Fuel pump is a piece of piss, done mine meself and my mates when he broke down in a petrol station! Oh, when you hear a slight whine from the rear at tickover, it'll be the pump, quite normal.
Air/fuel gauges arent that good tbh, only work proper on WOT. But also a piece of piss to fit, attach grey wire to the black one on the Lambda and other 2 to +/-. Hope this helps
Can you see him, hiding in my sig?