when im just cruise driving ie on the freeway etc, it feels like there is someone with a string tied to the back of my car and is jerking it every few seconds. its a real quick stutter but happens like every 3 seconds. any ideas on what it could be?

 

What fuel mngmnt?
Seems like fuel cut....

 

what is controlling them?

 

partial throttle tuning.

 

It's definately a partial throttle tuning issue. I even spent an additional 3 hours trying to get the idle straight at cruise. I've got one small spot left about 6K rpms, and I think I've solved it. It happens a lot with trying to control injectors that big..

 

using uberdata. so a partial throttle tuning issue. well right now i what we have it at is anything under 3500 rpm we left the fuel maps stock(base gsr). what should i change?