Steviekid Posted May 26, 2009 Share Posted May 26, 2009 Well that's my brakes finished so on to the idle... Over a year ago my car was doing this at warm idle (usually when the car had been restarted while still warm). I changed the idle air control valve which made no difference. When it was at the garage for it's mot (Feb 08) they ran a diagnostic and found the O2 sensor wasn't showing up so they replaced it with a new universal one. The car seemed absolutely fine for a couple of weeks but then it started again and progressively got worse until it began running poorly at low revs. There was also a smell of fuel when the windows were open. I barely used the car for the rest of the year due to various reasons so never got round to looking at it till now. I checked the voltage between OX1 and earth and didn't get a reading at all so I removed the sensor and it looked like this: I let it soak overnight and cleaned it up this morning. Now it's back in the idle seems to be fine but the voltage over OX1 to earth when warm is all over the place reading anything between 0.25 and 0.85 volts. Am I right in assuming the state of the sensor is more likely an effect of another problem rather than the cause? The car's literally only done around 500 miles with it in. If so what should I be looking at? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 26, 2009 Share Posted May 26, 2009 Lambda voltage of 0.25 and 0.85 volts.is about right, as the switch point is 0.45V,does it rhythmically go back and forth? I had a slightly bad idle, but managed to cure it by adjusting my wide bands simulated narrow band output. Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted May 26, 2009 Share Posted May 26, 2009 Those Universal ones are never going to last more than a month or so on a car.. i went through 2 on my prelude, untill i put a Honda one on and it was fine, and still is to this day How much are 02 sensor's from toyota? Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 26, 2009 Share Posted May 26, 2009 Those Universal ones are never going to last more than a month or so on a car.. i went through 2 on my prelude, untill i put a Honda one on and it was fine, and still is to this day How much are 02 sensor's from toyota? around £80 Quote Link to comment Share on other sites More sharing options...
Steviekid Posted May 26, 2009 Author Share Posted May 26, 2009 Lambda voltage of 0.25 and 0.85 volts.is about right, as the switch point is 0.45V,does it rhythmically go back and forth? I had a slightly bad idle, but managed to cure it by adjusting my wide bands simulated narrow band output. Yeah, it goes back and forth. I was under the impression is should be between 0.5 and 0.7V though? Quote Link to comment Share on other sites More sharing options...
Steviekid Posted May 26, 2009 Author Share Posted May 26, 2009 around £80 Times 2 and you're closer Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 26, 2009 Share Posted May 26, 2009 (edited) Yeah, it goes back and forth. I was under the impression is should be between 0.5 and 0.7V though? No as the switch point on all narrow band lambdas is 0.45V. Should be fine if it does it with a regular rhythm, as it switches. Nothing wrong with universal ones, as long as you buy the right type. Edited May 26, 2009 by Tricky-Ricky (see edit history) Quote Link to comment Share on other sites More sharing options...
trinitom Posted May 26, 2009 Share Posted May 26, 2009 Times 2 and you're closer ?? are you on N/A? or uk speck? I paid £83 from toyota for my J-spec TT! Quote Link to comment Share on other sites More sharing options...
matthewm1965 Posted May 26, 2009 Share Posted May 26, 2009 I have just bought a pair of Denso ones for the N/A from Rockauto. Worked out at £101 for the pair including postage. They only took 4 days to come all the way from America! I think that Denso are the original supplier to Toyota. Matt Quote Link to comment Share on other sites More sharing options...
Steviekid Posted May 27, 2009 Author Share Posted May 27, 2009 ?? are you on N/A? or uk speck? I paid £83 from toyota for my J-spec TT! J-spec TT. I've been quoted £152.56!! Quote Link to comment Share on other sites More sharing options...
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