Need some serious help, I have a 2003 WRX Impreza, I keep blowing the SBF 5 Fuse we checked the fuel pump its fine, checked the ECU and Relay fine, they are looking into my wire harness now. Does anyone have any clue why I keep blowing the SBF 5 fuse.
I got a Cobb cat back exhaust, a HKS downpipe, other than that not other upgrades. Never messed with my ECU. One day after I was driving I parked my car in the garage a little later I came back out and the garage smelled like when first turn on a heater, I lifted the hood of my car and it felt really hot, I could not locate any smoke but it smelled a little funny. My car started just fine the next day drove to work wanted to start my car after work not working. I need some help or input what this could be. PLEASE

 

check next to the downpipe at the firewall. when i put my downpipe on the A/C drain outlet hose was touching and causing a weird smell and smoke. check that.

Which fuse is blowing. I don't know what SBF #5 is off the top of my head.

 

Slow BLow Fuse or something like that. It's in the box under the hood. I remember I blew mine but thats because I was messing with the ignition and didn't have the battery disconnected.

I'd look at the ignition.