[samson1128]

Hello all, I’m truly stumped by this one. I have a FBO 2007 335i and I have a very strange intermittent misfire, so sometimes when I go to drive my car it runs perfectly fine, it will boost as it should and run pretty well apart from some small little cold start misfires but nothing crazy. But other times, whenever I go to drive the car it’s practically undriveable, once I get into ANY sort of positive boost the car will hesitate and misfire really badly on different cylinders every time being practically undeiveable past 60mph, any positive boost at all will cause the misfire to happen. I’ve done plugs (gapped correctly), coils, mosfet replacement, injectors (not index 12 but from what I believe to be good ones) brand new turbos, boost solenoid, valve cover gasket, all within the past 500miles. Truly stumped, I will say though I did take a log and on 30 percent ish throttle when the car will start misfiring bad when getting into boost my rail pressure was wayyyy down at about 750-1000psi when doing the log. On my other logs where the car works perfectly fine it’s at 1600-2200 each time, and my lpfp is reading 70psi+ aswell. Could this be a hpfp? Just confused me because it’s intermittent and has been happening for months now, or could this be a sensor? I looked at my afr aswell and bank 1 was at 30 and bank two was at 40 which is wayyyyy off so I’m just not quite sure what this is, any help is GREATLY appreciated