Hi at all. I've a strange problem.
A days ago I change lambda sensor.Finally my baby goes without a unstable idle.
After a couple of days,I discovery a problem.
If I push the accelerator pedal,over 3500/4000rpm and push down the clutch,rpms stay high for some seconds,and turn back slowly.
Same on movement and on neutral.
I unmount and deep clean idle valve.But unfortunately no solution.
So,I try to tune the min bypassing idle valve,acting on throttle valve screw.All this to exclude a problem with throttle valve.
Infact, without a idle valve,my car haven't the problem described.
If I reconnect the idle valve reappear the problem.
I've also try to tune the precharge big black screw on the idle valve,but I can't find a set-up that allow a stable min and don't give the problem on high rpms.
I've check the idle by give a variable voltage,and it work.
I don't know what can I do
If can be useful,I can post a video of the problem