[DML] Idle mixture screw
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[DML] Idle mixture screw

After a full tune up on vin 4258 I was still not passing emissions 
until I purchased a 3mm allen wrench and toned it down a little.  I 
was surprised that I had to turn the idle mixture screw 
counterclockwise between 1/4 and 1/2 turn to get it under the passing 
threshold.  My question is, what are the ramifications of having the 
screw set to where the CO reading is very low as opposed to just 
barely passing regulations?  Is there anything else important I should 
know just in case this would cause premature engine damage.  The car 
runs perfectly now as it did before (but no fuel stench when it's 
running in the garage.)

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