# New owner - 2007 e4 - surge at constant speed

**URL:** https://community.electricforum.com/t/new-owner-2007-e4-surge-at-constant-speed/12241
**Category:** GEM Forum
**Created:** [April 3, 2017, 8:20pm UTC](https://community.electricforum.com/t/new-owner-2007-e4-surge-at-constant-speed/12241 "2017-04-03T20:20:56Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![vwd50](https://avatars.discourse-cdn.com/v4/letter/v/ba8739/32.png) [@vwd50](https://community.electricforum.com/u/vwd50)
#### Post date: [April 3, 2017, 8:20pm UTC](https://community.electricforum.com/t/new-owner-2007-e4-surge-at-constant-speed/12241/1 "2017-04-03T20:20:56Z")

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Car has ride 4 fun motor and new gel batteries. Gearbox seems to be a little noisy and regenerative braking causes a high pinched squeal, but the most significant issue is a rhythmic surge when holding a constant speed. Cannot feel a surge during acceleration. Any guesses as to where to look first. Accelerator switch?, controller?, bearings? Constant velocity joints? Any help would be greatly appreciated.