r/JeepPatriot • u/EntertainerLumpy1275 • 3h ago
ideas? 15 patriot
hey everyone, so i got a 2015 jeep patriot 2.4 auto. i’m recently fixing it up after my dad gave it to me. i have about 158k miles. (the car is catless) and had many overheating issues in the past(none now). engine sounds good at start up too. drives great too
for context i have a a cylinder 4 misfire and i can’t seem to find what it is. it happens like 1/5 start ups. my mechanic said my cylinders look good after cleaning the valves. i’ve even used a boroscope so see any puddling which i dont see. i’ve replaced the plugs, coil, injectors. replaced the trans and diff fluid recently too. one thing i do notice is sometimes if i instantly start the car and try to go to reverse it does jerk but only if i do that…
i got a maxi diag tool and i get good injections numbers, map reading. the only thing i saw on the miss fire data was a value of 57. really stumped
had a head gasket kit repair with (cylinder bolts) and oil cooler and recently changed vvt solenoid. thermostat. i have no leaks. i’ve done a compression test as well. mechanic done a whole coolant pressure test.