I've been playing with the settings on my vaporiser (including the
'response' screw on the front) - bin swapping engines so i had to!

Its currently running and idling but likes to try to stall when you
suddenly let off the throttle (like when you change gear)

Does this mean i have the screw on the front of the vaporiser too far
out or too far in? Is the diaphram now too loose or too tight?
I have an air fuel gauge in the car and the fueling is pretty much
spot on all the time, just wondering which way i should try to turn it
next.

On Oct 5, 9:34 am, Tom Woods  wrote:
> I've been playing with the settings on my vaporiser (including the
> 'response' screw on the front) - bin swapping engines so i had to!
>
> Its currently running and idling but likes to try to stall when you
> suddenly let off the throttle (like when you change gear)
>
> Does this mean i have the screw on the front of the vaporiser too far
> out or too far in? Is the diaphram now too loose or too tight?
> I have an air fuel gauge in the car and the fueling is pretty much
> spot on all the time, just wondering which way i should try to turn it
> next.

If the fuel mixture is always perfect, i'd think that the diaphragm
tension is fine.  If the vapouriser has an idle bleed screw you could
bring that out a little, so the fuel is never really "cut". Check out
this description, it works perfectly for me
http://someusefuljunk.atspace.com/TuneLPG/Tune_LPG.html

Good luck!
Josh