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Electric Yamaha Electric Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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11-06-2013, 05:56 PM | #1 |
Not Yet Wild
Join Date: Nov 2013
Posts: 4
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G19E Throttle Sensor
Hi All,
I have acquired a semi-functional G19. It functions well but has the seemingly common issue of a jerky start....no throttle response until pedal half depressed, and then takes off like a scared cat. Often, it also requires a few pumps of the pedal before it goes. I tested my throttle sensor and it functions normally except the resistance is from 0 to 8k, not the proper 0 to 5k. Could this cause the starting issues? What effect would this extra resistance have on the cart? My next steps will be to look at the speed sensor and figure out what it does. |
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11-06-2013, 07:23 PM | #2 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: G19E Throttle Sensor
You have a problem in the throttle wiring, throttle sensor, or connections (or faulty meter). In my experience, if anything, the throttle will be a little low (~4700 ohms at full throttle). Has the linkage from the pedal to the sensor been monkeyd with? I do believe that this throttle issue is the root of your problems.
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11-07-2013, 09:24 AM | #3 |
Not Yet Wild
Join Date: Nov 2013
Posts: 4
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Re: G19E Throttle Sensor
Thanks for the insight!
The only monkey business I've seen from the PO is a hotwired keyswitch lead and removed backup beeper. I've replaced the keyswitch. Everything looks pretty stock on the sensor, actuators, no damage on the wires or connector. Tested it w a second meter and numbers were the same, 175 to 8500. When the shaft is turned, I can feel is a slight jitteriness. I think I'll try and cut open the sensor and see if contact plates are dirty...that could maybe be elevating the resistance. New units are pretty pricey. |
11-07-2013, 11:00 PM | #4 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: G19E Throttle Sensor
I suppose you could make your own throttle sensor with a 0-5k potentiometer. Use at your own risk,, It is your throttle were talking about.
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11-16-2013, 05:44 PM | #5 |
Not Yet Wild
Join Date: Nov 2013
Posts: 4
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Re: G19E Throttle Sensor
Problem solved...I just temporarily wired in a 0-5k pot and ran it by hand. Consistent and smooth starts!
Now to find a proper replacement pot to replace my hand throttle. |
11-16-2013, 06:55 PM | #6 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: G19E Throttle Sensor
The replacment pot for a Curtis PB-6 ($50) could be made to work, but, none of the pots i have found have the keyed and threaded design style that the original yamaha sensor has. The original sensor is at or more than $100.
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