Omar,


The normal TNII carburettor can function on venturi suction alone (exhaust pressure is recommended).

...But since it came on an engine originally equipped with a high pressure fuel delivery system, maybe it is not a 'normal' TNII...

If you go through the check-list, you will find and overcome your problem.


In any case, with the Perry pump, you must never use exhaust pressure.
The tank's 'pressure' tube must remain vented to atmospheric pressure.