Hoping you all can help. I am new to brushelss motors and esc's. I am just getting back to racing and when I left it was all brushed motors with the Novak brushless systems just srating to show up in mod racing.

Here's the details. I have a new Speed Passion motor, a 17.5...the new 3.0 with the plug in wire terminals. It's been run about a alf dozen runs...3 practice, two qualifiers and a main. Motor was never run for more than 6 minutes in a run, and never temped over 140 drgrees. I tried to race tonite, but when I put the car down for practice, when I took off it sounded like I stripped a spur. Picked up the car and checked the spur and it was fine. I blipped the throttle while holding the car and everything sonded fine. Put it down again, and again the grinding noise. This time when I picked it up and verified that again the spur was fine, I tried the throttle again and nothing...motor would not turn. Back to the bench and I see that if I rotate the wheels a little, everything works again. A few blips of the throttle and it's fine...then stops again. Spin the wheels a little and it goes again for a few tries, then stops. I pulled the motor out of the car and tried to run the motor only. Same thing, runs fine for a few blips of throttle, then just stops working...spin the motor shaft and we run again. I did notice that when the motor would stop running, it stopped in the same spot..in about the same 90 or so degrees.

Trouble shooting, I tried a different battery pack and a new sensor wire. Problem still exists. I also reprogrammed the esc twice.

I am running a brand new Novak GTB 2.4ghz version. The battery is a Reedy 5000mah 2S 35C lipo. Chassis is an Ofna JL-10e. FDR was run from 4.0 to about 3.9. Motor temp never over 140 degrees.

I realize this may also be an esc issue, but I'll start here. I see that SP sells just the internal sensor ring/plate for the 3.0 motor...might I have a bad sensor as the motor always stops in the same spot
Any help would be greatly appreciated.

Thanks!...and HELP!!!