2003 Club Car DS Bucks and Surges at First GO
 

I have a 2003 club Car DS (48V, IQ) which was driven to a point of totally discharging the batteries (I was not driving!). Batteries were recharged and the cart drove a few feet (with lots of power) and then just stopped. I could not get the cart to move again so I did lots of various tests recommended on this forum and decided to change the solenoid. Cart now runs great with exception to a new issue - it bucks and surges when you first depress the pedal. After the initial bucking (which lasts a couple of seconds), the cart runs normal and you don't experience any more bucking while doing the normal starting and stopping of on-road driving. However, once you stop for any prolong period of time (more than a few seconds), the bucking starts again when you first depress the pedal and then goes away as before.

When I changed the solenoid, I broke the wire of the old resistor which was attached between both posts of the solenoid. I replaced the resistor with a new one from the same vendor as the solenoid. Could the resistor be the problem? What is the role of of this resistor? Does it pre-charge the solenoid? How can I test it? What else could be causing the bucking/surging?

I also changed the entire battery pack as they were 4 years old and damaged by the severe discharge.

Thanks in advance for any ideas....

Re: 2003 Club Car DS Bucks and Surges at First GO
 

Still looking for any advice....

Re: 2003 Club Car DS Bucks and Surges at First GO
 

I had the same problem for the last week on my 2002 ds IQ. Today checked the two plugs on the MCOR cleaned the connections one has 2 wires the other 3 wires. Works perfect again.

Re: 2003 Club Car DS Bucks and Surges at First GO
 

I visually checked the Mcor without seeing anything obvious. Looks liked the only test I can do on it requires electrical testing. Going to give it an attempt. Thanks for your response - at least it gives me some idea where to start.

Re: 2003 Club Car DS Bucks and Surges at First GO
 

Might try pulling the plug harness off and blasting with some air to clean and dry it out, has worked for others.

Re: 2003 Club Car DS Bucks and Surges at First GO
 

. . . sometimes a little WD40 on connections helps . . :thumbup:

Re: 2003 Club Car DS Bucks and Surges at First GO
 

I finally found it - one of the negative connectors pulled loose from the grounding bar. Once I re-connected it surge went away.