I had a Walbro and a Link ECU, and I had nothing but problems.

It cut out at random times, and I'd have to turn the key off and then back on again to get it going. When it started playing up, it would be fine if I kept constant throttle, but as soon as I used different throttle openings, the pump would cut out a few seconds later.

I took out the Walbro and sold it to a Honda Civic owner who has never had a problem with it, and I fit a Bosch pump, and never had a problem with that either.