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smurfbus smurfbus is offline
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Join Date: Aug 2009
Location: Europe
Posts: 1,376
I can ask here about the VEMS calibration. It sounds strange that it could self calibrate?

Edit: It seems there is no software calibration on VEMS WB and it is just set at the factory calibration. This works fine when the sensor is new and in speck. If the sensor is getting out of speck the AFR is not accurate anymore.

I would try another Bosch LSU4 sensor to see if there is any difference. You need one spare anyway.

With these CIS systems it runs so rich at startup it's hard on the sensor. I would power the WB after the engine has warmed a bit. Do NOT power the WB and wait and then start the engine. Warm sensor and cold water/fuel to the sensor is very bad for the lifetime of the sensor!

Is the idle AFR 10.5 cold or hot? Cold is fine but if warm I suspect something is not 100% right (try another sensor).

Last edited by smurfbus; 05-16-2011 at 08:55 PM..
Old 05-16-2011, 08:43 PM
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