Volcom86 Posted October 23, 2020 Report Share Posted October 23, 2020 I came across an issue that my AEM UEGO gauge is reading rich at 10.0AFR when under load on the dyno. Their Bosch Sensor reads 12.0 AFR at same load and RPM My questions is I just noticed my ECU settings are set up as a Zeitronix ZT 3 when my gauge is a AEM Uego... Would this possibly be an issue or have some side effects? Quote Link to comment Share on other sites More sharing options...
M1tch Posted October 23, 2020 Report Share Posted October 23, 2020 I have an AEM X Gauge LSU 4.9 in mine - have wired mine in as CAN rather than AN voltage - guessing that the Zeitronix ZT3 has the same calibration in terms of voltage vs Lambda as the sensor you are running. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 23, 2020 Report Share Posted October 23, 2020 What part number AEM do you have? There are at least 3 different AEM lambda calibrations - and none of them match the ZT3! Does the AEM have a gauge? Does the gauge read the same as the dyno? Quote Link to comment Share on other sites More sharing options...
Volcom86 Posted October 23, 2020 Author Report Share Posted October 23, 2020 @Adamw @Adamwyes it does have a gauge. I will see if I can get the part number/photo MFG: 30-4110 SKU: 146 Which seems to use the LSU 4.9 wideband sensor Unfortunately it does not match the dyno lambda. Mine shows way richer AFR Example mine reads under 10.0 AFR and on dyno wideband it is leaner at 11.4 at full pull just where it should be! It use to read closer to the tune AFR and over time it got richer and richer but the car still pulled fine and hard and did not break up under boost which I thought it was strange because if it was this rich it would break up under boost! Hence why I wanted to get it checked and put back on the dyno. They told me it could be the gauge or sensor or earth connection having issues. I was trying to trouble shoot the ECU map file just to see if there is anything that sticks out and noticed these settings were like that mind you the current tuner has not touch this setting and it was presented by another previous tuner. This is the gauge I have. I also believe the wideband sensor has been changed somewhere along the lines. Quote Link to comment Share on other sites More sharing options...
dx4picco Posted October 23, 2020 Report Share Posted October 23, 2020 If the value shown by the gauge itself is richer and not in line with the dyno, then it has nothing to do with earth connexion issue. If the gauge itself shows same as dyno lambda but the ECU lambda value doesn't, then it can be a connexion issue or a calibration issue like Adam stated Quote Link to comment Share on other sites More sharing options...
Volcom86 Posted October 23, 2020 Author Report Share Posted October 23, 2020 Thanks for the reply. The AEM gauge and Ecu read the same data in this case richer then the Dyno wideband... It's not a case that the AEM gauge is reading different then what the ECU is reading. Both the ECU and AEM gauge read the same Quote Link to comment Share on other sites More sharing options...
Confused Posted October 23, 2020 Report Share Posted October 23, 2020 If the ECU is showing what the AEM gauge is transmitting, either your AEM is correct (and configured correctly within the ECU), or the dyno is correct. To know which is correct, you'll need at least one extra sensor to compare to. Quote Link to comment Share on other sites More sharing options...
Volcom86 Posted October 24, 2020 Author Report Share Posted October 24, 2020 A new wideband sensor has fixed my issues Thanks for all the feedback. I appreciate it as always. Thanks, Quote Link to comment Share on other sites More sharing options...
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