I have a jet boat with a chevy 454 big block and a holley double pumper 750cfm carb. The boat used to start but would load up with fuel and just bog. I rebuilt the carbs (first time rebuilding a holley) and some how managed to make things worse. I crank over the engine it pops right away then just continues cranking. I pull the plugs and they are soaked. I take plugs out and let them dry and install them again after a couple of seconds of cranking there soaked again. Is there a way to check fuel pressure on an engine that wont fire?