Got a 95 fuel injected 460 in our motorhome and it started sputtering so changed the fuel filter, plugs, wires egr valve distributor cap, vacuum solenoid, changed oil and even the trans fluid and filter. Still bogging down and won't do over 40mph. Even put seafoam in the tank. Fuel pump is also new, put in less than a year ago. I'm running out of ideas. Would the catalytic converter cause this? Do I cut it off and streight pipe it? Really in a pinch and stuck in Texas at a little RV park off the interstate.