[335iNavyGuy]

So I noticed today when I'm cruising slowly either traffic jam or slow streets 10mph to 35 mpg I get a rrally weird studder.

It's jumpy and not smooth at all.

Any idea what I would search to diagnose this or any idea what could cause it? Under 30% or more throttls I get 0 hesitation and runs smooth as can be.

I still have some fuel mixture codes because I removed my o2 sensors. Could this be a big problem or a cause ? Would installing my dp fix possibly help

[Antetokounmpo]

Bad coils/spark plugs almost every time. Could be bad gas too but not as likely. Also, the JB4 is probably causing the issue, mine did it a few times before replacing the spark plugs but when I put it on map 0 it wasn't an issue. Search "shudder" and countless threads will come up.

[335iNavyGuy]

Originally Posted by bk335

Bad coils/spark plugs almost every time. Could be bad gas too but not as likely. Also, the JB4 is probably causing the issue, mine did it a few times before replacing the spark plugs but when I put it on map 0 it wasn't an issue. Search "shudder" and countless threads will come up.

I put it on map 0, no change, i also just replaced all spark plugs and coils and fuel injectors in the last week


Also it doesnt always do it, like sometimes i drive and its fine, but sometimes i drive and it does it all the time?

[Antetokounmpo]

Originally Posted by 335iNavyGuy

I put it on map 0, no change, i also just replaced all spark plugs and coils and fuel injectors in the last week


Also it doesnt always do it, like sometimes i drive and its fine, but sometimes i drive and it does it all the time?

HPFP or LPFP could be candidates too.