2005 club car 48v limo, loss of acceleration

goodolboy1080

6 weeks ago i purchased a 2005 club car, 48v limo style golf cart. seller told me he installed 6 new batteries, new/rebuilt motor and new cables, all of which have proven true. now to the problem, the cart has ran fine for 6 weeks, now after about 100 yards, it falls dead. i have checked all batteries, cables, connections at motor and controller as well as cleaned them. it accelerates to full speed, but over the course of 100 yards loses acceleration until it stops. voltage is at 51.45v at this point. i can put the cart under a load and push the go pedal and voltage does not drop below 48v but eventually cart dies still showing good voltage. motor ohms out good, batteries check good, everything seems good. am i dealing with a controller, motor or on board computer issue? it has the curtis 1204 controller & 3.10 hp special duty motor. any ideas would be greatly appreciated.

BGW

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shadowman

i,m not 100% certain but it could be speed sensor going out..........................

goodolboy1080

there is no speed sensor in the motor on this cart, have checked for it. motor only has the 4 cables, no other connectors or plugs. i thought the same thing.

shadowman

now thats odd, no plug on front of motor? ..............................

goodolboy1080

no sir, just a1, a2, s1, s2 cables. i'm baffled. i build prototype electric forklifts, you'd think i could figure it out, lol. i have a new controller coming directly from my curtis rep, but was wanting to see if anyone else had had the same problem i'm having. i pulled the motor, and checked it, brushes are brand new, armeture looks good, no burnt smell. spent 2 hours with the elecrical engineer here at work tracing voltages and still no solution.............

Stevegrmich

. . . even if there were a speed sensor, it would not "kill" the cart when it malfunctions but cause the stock controller to go into a default "safe" speed of about 8mph . . .

. . . is that a stock motor? . . . both stock motors ( Shunt MODEL 5BC49JB2057A and ADC MODEL ET6-4001) for that year cart show a speed sensor . . .

goodolboy1080

it is a club car motor. i am not sure if it is the motor that came "stock" on this cart. i know the previous owner said he had replaced it. it appears to be rebuilt, not "new". i was told that the 3.10 hp special duty is what this cart takes, being it is a 6 seater limo. i looked all over the motor when i had it out, nowhere on this motor is a speed sensor, and nowhere on the frame or surrounding areas is there a harness to plug into said sensor. this cart takes off at full speed, but steadily slows until it will move no more.

goodolboy1080

after eliminating motor and controler as an issue, i found that the "MCOR" was bad. after replacing it, the cart is back to 100%. i opened the old one and found lots of corrosion inside. it is a non servicable part that cost me $189 from a club car dealer here in houston. 2 screws and 2 connectors, and i'm back to go, go, go!

BeerBuggy

I would like to see some pics of your cart. Ive been thinking about getting a limo cart my next time around.

Stevegrmich

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