Originally posted by NiCkY7+Feb 9 2005, 00:59 --></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (NiCkY7 @ Feb 9 2005, 00:59 )</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-khguan@Feb 8 2005, 13:24
just connect it to ur PCV hose... well.. for injection cars.. i think dat de effect onli few days.. then later de ECU will retune it back to normal... so u feel like normal again..
dats wat i feel lar... duno correct or not...
hmmh... i think not...
cause fuel mixture is calculate from the air flow sensor... the air sensor is near TB there... and the MC is attach at PVC, how the sensor calculate about the MC extra air? ;)
:D [/b][/quote]
let's take the new wira on Siemens ECU for example..
This version of engine runs on MAP sensor, not MAF sensor. Therefore any leakage into the intake manifold will cause an increase in the manifold absolute pressure (MAP). Thus causing higher indling speed. After some time, the TB servo motor will restrict the idling air by mean of further closing the butterfly. That's why the MC effect is temporaly.
But this do not cancel out the functionality of the MC. During gear shift especially, the MC helps to slow-down the RPM drop, which will give you more ohmps on the next gear.. That's the only effect i can feel from my DIY MC, which has been removed from my car.
About the A/F ratio.. since the system is running on MAP, the MC shouldn't updset the A/F ratio IF THE AIR LEAKING-IN IS OF THE SAME TEMPERATURE as the main intake stream.
I hope i do help..