Broken bike, motor acting weird

[theyerb]

The other day, my bike started acting crazy. I was on a ride and the motor went up to max speed with no throttle response. I had to reach into my pack and frantically yank apart some connections to slow the thing down. I've reseated all the connections, and now, it's behaving unlike anything I've experienced before: pressing the throttle will do nothing about 95% of the time (5% of the time, it seems to work fine), but there is major resistance in the motor. If I forcefully push the bike forward, the motor will have resistance but click through various stages of resistance (I'm guessing this has something to do with the Hall sensors... but I'm not knowledgeable in their operation). I figured I'd ask the experts before buying a new controller and throttle. Any input is appreciated

My setup:

48v 15ah Ping Battery
9 Continents gearless/direct drive motor
36-48v ebikeman ebay controller

 

[DAND214]

Did you get caught in a rain storm?
Sometimes the throttle if it has a battery level setup, the water can cause it to send full throttle to the controller.

Which wires did you pull apart when you paniced?

It sounds like you have a shorted phase wire or mismatched.

Recheck the wiring for the halls and the phase if you pulled them apart. if they got wet dry them out and try again.

You might just have a bad throttle. I had a half twist go flaky. The magnet had come out of place and stopped working then if I bumped it around it would go faster and faster or just stop.
So check the throttle too.

Dan

 

[Icewrench]

Disconnect the phase wires and separate the ends so they don`t touch each other and then roll the bike. If it now rolls normal with out resistance then the controller has some bad fets.

 

[dnmun]

throttle voltage could be pinned to the 5V supply. or the magnet in the throttle is loose?

 

[theyerb]

When the throttle went crazy, I pulled the main battery wires. When the battery in unplugged, the bike rolls without resistance. The comment on bad fets sounds like a good bet. I've had a few controllers go bad from burnt fets before. I'll take a look.

 

[dogman dan]

Bet the blown controller guess is correct. Or some kind of short on the phase wires if the motor doesn't roll smooth when unplugged. Sometimes the shorted phase wires are why the controller blew. Any cuts or nicks in the wire at the axle?