Ryan.G Posted August 20, 2007 Share Posted August 20, 2007 Does anyone know if you can recalibrate these units as have only seen one unit that is even close to my innovate wideband or my Vems wideband at present. All others are just way out Mapped a car on saturday that had one fitted and was reading 13:1 on AEM and then on my innovate i was seeing 11.7:1 (aem was in downpipe and innovate was using exhaust clamp) I was so confused i used a brand new sensor and free air calibrated and got exactly the same figures as before on innovate and vems Another example supra i have mapped i see 11.5:1 on my innovate wideband and then their aem shows 10:1. And theres mores So is there anyway to recalibrate these gauges or are they just another flashing paper weight Link to comment Share on other sites More sharing options...
JamieP Posted August 20, 2007 Share Posted August 20, 2007 Dan had this with mine at one time on the dyno he was getting different readings between the two, he pushed a few buttons on the laptop and said "there fixxed":search: not much help i know:D Link to comment Share on other sites More sharing options...
Ryan.G Posted August 20, 2007 Author Share Posted August 20, 2007 Thanks J that helps as at least i know it can be done Well have searched the Aempower forum and no one knows of anything but be very interested to know not for my sake but others. Link to comment Share on other sites More sharing options...
Wez Posted August 20, 2007 Share Posted August 20, 2007 Not sure about the Guage type units but I know with the controller type you had to have good earth and batt feed, when used with the aem ECU there is a gain adjustment which you calibrate the unit to with the sensor unplugged. Link to comment Share on other sites More sharing options...
TLicense Posted August 20, 2007 Share Posted August 20, 2007 You can't calibrate the gauge type as it's done at the factory, and has a specific resistor fitted to give the correct output to the gauge. It's explained in the instructions. How many do you think you've seen incorrect? If it's a lot then this is quite a serious problem for AEM, and perhaps they should be informed.... Jamie, it sounds like you were suffering from the old ECU not seeing the same value as the gauge problem. Mines the same, it reads off by half a point. It can be corrected by changing the calibration. Link to comment Share on other sites More sharing options...
TLicense Posted August 20, 2007 Share Posted August 20, 2007 Just had a thought actualy.... have you set the dip switches correctly? If not then it will read incorrect, as it may be set for running on a different type of fuel than you're using. Link to comment Share on other sites More sharing options...
Ryan.G Posted August 20, 2007 Author Share Posted August 20, 2007 Well the only aem gauge i have ever seen be close to my innovate was yours tony and a friends of jamiep's. But the rest i have looked at havn't even been close. A big difference. I never fit these for people and never use them if already fitted for when im mapping a car as have no faith in them. The switch on the back are for configuring output type but never touch them as dont use the wideband for mapping Link to comment Share on other sites More sharing options...
Ian C Posted August 20, 2007 Share Posted August 20, 2007 Out of all the cars I've been involved with only two haven't had an AEM and they have all behaved themselves. I know Smarty had a sensor let go a while back, and I know they vary on how far into the rich region they can actually read. Some differences of 0.1 to 0.2 I'd understand but reading 13's instead of 11's seems a bit dubious. Was it just not a one off broken unit? -Ian Link to comment Share on other sites More sharing options...
TLicense Posted August 20, 2007 Share Posted August 20, 2007 Just had another thought. It could have been a serial display gauge rather than a gauge type wideband. The serial gauge will display outputs from the ECU. If the calibration in the ECU is to cock, then what is displayed on the gauge will be too. Link to comment Share on other sites More sharing options...
Ryan.G Posted August 20, 2007 Author Share Posted August 20, 2007 unfortunatly not ian have seen 2 now that have been way out in the past monthes as is pretty scary espically if there reading rich when its wrong and you lean it out. Do you use your own wideband for mapping ian or use a customers if in place? Link to comment Share on other sites More sharing options...
Wez Posted August 20, 2007 Share Posted August 20, 2007 Mine was spot on what the dyno was reporting but mine is non gauge unit hooked up via the ECU. Link to comment Share on other sites More sharing options...
