so my truck is getting like 5.5km/l city 7 on the highway
and the exhaust stinks of gas and exhaust gas is pretty hot.
The twist is, with one of those guaranteed to pass emission formula
like fuel system treatment, the mileage is increased quite a bit (at least according to my calculation) the effect runs out upon refueling. I tried higher octane, not sure if that helped. The check engine light is on, so i tried to replace the O2 sensor, as soon as the O2 sensor came out the exhaust temperature dropped significantly, like i could actually put my hand by the gas and be ok, however crappy tire gave me the wrong o2 sensor and it didn’t fit, i kind of got pissed because they were giving me attitude about it so i just got a refund and plugged the hole with a bolt. Now a couple days have passed, exhaust gas is hotter again, but not as hot.
I also did the self diagnostic with the blinking lights but it gave me really weird
code that didn’t make sense like 3 long 3 short, (well this one makes sense, 33) 3 long 5 short 3 short 3 short, 5 long… something like that.
The car also sometimes run above normal temperature but not boiling overheating,
could anyone help me out? this is my winter beater/work car and it’s pretty much draining my wallet right now. and i really wanna keep this truck
thanks a lot in advance