08 GEM losing full power while driving

1

2008 4seater
Advance 8 brush motor
Reprogrammed controller
3 year old gels

Car was running great since reprogramming about a yr ago and put in refurbished motor. Noticed some “sputtering” last week going from 2/3 speed to top. Stopped after I slowed down and reaccelerated

Problems increased in frequency to the point now where power is being cut at about about half speed. Occasionally get more power and acceleration acceleration seems normal to 1/3 speed then very intermittent between 1/3 and 2/3 speed. Something isn’t right. No codes.

Where to start?

2

Service motor DONT KEEP DRIVING!!!

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3

I agree with OH,
This sounds like your brushes are sticking or your comms are real dirty.
Do you hear some grumbling noises from the front of the car when it sputters?

If you continue to drive it this way you will damage your controller.

4

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5

hearing the loss of power followed sometimes by the return of full power. Last drive it didn’t sound hally and was stalling around 1/2 power.

Picked this this motor up from Mike about a yr ago.

6

Hmmm… It looks pretty good.
Lift up on those brush springs and verify that each brush easily slides in their holder.

Since it had a TBR sticker on it then we should look at connections.

7

At full throttle?
?..

8

@Inwo its stalling at different speeds whine accelerating. Speeds deep kind of random but it typically happens around 1/2 my top speed but it’s happened at higher speeds and slightly Lowe

9

So, yes, happens at full throttle.

10

Yes - all of these symptoms are happening at full throttle

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