When I accelerate at slow speeds with a wider throttle, the car intermittently shakes and hesitates, kind of like hiccuping. No engine light or codes thrown. Makes me shift gears at higher RPMs but now the problem after a week is getting worst, starting to shake/hesitate at first gear or maybe even idle. Doesn't usually shake at high speeds, but it's starting to on fourth gear.. Oh! Sometimes the car just shakes like hell when I floor it on 5th or 6th gear.
Not sure what it is, I'm guessing some kind of misfire? From looking around the forums it seems like it's either the coil packs, spark plugs, fuel injectors, or carbon intake buildup. Any ideas?
If it helps, I have downpipes with JB+.
Related threads:
- http://www.e90post.com/forums/showthread.php?t=443171
- http://forums.bimmerforums.com/forum....php?t=1718713
- http://www.bimmerfest.com/forums/sho...d.php?t=590791
- http://www.bimmerfest.com/forums/sho...d.php?t=590791
I doubt it's gonna be a cheap fix, seems like problem is becoming worst. Should I try to fix it with fuel injector cleaner / engine steroids?
Thanks in advanced!