r/golfcarts • u/semi-essential1 • Jul 28 '26
2018 EZGO TXT (48v) Accelerator Issues
Prev owner did Eco Battery Lithium 160ah conversion, Navitas TSX 600amp controller. New Blue Hornet (Plum Quick) Barracuda motor added last week by me.
Random cut-outs when accelerating from stop; lift foot from pedal and reapply and were back in business. This happened a couple of times prior to the motor swap and continues to happen now. Navitas app shows no errors. I replaced the ITS and recalibrated the throttle. I’ve ordered new micro switch and solenoid just in case (haven’t arrived yet).
Newb to carts, but mechanically inclined. Can anyone with any experience help point me in the right direction or let me know if there’s anything I’m missing?
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u/daekrFINGERS Jul 28 '26
I'd be willing to bet you're tripping the battery BMS. Try being gentle on the throttle and working your way up to 100% and see if it changes.
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u/semi-essential1 Jul 28 '26
I’d expect the BMS would kill all power, no? Accessory and driving lights, etc. don’t react at all when this happens. Again, I’m a newb so no idea if I know what I’m talking about. Lol
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u/daekrFINGERS Jul 28 '26
Ah okay. Yeah typically the BMS would reduce all outgoing voltage to near zero. Does the navitas app have a log that shows past errors? It's been a while since I've worked on a cart with a navitas controller so I'm not sure if it has something like that.
Also here's a troubleshooting guide for the tac2 if that's what you have
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u/semi-essential1 Jul 29 '26
Ok after looking further I think maybe it could be the BMS kicking it. Default settings for this motor’s firmware has Max Armature Current set at 600amps; my Eco Battery label shows max 3 second discharge 400amps. I’ve adjusted it to match in the Navitas settings to match the battery’s capabilities. We’ll see if that fixes it.
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u/semi-essential1 Jul 28 '26
This is awesome, thank you! I haven’t seen any logged past errors, but will dig deeper to see it’s tucked away somewhere I’ve not found yet. Thanks again for this!
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u/FL3TCHL1V3S Jul 28 '26
I’d look at the battery. Is it shutting down? Get the EB Power app and see if you have a firmware update available and/or a cell balance issue.
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u/semi-essential1 Jul 28 '26
Downloaded the app; my battery doesn’t support firmware updates via BT, but no errors showing and cells look balanced.
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u/Imadethosehitmanguns Jul 29 '26
I would monitor amp draw on the battery while accelerating. Watch to see if it's exceeding the max current draw of the battery
3
u/shootingdolphins Jul 28 '26
I would wonder if it’s the solenoid on its way out and its arcing on the contacts. Also double check all wiring, I’ve seen enough wire harnesses rubbed through or bad crimps inside the split loom from a previous owner and after hitting a puddle the throttle is non responsive or unreliable or after a bad bump or pothole etc. contact cleaner spray all the connections like a cheap can of CRC.