Marcus GTE Posted February 2, 2011 Share Posted February 2, 2011 Hi, was having a discussion in gereral chat that has moved on to be a bit technical. I've got a Uk TT and I'm getting only 230 miles from a full tank. Others had said they are able to regularly get over 320. It has been suggested that the o2 sensor could be done and the engine is runing rich by default. Sound familliar? I read on an old thread that said you can test to see if it's working properly with a volt meter. I've not had a look to see if I can find where it even is as I didn't even think there was a problem until today. I'm I right in thinking there is a front and rear sensor? Anyone know what I'm on about, and if so any chance of some help/suggestions. A walkthrough would be really good cheers Quote Link to comment Share on other sites More sharing options...
Nic Posted February 2, 2011 Share Posted February 2, 2011 (edited) On a UK Spec there are 2 oxygen sensors, if you remove the turbo heat shield you will see the first one below the turbos, the second is mounted on the second catalytic convertor. These are the Toyota part numbers 89465-19605 Oxygen Sensor - Front - UK Spec 89465-19595 Oxygen Sensor - Rear - UK Spec Pic of an oxygen sensor. http://img509.imageshack.us/img509/6194/p1020548mf8.jpg Edited February 7, 2011 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted February 2, 2011 Author Share Posted February 2, 2011 Thanks nic, your some man. Is there a way to tell if they are needing replaced? would it be the the one near the turbos that is likely to cause a problem as it's the one that I presume senses air comming in? Might be expensive to replace if it's doing it's job and I can't tell I thought about what you said a few weeks ago regarding bigger wheels. I scrubbed the brake dust off the stock 17's and they look pretty good. More to the point, I like te performace they give at the moment. As you pointed out, bigger wheels may only be an upgrade in looks. Besides, a friend of mine wrecked an alloy off his dads jag as there are so many pot holes on the roads after the bad winter. I'll hold off untill the urge returns and the roads are better. Quote Link to comment Share on other sites More sharing options...
trinitom Posted February 2, 2011 Share Posted February 2, 2011 you can tray the lemon trick and see if you get more miles from a full tank. if that's the case you will need a new one/s shortly, it may be a bit expensive but they will pay for them self's in fuel saving. Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted February 2, 2011 Author Share Posted February 2, 2011 Are u saying I should slice open a Lemmon and ram the tip in overnight? Sounds like a prank but it's the 2nd time I've heard it lol i agree it would pay for it's self quite quickly, just not sure it's the reason I'm getting 230 miles and others are getting 340. Worth a try I suppose! Quote Link to comment Share on other sites More sharing options...
trinitom Posted February 2, 2011 Share Posted February 2, 2011 no joking about the lemon, lots of people have tried that with success! and for the price of a lemon works a try. Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted February 2, 2011 Author Share Posted February 2, 2011 I searched lemon and found loads of info on this issue! Lol Found out it's lemon juice (on it's own or with a mix of bicarbonate of soda) you soke them in. Also seen nic replying to pretty much the same question from 2010. U must have the patience of a saint! Lol- sorry, untill I searched lemon not a lot came up. Also people tend to say eBay sensors don't do a lot where as the Toyota parts make a noticeable difference. It's now done 90k miles, so prob wouldn't hurt to replace them. I think I was wrong about one sensor reading the air intake temp, am I right in thinking one is before the cat and one after on the Uk TT? Lemon juice test may tell me if it's time to change them as I understand it's a temp fix. Just hope Its straight forward to remove them- don't want to snap anything! :0 Quote Link to comment Share on other sites More sharing options...
trinitom Posted February 2, 2011 Share Posted February 2, 2011 it should be easy to remove them, some members on here did use ebay o2 sensors and i think they did fine, they may not last longer like the oem stuff. and uk tt have 2 sensors like you said. a good thing to have on the future it's a afr gauge. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted February 3, 2011 Share Posted February 3, 2011 Pretty sure that the second sensor is used to monitor cat condition, and work's on a slightly different (longer) frequency, i don't think it will actually have any effect on the closed loop lambda feedback, it just throws a CEL if the cat condition is deteriorating. Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted February 3, 2011 Author Share Posted February 3, 2011 Cool, I'll have a look next week when I can work on it indoors. Won't be filling up until after then anyway afr gauge?... I'll have a search Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted February 3, 2011 Author Share Posted February 3, 2011 Cool, I'll have a look next week when I can work on it indoors. Won't be filling up until after then anyway afr gauge?... I'll have a search Quote Link to comment Share on other sites More sharing options...
Nic Posted February 3, 2011 Share Posted February 3, 2011 Air/Fuel Ratio gauge, shows how rich/lean the mixture is. See recent thread HERE Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted February 3, 2011 Author Share Posted February 3, 2011 Air/Fuel Ratio gauge, shows how rich/lean the mixture is. See recent thread HERE Cool, ta Quote Link to comment Share on other sites More sharing options...
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