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- Mercedes SLK 230 1998 eng 111.973 bosch me 2.1 - Emissions very high - Mike Howdle April 4, 2006, 6:58 pm
Posted by Mark Frankland on April 5, 2006, 9:27 am, in reply to "Re: Mercedes SLK 230 1998 eng 111.973 bosch me 2.1"
Yes that's with ignition on and no air flow (engine not running). It can be measured between pin 3 and 2 I think. Not sure if this applies to hot film MAF sensors but definately hot wire usually used on petrol engines. If the sensor is under performing it usually causes a lean mixture. So if the MAF sensor is to blame I think you'll be looking for a fault as opposed to poor performance of the sensor. HTH 
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