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BIG problem ....!

1857 Views 8 Replies 7 Participants Last post by  Kyota
I got a 2.7L 98 tacoma standard cab..... I had to recently change my o2 sensors. I turned the check engine light off and a couple of weeks later it came back on.. I got it diagnosed and it came back as "no problem found".... I got the light turned off and shortly afterwards it came back on.... still no problem found. I also noticed my gas is gettin sucked down! i calculated 14.6 mpg on my last 2 tanks. If it matters i run 32" all-terrains... Never had this problem before but i thought that maybe the low mpg and EC light might be related... I mean i knew my mpg would be low but never that low... any idea?
Also if that is normal does anyone have any ideas on tricks to increase my mpg....Every little bit counts
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In my previous truck, 90 33re, the front O2 sensor was not working to par and after I swapped it, the check engine light went off and I got 2mpg better.

What kind of O2 sensor did you get? I have read that universals can be shitty. Bosche are good (thats what I had) and obviously Toyotas, maybe some others...
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