|Quote, originally posted by Jefnes3 »|
Its fairly simple, really.
There are several equipment tests that use SAI pump.
One of them is testing for the MAIN oxygen sensor.
When the pump is removed the ecu will be unable to perform the test and assumes the o2 sensor to be 'bad', thus ignores signals from the o2 sensor. ALL VW obd2 cars do this, back to mk3.
This is the logically safe condition.
You can see this by watching vag-com. Look at block 001 after you
have removed the pump/valve, you will see live lambda trim
~frozen at zero.
My opinion: its a bad idea to disable o2 control on the ME7 since it uses full time wideband control.
Can this be 'fixed' in software: sure, I can keep the o2 control loop
functional. (there are emission test consequences)
i really dont think you guys get what jeffnes is saying...... your basically removing somthing because of looks that is a great feature
full time wideband on factory management is a amazing feature
i cant wait till obd3 comes out for even more controll.....ask a big block marine engine guy about it he'll explain
more controll= better ability to make power and safer because you can see and controll more parameters of a motor......
yes removing this doesnt make you lose power but it does take away a great stock ecu feature.....its one of the reason obd2 is better then obd1 (more controll) remember we are working with pumps that controll explosions the better controll we have over the explosion the better engines run......
so do what you want....but ask a mechanical engineer what he thinks and i bet you'll get the same answer that jeff stated