Ryan.G Posted August 20, 2007 Author Share Posted August 20, 2007 Tony you know I won't touch an aem so deffo can't be serial type. Don't forget tony I have a nice linkg3 here with your name on it wink wink Link to comment Share on other sites More sharing options...
Ryan.G Posted August 20, 2007 Author Share Posted August 20, 2007 Thanks wez but its the Uego which I'm commenting on Link to comment Share on other sites More sharing options...
michel lane Posted August 20, 2007 Share Posted August 20, 2007 adjust the gain setting on the AFR option , set it to 2 it should do the trick , else take it in steps of 1.3 -1.6 -1.8 etc ... Link to comment Share on other sites More sharing options...
bondango Posted August 20, 2007 Share Posted August 20, 2007 Mapped a car on saturday that had one fitted and was reading 13:1 on AEM and then on my innovate i was seeing 11.7:1 (aem was in downpipe and innovate was using exhaust clamp) Ryan i use an Lm1+Aux box, our own supra uses a UEGO and it is spot on when comparing readings. Just a thought though, you take the reading from the tail pipe using Innovates Clamp? does that not naturally read leaner? and most tuners add to the value on the lm1? what if there was a slight exhaust leak, or air being drawn into the system? or depending on the angle of the exhaust turbulance around the tailpipe drawing air in??? just some ideas.. Even if an aftermarket Wideband Sensor is fitted, i fit a bung for the LM1 on the DP as i dont really trust the tailpipe method - but thats just me lol (and i know tuners have been doing it that way for years ) Link to comment Share on other sites More sharing options...
Muffleman Posted August 20, 2007 Share Posted August 20, 2007 Is it just the gauge reading incorrectly ? Or is the reading from sensor to ecu wrong too ? If it is just the gauge then as mentioned definitely check the earth. The sensors themselves are pretty accurate as it's just the Bosch LSU4. Link to comment Share on other sites More sharing options...
Ryan.G Posted August 20, 2007 Author Share Posted August 20, 2007 adjust the gain setting on the AFR option , set it to 2 it should do the trick , else take it in steps of 1.3 -1.6 -1.8 etc ... I take it that is when your using a aem ecu? Ryan i use an Lm1+Aux box, our own supra uses a UEGO and it is spot on when comparing readings. Just a thought though, you take the reading from the tail pipe using Innovates Clamp? does that not naturally read leaner? and most tuners add to the value on the lm1? what if there was a slight exhaust leak, or air being drawn into the system? or depending on the angle of the exhaust turbulance around the tailpipe drawing air in??? just some ideas.. Even if an aftermarket Wideband Sensor is fitted, i fit a bung for the LM1 on the DP as i dont really trust the tailpipe method - but thats just me lol (and i know tuners have been doing it that way for years ) Thanks for your input, the exhaust clamp i use is modified so it actually sits right up in the exhaust for maximum flow. It also works on a venturi effect and have yet to find it read wrong but im sure a big exhaust leak would effect it. The problem is tho the aem wideband on one instance was reading 13:1 and the my innovate was reading 11.7:1. So that puts out that theory as no way it can get richer back there from exhaust leak etc. I would prefer as you say to use the down pipe method but i just dont have time to jack a car up and weld in or fit the sensor when mapping around europe. Like i said have tested my exhaust clamp lots with downpipe method and readings are always spot on. Maybe i just lucky and have mapped car with dogdy sensors but just slighty concerned me seeing on 3 cars now in last couple of monthes Link to comment Share on other sites More sharing options...
bondango Posted August 20, 2007 Share Posted August 20, 2007 I Shoulda read your post right, thought you were getting leaner readings than the AEM Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 21, 2007 Share Posted August 21, 2007 Can't you use a calibration gas to check the units? I test my Motec PLM once a month using calibration gas, but it's always been spot on. Link to comment Share on other sites More sharing options...
Ryan.G Posted August 21, 2007 Author Share Posted August 21, 2007 Well chris i never use the aem's anyway for mapping so no point me checking them but was just a general post worrying for other using them. As you said i always calibrate mine every week but then its in use every day Link to comment Share on other sites More sharing options...
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