I looked at doing this and using a 5 second relay: ignition on, 5 seconds of priming, pump off, start engine, ignition off, ignition on, 5 seconds of priming, pump off, start engine...but the relays are 40 dollars each. Tim

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!