ORIGINAL: yf222000

Hello.

I am wondering if any of the experts here have seen this problem. The engine was working fine for a long time.
Now, as the turbine spools up from a stand still, the fuel pump kick in and trying to prime the fuel system, but
the pump only turned over very little and then stop. Sometimes it would continue to run for a short while just
long enough for the glow driver circuit to switch on as the manual says. But this is very rare and even if the plug
lights up, the pump will stop which cause everything else stops. I have tested the pump with a AA battery.
The pump runs smoothly with that AA. Does anyone might have an idea why the engine is doing this? This is
an old air start (Auto Sequence) Simjet turbine, which has run so smoothly for a long while before this bug shows
up. I thank you all much for the inputs and help.