David, Are you sure about this? You say, "A cold motor will hunt a little initially but quickly calm down as the cold start valve shuts off. " I understand that the cold start valve only operates WHILE the starter is engaged IF the thermo-time switch is cold. Are you implying that the cold start valve still flows fuel after the starter has disengaged? Walt Tampa, FL -----Original Message----- From: jtrealty@xxxx <jtrealty@xxxx> To: dmcnews@xxxxxxxxxxxxxxx <dmcnews@xxxxxxxxxxxxxxx> Date: Monday, June 04, 2001 3:57 PM Subject: [DML] Re: no rough idle >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. You have to remember that the engine operates like a wheel, >it keeps going around so if 1 cylinder's output is lower (or higher) >than the others whenever it's turn comes around it will fire a little >differently than the others causing the engine to speed up or slow >down then the idle system tries to correct it but it can't react fast >enough to cancel out the effects of 1 cylinder so it over or >undershoots resulting in "hunting". A properly tuned motor when warm >will hardly hunt at all. A cold motor will hunt a little initially but >quickly calm down as the cold start valve shuts off. To improve gas >mileage you might need a tune-up and or a mixture adjustment. 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) >David Teitelbaum >vin 10757 > >