Re: [DML] Re: no rough idle

["Walter" <Whalt@xxxx>]

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
>
>