# Hesitation on Acceleration, Noise under Hood
**URL:** https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513
**Category:** GEM Forum
**Created:** [October 9, 2014, 7:30am UTC](https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513 "2014-10-09T07:30:02Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@EOppegaard](https://community.electricforum.com/u/EOppegaard)
#### Post date: [October 9, 2014, 7:30am UTC](https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513/1 "2014-10-09T07:30:02Z")
Hey everyone!
We have a 2005 GEM e4 NEV that seems to be having some hiccups.
I was gone for a week, and then came back to drive the NEV and it had issues accelerating in forward and reverse.
It does go forward…and backwards…but jerks and hesitates. There is also a buzzing/grinding/not normal noise coming from under the hood.
Batteries say they have a full charge according to the display, however they are also original, so I am anticipating they need to be replaced.
It was left on the charger during the week I was away, and everything appeared normal.
Any tips for what could be going on or what to investigate? I am going to load test the batteries tonight to see if they are all shot.
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### Author:  [@GEMmechanic](https://community.electricforum.com/u/GEMmechanic)
#### Post date: [October 10, 2014, 4:13pm UTC](https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513/2 "2014-10-10T16:13:14Z")
Nine years is impressive for a set of batteries. We will need a more detailed description of the problem.
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### Author:  [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)
#### Post date: [October 13, 2014, 7:04pm UTC](https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513/3 "2014-10-13T19:04:41Z")
Electrical buzzing or mechanical. My 4 seater started bucking and lurching. Motor shorted and took out the controller also. If you smell any thing get your motor checked before it zonks the controller.
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### Author:  [@E-Frogs](https://community.electricforum.com/u/E-Frogs)
#### Post date: [October 23, 2014, 9:46am UTC](https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513/4 "2014-10-23T09:46:00Z")
Does the buzzing sound almost like something is shorting out under the hood? If it is what i think it is then the brushes have broken down or are to worn down at this point to make contact. Do you have the factory motor or an aftermarket one?
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### Author:  [@EOppegaard](https://community.electricforum.com/u/EOppegaard)
#### Post date: [October 30, 2014, 1:50pm UTC](https://community.electricforum.com/t/hesitation-on-acceleration-noise-under-hood/4513/5 "2014-10-30T13:50:59Z")
Thanks for all the help…I may have fixed it…or it resolved on its own.
We have an aftermarket motor (R4F) and reprogrammed controller. I took all the connections apart, cleaned them again, and tightened them down. Now all seems to be well.