I have a 2003 Jeep liberty with about 195,000 miles on it.
All of a sudden it’s misfiring pretty badly. I was able to park it for a few minutes the other day and drive home 40 miles normally, but the next day it didn’t seem driveable at all.
There’s a small evap leak code and a random misfire code. Also, misfire codes for cylinders 4 5 and 6, which would be different sides of the engine.
I’m not sure of the evap code could be related or not. I’m thinking that faulty fuel injectors / plugs / ignition coils sound unlikely because it’s multiple cylinders all of a sudden? Compression-related problems sounds more unlikely to me because it’s multiple cylinders on multiple banks.
My best idea is a failing fuel pump, although I don’t presently have a pressure gauge.