General exhaust discussion & questions
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By 92civicEGsedan
#333102 I got a 4-2-1 header a while back from eBay an it had two places for 02 sensor the first is when the header goes from 4-2 and the second is from 2-1. I read that the o2 sensor should be able to be hit with exhaust from all 4 cylinders is this really important that I should relocate the o2 sensor?
By JohnRM
#333104 You should be fine with just keeping the o2 sensor where it's at.
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By TrailerTrash
#333109
JohnRM wrote:You should be fine with just keeping the o2 sensor where it's at.


this. i have the same kind of header with the sensor in the bung closest to the head and its been just fine for 30000 miles
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By 92civicEGsedan
#333114 I've had it like this for about a year but would relocating it help mpg or anything
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By 92civicEGsedan
#333115 I also installed a sunpro air/fuel ratio gauge and it says I'm running so lean that it won't even register so I'm wondering if relocating it will help it work better or if my o2 sensor is fucked haha
By JohnRM
#333125
92civicEGsedan wrote:I also installed a sunpro air/fuel ratio gauge and it says I'm running so lean that it won't even register so I'm wondering if relocating it will help it work better or if my o2 sensor is fucked haha


Best way to check the o2 sensor is by using an ohm meter / multimeter. I don't remember what the numbers should be for it to be working properly but you can find it easily on google. For your o2 relocation, it still shouldn't matter.
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By TrailerTrash
#333242
92civicEGsedan wrote:I also installed a sunpro air/fuel ratio gauge and it says I'm running so lean that it won't even register so I'm wondering if relocating it will help it work better or if my o2 sensor is fucked haha


worthless gauge dont count on it to be accurate. get a wideband and compare the two
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By 92civicEGsedan
#333250
TrailerTrash wrote:
92civicEGsedan wrote:I also installed a sunpro air/fuel ratio gauge and it says I'm running so lean that it won't even register so I'm wondering if relocating it will help it work better or if my o2 sensor is fucked haha


worthless gauge dont count on it to be accurate. get a wideband and compare the two


Yeah yeah I know heard it before dont plan on it to be accurate just to sorta work and I don't have the money for a wideband. Or Anything for my car in that case.