Have not tried that but did add 3/4 turn to both A/F mixture screws today to go richer and treated the car bad. Could not get it to bog. Its good news but the weather conditions were very favorable, 60 Deg, no humidty, as opposed to the weather when it acts up, 95 Deg high humidity. So we shall see what she does on a day like that. Actually ran its best today, got it home, kept it running, popped the hood to see if the gauge was working. Pegged at 0. That simply defies all laws of physics.