So for about a week, my E5 has been acting up... at 3000-4000rpm car boosts, but bogs down and stutters. This happens on WOT or 3/4 throttle. If you give it a little gas, its fine. I was trying to figure out the issue and driving around slowly, was about to head home when on 3rd gear hit boost on 1/4ish throttle when it suddenly did not make any boost and started running REALLY bad, i did get to drive the last 300m to home and let it idle for 2-3minutes. idle was jumping from almost dying to 800ish rpm. I let it idle for about 2-3 minutes.
There is no weird noises from the engine, no leaks, no warning lights. (i have no code reader so cant check that for now).

Sorry for my bad english, im from Finland and this is our way of speaking Rally English. ->
Im gonna head out to the garage and start checking for loose piping and big boost leaks.

 

 

Haha on that Vid. Thanks

Looks like you may have found the problem. Looks like the spark was blowing out the side of the plug. Let us know if a new plug corrects the issue

Welcome

 

Spark blew side of the blug, tested with my buddies coils and worked fine, ordered all new coils, plugs and wires. Next stop -> make last owners GReady electronic boost cauge work.