very bad gas mileage and now strong smell of gas
hi everyone, first time post here. I've done some research on this but can't seem to pinpoint a problem with confidence so I'm looking for some Input from those a little more experienced than me. for the last 5 months now I've been getting 24 mpg however within the past couple of weeks it's dropped marginally over time down to just over 21mpg, a huge difference from the 34 i was getting ever since I've owned the car (7yrs). i drive 110 all highway miles daily commutimg to work so its really begining to add up and just this week I've noticed a stronger smell of gas.
i have a CEL giving the code clean fuel Injector system that popped up about 2 months ago. when i got the code i poured 2 full cans of seafoam in the gas tank and sprayed a full bottle into the throttle body while revving etc. it didn't seem to help and didn't clear the code. a month ago i found a same year parts car and pulled the 4 Injectors out and swapped them. I cleaned down where the injectors go and noticed they had been hot as a few looked slightly melted? the injector swap did nothing either. when I did the 1st automatic transmission swap 6 weeks ago i replaced the crankshaft position sensor (randomly gabe that code after install). I also couldn't figure out why it wouldn't crank after everything was back together and it turns out I had blown the 15amp injector fuse (dont know how). lastly maybe 6 months ago, jusssst before this issue started I replaced the accessory belt and tensioner, alternator, spark plugs and air filter
anyways at this point I'm at a loss as to what to do next to try and fix this mpg issue. cIogged cat converter maybe? Idk i tried to give as much info as I could hopefully it wasn't confusing. any and all help would be greatly appreciated! thanks