have a slight missfire between 35-40mph when the car is first start up. anyone have this issue? or can think of a cure

 

Did you just replace your sparkplugs?

Getting a misfire code? Specific cylinder or random on OBD?

 

no codes. no nothing really just a missfire at that speed. and only when its just started up, warm or cold doesnt matter. no codes. i havnt changed anything. i want to have some ideas before i into it. right now im thinking plugs and pvc to start

 

do you think it could actually be the "shudder" all the auto guys are talking about at ~40mph instead of an actual misfire?

 

before you do anything i would check with an OBD. sometimes there are *pending codes.

 

ok ill check the obd first, and it could be a shudder. hmm ill do a search and see how they describe it

 

yeap I am sure it is the shudder.

 

+1 on the shudder. i can't envision a misfire without a code getting thrown, plus a misfire is unlikely to only present itself at that RPM/speed, typically a bad plug or coilpack will stay bad and cause issues all the time.

i would recommend installing the black betty grounding kit, i have had no issues since i put it in. also, consider telling your dealer and having your transmission control re-flashed. i don't know if that has resolved it for anyone though.

 

ok got a link to the ground kit