I'm stumped. Before tearing into them, thought maybe some ApexSpeed Weber guru can help.
Dual DCOE 40 Weber set (on a 1600 for pushrod). When cold or even warming up in the pits before going out, idle is "normal, i.e. can be adjusted fine for 600-800 or so rpm. Even as it gets up to temp (before going out) idle is fine.
But after coming in after a race session idle way too high, maybe 2000+. We just shut of off rather than readjusting. Then after it sits waiting for next session (probably 90 minutes or so), idle will return to "normal" even if pre-warming it up before going out.
Quick inspection doesn't seem to be a return spring(s) problem That is, the linkage and springs return solidly to the idle screw.
I'd sure think it was linkage related but at this point it doesn't seem to be the case and wondering if anyone has seen something similar caused by something other than linkage.