>The >mixture screw is a very sensitive adjustment so if a 1/2 turn isn't >making a difference you probably have a vacuum leak somewhere (which >might account for your bad gas mileage) How might one check for vacuum leaks? My problem is my idle does not hunt AT ALL even at start up. If I had a leak wouldn't that make my idle hunt? After driving the car 300 miles after I adjusted the co screw 1/2 turn lean, I did stall twice while I was at stop lights, but my idle was not affected at all. Could it be something like my cold start valve is on constantly? I don't know I'm just tossing out ideas and seeing what comes back. Thanks Joe Palatinus VIN 17167 6808 >Idle quality (hunting) is directly affected by vacuum leaks, a >breakdown of the secondary ignition system dirty or missfiring >injecters, and an out of balance cylinder ie: low compression, burnt >valve etc