Re: Gas adjusting valve settings

Posted by John Icenhower on Oct. 26, 1998 at 14:17:55

In Reply to: Gas adjusting valve settings
posted by Paul Reasenberg on Oct. 26, 1998 at 12:58:42

: Hi All,

: My '30 Coupe idles best (when warm) with the gas adjusting valve at 1/4 turn open. To drive at speeds of 0-25 mph or so, I need to open the valve up to about 1/2 turn. For faster speeds (I haven't had the nerve to go above 40 mph yet) it runs best at about 1 turn open. Further open than 1 turn doesn't seem to make any difference. When I am about to start from a red light (where it idles at 1/4 turn open), I find it best to open the gas adjusting valve to 1/2 turn BEFORE stepping on the throttle (it complains, backfires, etc if I don't).

: Are these settings and procedures within the "normal" range for the gas adjusting valve?

: Thanks,
: Paul

Paul,
Just to let you know you aren't alone, my Zenith runs almost the same as yours. I'm sure there is some deficiency in the high speed circuit that causes this. Mine idles great at about 1/4 turn open without any rolling or loping. But you try to get on down the road with it at that adjustment it spits and sputters. I have to go to about 2 turns open to run at 40 and can easily go up to 50/55 if need be at that setting.
I haven't tried to fix this as I put up with the rolling and rough idle when driving rather than adjust the gas mixture at every stop. Been driving it this way for several thousand miles and it doesn't seem to hurt anything except it is bothersome at either touring speed or idle.
I'd be glad to know what you find out about your experience.
John


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