I've got a 1990 Rocky 1.6L petrol which I can't get started. It isn't getting fuel to the filter at the firewall. We put a new fuel pump on as the old one wasn't starting with the key in the "on" position. The new one (fuel pump) does come on with the key in the "on" position, but still no fuel. I put a tester on the fuel pump leads...it shows just under 12v in the "on" position and fluctuates some just below 11v in the "start" position. I also drained the tank just to see if there was fuel and there should have been plenty (5-6 gal). What am I missing?