Uncategorized fuel pump questions July 23, 2016 dstech how do you diagnose a weak fuel pump? i have an 07 rancher 420 fuel injection that starts and dies backfires and dies if you try to give it throttle, im assuming thats a fuel problem? how do you check the fuel pressure on these? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related