Another thing that can trigger traction-control is having differently-sized tires between front and back. I replaced 2 tires (due to puncture) on our 2012 and even though they were the same specs, the difference in diameter between the new and worn tires was enough to cause the car to hunker down, especially around turns. Dealt with it temporarily by swapping front/rear. I forget which tires ended up where.cwerdna wrote:It's possible it's normal and that it's traction control and/or stability control cutting power when it detects wheel slippage. What tires are you running? Are the front tires nearly worn?
You say "rapid acceleration" and "full normal acceleration" and "eastern Canada with temperatures near freezing." Also, you mention Eco. The responsive of the go pedal is really sluggish feeling for much of the travel in Eco (I almost never use it) and then perhaps you're making a sudden sharp increase when floor it or nearly floor it.
If it happens only on wet road or road that's snowy or slushy under hard acceleration, that's probably your problem. Do you have other FWD cars w/non-snow tires and with traction control or stability control?
Remember that on FWD cars, when you accelerate, the car squats and weight is transferred to the rear wheels, which provide no propulsion. And, weight is coming off the driven front wheels so there's less downforce on the fronts and more potential to lose traction and have the front wheels break loose.
I ran tires that had a larger diameter than stock for a while (235/50R17). What I found was that the size of the rears didn't matter. But having front tires with a larger diameter than stock really confused the traction control system. For the most part, there was no issue. But for whatever reason, taking a sweeping bend at around 40 mph would cause the traction control to kick in like crazy. I'd lose all forward momentum and slow down as the traction control kept pumping the brakes. It was very disconcerting.Nubo wrote:Another thing that can trigger traction-control is having differently-sized tires between front and back. I replaced 2 tires (due to puncture) on our 2012 and even though they were the same specs, the difference in diameter between the new and worn tires was enough to cause the car to hunker down, especially around turns. Dealt with it temporarily by swapping front/rear. I forget which tires ended up where.
The problem and link you referenced are from my posting a few years ago. Unfortunately I no longer have the car or the service paperwork describing the repair. The skinny on the malfunction is the power control system thinks the brakes are applied, thus blocking acceleration. I do remember it involved replacing an insanely expensive brake system module and some software updates.rduclos wrote:While similar events were described four years ago at http://www.mynissanleaf.com/viewtopic.p ... 9&start=10 , my recent experiences have seriously upset my faith in the safety of EVs. I have owned and driven a 2014 Leaf 39000 Km over four years, during which its quick and reliable acceleration had given me confidence in performing certain maneuvers, such as quickly merging into a traffic stream, or turning left through a gap in opposing traffic. Now I am experiencing occasional random total loss of torque during rapid acceleration, occurring usually one or two seconds after applying the increased power and lasting about a second, and sometimes repeating, then resuming full normal acceleration. I normally drive in Eco mode and often also in B mode. I live in eastern Canada with temperatures near freezing.
This is, as I said, occasional and random, and is hard to replicate. A dealer might never encounter it, so I am starting to take it seriously enough to try to analyse the circumstances when it does occur. I am also starting to drive more conservatively when in traffic (sort of spoils the fun of driving an EV).
So not an EV specific issue then...rogersleaf wrote:If my memory doesn’t fail me, that module was north of $2k USD at the time. I do remember it was enough to convince me that I never want to own one of these outside of full warranty protection.