Hi Guys - hoping for some help in diagnosing a 2008 TE450 that sat for a couple years. It was in good running order when put away, was always well maintained, and has low miles. Honestly not sure if I had Stabil in the tank tho and that eventually led me down a path of replacing much of the fuel delivery system. When i first went to fire it up over the summer the fuel pump sounded off and it wouldn't catch. I replaced the pump with a CA cycleworks unit and a new fuel filter (Duralast FF3330DL) and new submersible fuel line (Gates 27093) . It fired right up. But was cutting out under deceleration. I then sent the injector out for cleaning thinking it might be gummed up. And replaced the plastic fuel elbow with the zip-ty unit (GTE-FI HUSKY) for good order. Now it won't catch at all. Have good spark. After perhaps 30 seconds of cranking (hooked to a battery charger as batt is also dead), it starts to drip fuel out of the bottom of the exhaust. So clearly getting extremely flooded. Is there any kind of check valve i needed to transfer over from the fuel elbow? Seems to be getting way too much fuel. Not sure how to check if the fuel regulator is OK. But i don't think that's likely given it was working - only change was the elbow and the injector cleaning. I thought the pump might have gone bad again (perhaps a faulty unit) so just tried replacing that again (this time with a cheaper Japanese ebay version (Kemso)) - same result. Am honestly at a loss on how to diagnose. I know the old adage of fuel, air, spark. Perhaps a fuel pressure test would help (i don't have but could purchase i suppose)? I don't think it's an ECU (timing) issue since it did fire up a couple months ago. I may check valve clearance, but that was fine when put away, so seems unlikely. I've put so many hours into messing about with this - Thanks for the help!