Erratic Throttle Issues

Sethmac · 07-13-2018, 07:40 PM

I just upgraded to an Alltrax XCT with an A4 motor.

I've noticed that the throttle is erratic when you push it to the floor. At top speeds, it will suddenly back off...when I watch the throttle % on the monitor, it will be at 90 and then suddenly jump down to 41% and then back up again...jump around the whole time.

What might this be...bad signal from throttle?

On a potentially unrelated note, whoever had the cart before me has some wired where the cart runs with or without a key whether its on/off.

Sethmac · 07-13-2018, 07:45 PM

From reading around...is this a bad MCOR?

NoleFan4Ever · 07-13-2018, 08:53 PM

That would definitely be the sign of a bad MCOR (potentiometer is faulty)

One way we try to test them is to cut the key off, pump the pedal to the floor ~30 times or so, and then try it again. Most times it will work correctly for a little while and if so, you have confirmed the problem.

NoleFan4Ever · 07-13-2018, 08:57 PM

And the XCT auto learns the throttle so you can always go into the tool kit and under the Controller Tab, click "Clear Auto-Cal" and then let it relearn it again.

WalterM6 · 07-13-2018, 09:47 PM

Quote:

wired where the cart runs with or without a key whether its on/off.

Sergio answered this not long ago. He says it's caused by having different common connections for your 12 dc system and the 48v dc system. I can't come up with any key search words to find his exact solution. You might start by temporarily disconnecting the power for the lights/12v system from the batteries and see if that solves the problem. I'll keep looking.

For your reading pleasure.

http://www.buggiesgonewild.com/elect...thout-key.html

Sethmac · 07-13-2018, 10:02 PM

Its a 2006 DS...is it just held to the frame with the screws and you just pull it off? Looks like I would need a conversion kit, correcT?

Sethmac · 07-13-2018, 10:05 PM

NolesFan...so my key doesn't turn the car off (the other problem). Should I do the same thing, but flip it to Tow?

NoleFan4Ever · 07-13-2018, 10:27 PM

You can as that will take the power to the controller out. You can also remove the pack Negative after going to Tow if there is any other wiring concerns present...
But I would get that fixed if it is a bad switch or what WM6 was referring too (I am not familiar with it).

Sethmac · 07-14-2018, 05:24 PM

I was able to fix the throttle issue following the instructions found here: http://www.buggiesgonewild.com/elect...-mcor-fix.html

07-13-2018, 07:40 PM	#1
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103	Erratic Throttle Issues I just upgraded to an Alltrax XCT with an A4 motor. I've noticed that the throttle is erratic when you push it to the floor. At top speeds, it will suddenly back off...when I watch the throttle % on the monitor, it will be at 90 and then suddenly jump down to 41% and then back up again...jump around the whole time. What might this be...bad signal from throttle? On a potentially unrelated note, whoever had the cart before me has some wired where the cart runs with or without a key whether its on/off.
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103

07-13-2018, 07:45 PM	#2
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103	Re: Erratic Throttle Issues From reading around...is this a bad MCOR?
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103

07-13-2018, 08:53 PM	#3
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: Erratic Throttle Issues That would definitely be the sign of a bad MCOR (potentiometer is faulty) One way we try to test them is to cut the key off, pump the pedal to the floor ~30 times or so, and then try it again. Most times it will work correctly for a little while and if so, you have confirmed the problem.

07-13-2018, 08:57 PM	#4
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: Erratic Throttle Issues And the XCT auto learns the throttle so you can always go into the tool kit and under the Controller Tab, click "Clear Auto-Cal" and then let it relearn it again.

07-13-2018, 10:02 PM	#6
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103	Re: Erratic Throttle Issues Its a 2006 DS...is it just held to the frame with the screws and you just pull it off? Looks like I would need a conversion kit, correcT?
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103

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07-13-2018, 10:05 PM	#7
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103	Re: Erratic Throttle Issues NolesFan...so my key doesn't turn the car off (the other problem). Should I do the same thing, but flip it to Tow?
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103

07-13-2018, 10:27 PM	#8
NoleFan4Ever MOD of all BS! Join Date: Sep 2011 Location: Florida Posts: 17,477	Re: Erratic Throttle Issues You can as that will take the power to the controller out. You can also remove the pack Negative after going to Tow if there is any other wiring concerns present... But I would get that fixed if it is a bad switch or what WM6 was referring too (I am not familiar with it).

07-14-2018, 05:24 PM	#9
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103	Re: Erratic Throttle Issues I was able to fix the throttle issue following the instructions found here: http://www.buggiesgonewild.com/elect...-mcor-fix.html
Sethmac Getting Wild Join Date: Jun 2018 Posts: 103

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