Jim---Check out the areas that Walt recommended. They are reasonable and
consistant with some of what you describe.
To further check on what might be causing one carb piston to lag behind
the other, do the following:
Be sure both choke cables have no influence on the idle, even when the
choke is pushed in.
Loosen the bolt that clamps the two carb linkages together. Adjust the
idle on both carbs independantly. The vacuum 'pull' on each should be
identical.
Now, when you tighten the previously loosened linkage clamp screw, both
air pistons should rise equally, as rpms go up. If they don't, it's
possible that the linkage is not operating the throttle plates equally,
due to play in the pin, set screw or whatever means used to assure each
carb throttle plate opens the same amount. If such is the case, you can
either correct the cause of play in this connection, or loosen the
previously mentioned linkage clamp screw, twist the linkage to allow for
the lost motion, then retighten the clamp.
Do this till both air pistons rise equally, as dictated by the throttle
linkage.
It's also possible that the carbs internals are not set up the same. At
this point, we do not know for sure which one is correct. Sometimes
reading the spark plugs gives us a clue.
I no longer use the stock linkage, so I may have left out a detail here.
That's why it is always good to have a copy of the Haynes manual handy
when carrying out such adjustments. Let me know how you make out here.
Dick T.
'73
|