Hey everyone, so after months of painful diagnostics I still haven't been able to source the misfiring problem on my VZ, after pretty much rebuilding the top half of the motor there's only a few plausible causes left and I was wondering if this would be one of them? Also curious that the last tank it had was E10, could that cause a bank to misfire? The EVAP purge solenoid used to tick consistently, like all of the time, it no longer does and I'm just wondering could this be causing the fuel/air ratio to throw off and cause the misfire? Going to run a cheap hose over from the solenoid to the throttle body tomorrow just to eliminate the actual hose but was wondering if the solenoid could be causing problems with real shaky, rough idle and spark knocks on start up and idle? It's been months I just wanna be able to drive my car again and unfortunately I don't make nearly enough to get it continuously diagnosed at the mechanics, and everything they've suggested so far has been the standard sparks, coils, timing chains, clean this clean that, sensors which are all brand new with the exception of the timing chains (the problem literally started out of nowhere like no rattle beforehand so I highly doubt that that would be the issue).