It started about three weeks ago as I was starting out from a light (5 speed) as I started to feel the clutch grab it started to miss pretty bad ( popping and no power) then it just picked right back up and drove normal. Then a few days later I'm driving and in 4th gear doing 45 I signal to change lanes and as I accelerate it starts to miss really bad (still in 4th, I counted 4 pops) let off the throttle pushed the clutch revved it to clear the load and it still did it so I dropped it in third and it took off finally. Now the other day I'm driving home from work it's missing when downshifting and it's got an occasional mis at idle ( not all the time) so I finally pulled the codes it spit 94 and 44 which is the smog pump system. But would this really cause this misfire? Any ideas on what it might be? Had a same issue? Any help is appreciated as this is my daily driver I need it running 100%