well i am the proud new papa of a 90 E150 van with 302efi and aod trans i would like to check timing and would like help with specs and procedure dont you have to short a terminal out somewhere? also what kind of fuel milelage should i expect driving it like an old lady thanks

 

There is a spout connector around the distributor. It is a little plug that connects 2 wires together. The timing should be set to 10 degrees BTDC. Mileage will vary due to the state of tune, weight in vehicle, tires on vehicle and air in the tires. Average should be 10-12 and 15-18