Originally Posted by
Truckracer
I think general opinion has come around to thinking there is really no good reason for removing or disconnecting the spring, and many good reasons for leaving it as delivered. People use to say it overworked the throttle servo but tests by several people have proven the servo load and extra current draw are minimal. I have a spreadsheet I did a while back that I'll try to repost here in the next day.
Just to add to the point, leaving the spring on can help if your servo is less then accurate at centering and many have reported that it lessens wear on the throttle shaft and butterfly. I just started leaving them connected and going back to my older engines and re connecting them