If it's really the culprit I do not recommend wd40 on electric connectors. You want CRC contact cleaner or similar instead. wd40 leaves behind some nasty stuff after it dries up.
So my gl is acting up, no fuel pressure, no spark. The problem was that the previous owner let the car sit in the rain and the window seal was cracked right above the fuse panel... Replaced the fuel pump relay, checked the fuses, bought a new fuel pump, new plugs, new plug wires. Can someone top by and check it out? It has to do with the connectors being corroded that go into the back of the fuse box, I think. I have cleaned them with wd40, still wont run. Engine turns over, everything else on the car works. Just no spark or fuel pressure:c
You definitly need new muffler bearings...
what engine and fuel system are you working with?
did you really need to replace the parts you did, or are you just guessing?
what actual troubleshooting have you done?
are you getting power to the fuel pump?
get on a2 resource, figure out what wiring system you have and then determine which corroded connectors may be affecting your dead systems.
or...get a test light and start checking wires.