpg driving reallllllyyyy conservatively. But a tank or two after i got my o2 sensor switched i started to get high 19s with hitting vtec a few times. The tank im on right now seems to gettting better than 19. Looks to be maybe 22-23 mpg mainly city driving.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by asdfsad &raquo;</TD></TR><TR><TD CLASS="quote">The tank im on right now seems to gettting better than 19. Looks to be maybe 22-23 mpg mainly city driving.</TD></TR></TABLE>

dang i would be pissed if i got less than 25mpg on city driving! i get something like 30-32mpg with the original honda o2 sensor with about 140k on it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB6racer &raquo;</TD></TR><TR><TD CLASS="quote">

dang i would be pissed if i got less than 25mpg on city driving! i get something like 30-32mpg with the original honda o2 sensor with about 140k on it!</TD></TR></TABLE>

how conjested is your city? Mine is very conjested. lots of stop and go oh yea and my spark plugs needs to be replaced which i kinda dont wanna do lol.

 

i don't live downtown or anything, but i go through 7 stops within a 7 mile trip to work.

 

Thanks for the help guys

 

Haven't used one personally but there are a lot of horror stories on here about the Bosch O2 sensor. If you have the $, probably wouldn't hurt to spring for the OEM.

 

Yea im glad that i got an oem sensor. Im still getting better mpg with every fill. Just filled up today and im getting 23 mpg.