terribleturner Posted August 19, 2006 Share Posted August 19, 2006 ......I Think. The gauge when you turn on the car to the on position does it's little preset routine then goes straight to around 14.8. I then turn the car over and it usually bounces around 14.7 to 15.1. I add a little throttle an it still bounces around in the same bracket reading. I've taken the sensor out and given it a quick clean but it was brand new when it went in. Does this sound like there's something wrong with it to anyone?? Quote Link to comment Share on other sites More sharing options...
Homer Posted August 19, 2006 Share Posted August 19, 2006 Thats exactly how mine behaves. I thought it a little weird at first but several knowledgable people here told me this was perfectly normal. Quote Link to comment Share on other sites More sharing options...
Jake Posted August 19, 2006 Share Posted August 19, 2006 Mine does that too. Not that my car has a stock ECU controlling the fuelling - but I've had the AFR in the grey car in the past and that one was the also the same. AFR gauges make you paranoid. Quote Link to comment Share on other sites More sharing options...
JohnA Posted August 19, 2006 Share Posted August 19, 2006 .....I've taken the sensor out and given it a quick clean but it was brand new when it went in. Be very careful when using any liquids to clean the sensor. WD40 and the like can damage it. Quote Link to comment Share on other sites More sharing options...
Kevin Huntley Posted August 19, 2006 Share Posted August 19, 2006 When the sensors go the needle on the guage normally goes all the way to the right and never comes back despite rpm/speed. I have been through a few now but its normally due to my exotic choice of fuel. Kevin Quote Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 19, 2006 Share Posted August 19, 2006 ......I Think. The gauge when you turn on the car to the on position does it's little preset routine then goes straight to around 14.8. I then turn the car over and it usually bounces around 14.7 to 15.1. I add a little throttle an it still bounces around in the same bracket reading. I've taken the sensor out and given it a quick clean but it was brand new when it went in. Does this sound like there's something wrong with it to anyone?? Are you saying that the reading is 14.7 to 15.1 through cranking, or at idle, and from warm or cold? From Cold, at idle I'd expect a reading of around 11 or lower. When warm, it will fluctuate between roughly 14.4 to 15.5 as the stock ECU tries to keep it as close to 14.7 as possible. I'm not really sure what it would read whilst cranking due to the amount of current the starter motor pulls, this may 'upset' the guage. Theoretically, I'd expect it should be richer, (lower numbers), while the engine is cranking. Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 19, 2006 Author Share Posted August 19, 2006 Are you saying that the reading is 14.7 to 15.1 through cranking, or at idle, and from warm or cold? At idle from Hot AND cold. From Cold, at idle I'd expect a reading of around 11 or lower. When warm, it will fluctuate between roughly 14.4 to 15.5 as the stock ECU tries to keep it as close to 14.7 as possible. The gauge has never read lower than 14.7 ever. I used a little lemon juice to clean the sensor. Going to put a proper wideband on the car next week to double check the readings. Just was wondering if it's possible a wire had come loose or something. Quote Link to comment Share on other sites More sharing options...
absz Posted August 19, 2006 Share Posted August 19, 2006 mine when cold is 12.7-13.1 and 14.7-15.1 when hot Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 19, 2006 Author Share Posted August 19, 2006 Hhmmm, so do we think the gauge could be faulty and i should seek sending it back?? Quote Link to comment Share on other sites More sharing options...
Branners Posted August 19, 2006 Share Posted August 19, 2006 Mine is down in the 11s when its cold and comes back up to 14+ when hot and obviously goes all over the place when driving, particularly when on part throttle and coming off throttle. It will go off the scale with a --- as well. Who fitted the guage and sensor for you? JB Quote Link to comment Share on other sites More sharing options...
Wez Posted August 19, 2006 Share Posted August 19, 2006 You should be able to test the gauge calibration by turning the ign on with the sensor unplugged, what reading does it display. I have the non-gauge version and to calibrate the output signal you unplug the sensor, switch on the ign and it should read 4v on the 0-5v output, the gauge should also have the same 0-5v output for ECU hook up. Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 19, 2006 Author Share Posted August 19, 2006 Who fitted the guage and sensor for you? JB Me You should be able to test the gauge calibration by turning the ign on with the sensor unplugged, what reading does it display. I have the non-gauge version and to calibrate the output signal you unplug the sensor, switch on the ign and it should read 4v on the 0-5v output, the gauge should also have the same 0-5v output for ECU hook up. I'll have to have a play on Monday when i get back to the car. Cheers Wez. Quote Link to comment Share on other sites More sharing options...
JohnA Posted August 20, 2006 Share Posted August 20, 2006 ..Going to put a proper wideband on the car next week to double check the readings. ... proper wideband? Why, isn't the AEM proper? ...or are talking about an AFR display of the stock sensor signal? If that's the case then your readings are normal. Narrowaband sensors don't get beyond 13.5 and 15.5:1 even when new. Old ones hover around 14.5 and 15:1. Hence the term 'narrowband', lol... Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 20, 2006 Author Share Posted August 20, 2006 Sorry, i mean one i can stick down the exhaust. Innovation or something similar i think the make is. Just another one to give me a 2nd opinun. Quote Link to comment Share on other sites More sharing options...
JohnA Posted August 20, 2006 Share Posted August 20, 2006 Ah, so it is already a WB. Have you used leaded fuel at all? Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 20, 2006 Author Share Posted August 20, 2006 No, definatly not with the WB in, and before that over a year and a half ago. Quote Link to comment Share on other sites More sharing options...
JohnA Posted August 20, 2006 Share Posted August 20, 2006 Thor used to sell replacement sensors for £50odd quid IIRC, so it might be worth changing yours. Touch wood mine is still working A-OK, and God knows what sort of chemicals have been through it in the name of 'experimentation' lol... Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 20, 2006 Author Share Posted August 20, 2006 £50 isn't too bad i guess, i'll see if i can swop one over tomorrow. Hope it's just that. Cheers John Quote Link to comment Share on other sites More sharing options...
JamieP Posted August 20, 2006 Share Posted August 20, 2006 £50 isn't too bad i guess, i'll see if i can swop one over tomorrow. Hope it's just that. Cheers John you can try mine on tuesday;) Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 20, 2006 Author Share Posted August 20, 2006 That's very kind of you Jamie, may take you up on that Quote Link to comment Share on other sites More sharing options...
Kevin Huntley Posted August 21, 2006 Share Posted August 21, 2006 We keep a few in stock if needed, £54 from memory. Thanks Kevin Quote Link to comment Share on other sites More sharing options...
terribleturner Posted August 21, 2006 Author Share Posted August 21, 2006 Nearly all sorted now. Turns out it was just the gauge itself. Plugged another in and as predicted went all the way down to 10.0 (Unmapped car). Just need to send it back and get it replaced and job done Thanks again for all the advice. Quote Link to comment Share on other sites More sharing options...
JohnA Posted August 22, 2006 Share Posted August 22, 2006 Faulty controller eh? Quote Link to comment Share on other sites More sharing options...
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