knowley Posted November 26, 2007 Share Posted November 26, 2007 Hello, Could anybody having a MBE 967 Ecu and the connection loom to Easymap tell me what is the battery tension reading (in Easymap) compared to the actual battery terminals reading (measured with a voltmeter)? Thanks Link to comment Share on other sites More sharing options...
dannylt Posted November 26, 2007 Share Posted November 26, 2007 Surely the idea is that it's accurate, and any difference will be down to the individual sensor, i.e. different on each car. Link to comment Share on other sites More sharing options...
rj Posted November 26, 2007 Share Posted November 26, 2007 My Stack dash indicates quite similar to the readout in Easymap. There is no external sensor neither for the ECU nor for the dash. I reckon the only thing the voltage is used for in the ECU is to slightly alter the injection time as the injector will open faster when the voltage is higher. I have never seen problems on my own car with this, but the voltage is fairly constant. It made difference though when I changed from a Rover alternator to a Brise, and at that point the voltage did change with 0.2V. I monitor the Lambda quite frequently. /r Link to comment Share on other sites More sharing options...
dannylt Posted November 26, 2007 Share Posted November 26, 2007 What do you mean "external sensor"? They're both wired to the battery, and therefore the sensor is internal. The voltage drops quite a lot when cranking especially, but also if charging or not. Link to comment Share on other sites More sharing options...
rj Posted November 28, 2007 Share Posted November 28, 2007 I've never run my car whilst not charging - or at least not been hooning it as there has been a warning light on! Of course there's a significant difference in the voltage whilst cranking, but this already is a different map, so nobody would be able to tell if the difference in fueling came from the cranking map or from the supply voltage correction. I just wanted to point out that the voltage sensors - and regulators - are internal in the units, and that it therefore couldn't be a dodgy sensor, hence the comment about internal sensors- Link to comment Share on other sites More sharing options...
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