F0rdGuy1994

Okay so I have a 1994 f-150 5.0 v8 xlt 4x4 with the 302 efi with 31's I have been having problems with lack of power and a weird sound when I accelerate and the truck bucks like a bull if I gas to hard, I have replaced the air filter with a k&n, fuel filter, spark plugs and wires added a fuel injector cleaner into the gas tank. My next thought would to replace the exhaust with a new cat and muffler to allow less build up since the stock one is so restrictive. Oh and when I took out the spark plugs the ground electrode was white as if not enough fuel and to much combustion at this point I am lost at what to do oh and I live in CA