please im seriously stumped i have a 2018 4010 mule it would start and run great for about a month then shut down and didnt want to start,then it would start and do the same..

now it cranks fine and does at times sound like a backfire ,poof... and blowby crankcase area, acts like tit wants to start im lost
plugs, coils, ecu ,,throttle body and sensors, it turns over fine