frozenrotors Posted July 19, 2011 Share Posted July 19, 2011 Does anyone know here the thread is located that covers the topic of a 'Idle mixture screw' which is located. This mystery screw is located on the driver's side bottom in the back of the throttle body. I ran across the tread once before but can't remember under what topic it was on. Thanks, KM Link to comment Share on other sites More sharing options...
MY1PATH Posted July 19, 2011 Share Posted July 19, 2011 clockwise leans the mixture. It does not control air into the intake. It controls how much air gets sucked past the MAF. Less air past the MAF (clockwise) tells the ecu that it is getting less air and thus it reduces fuel. IIRC This adjustment does not effect rpm ranges above 2800 because that's when the O2 takes over for fuel metering Link to comment Share on other sites More sharing options...
frozenrotors Posted July 20, 2011 Author Share Posted July 20, 2011 clockwise leans the mixture. It does not control air into the intake. It controls how much air gets sucked past the MAF. Less air past the MAF (clockwise) tells the ecu that it is getting less air and thus it reduces fuel. IIRC This adjustment does not effect rpm ranges above 2800 because that's when the O2 takes over for fuel metering Has anyone seen or experienced any benefits to adjusting this screw. Such as change in mileage or performance? I'm curious, because now that I've located and fixed 2 vacuum line leaks, I still get a bit of a rough-idle as it warms up. Coming down from fast idle, when it reaches about 12-1500 rpm's it starts to idle rough then as it continues to warm up and settles into full idle at 8-900 rpm it idles so smooth It's hard to notice it's running! Mileage hasn't been the best, but it's a significant improvement over where i was at 8 MPG. Thanks, Keith Link to comment Share on other sites More sharing options...
Alkorahil Posted July 28, 2011 Share Posted July 28, 2011 It should idle at 750 in neutral with AC off. Link to comment Share on other sites More sharing options...
frozenrotors Posted July 28, 2011 Author Share Posted July 28, 2011 Thanks. But isn't that for the idle speed? I am referring to a small screw, similar to what older single cylinder motorcycle carburetors had on them. It's located on the drivers side (left) as your facing forward in the drivers seat. At the bottom corner of the Throttle Body. Thanks, Link to comment Share on other sites More sharing options...
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