Maverick Hybrid engine surge.

[HeyBales]

Not engine braking unless the “L” is pressed and I was going 10 mph.

Can you see in your logs what the HVB SOC was approaching at that time of high RPM?

Of course that type of high RPM has no pull with it, no torque - just wasting the electric power that the battery can't take.

And if cold it can't take as much, until warmed up.

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[Mavster Mechanic]

Not engine braking unless the “L” is pressed and I was going 10 mph.

It can and will engine brake at any time it feels necessary. The "L" button is never a requirement. Engine brake works down to very low speed. 3 MPH I believe is the actual value.

 

[HeyBales]

It can and will engine brake at any time it feels necessary. The "L" button is never a requirement. Engine brake works down to very low speed. 3 MPH I believe is the actual value.

That's when you get the fun clunkiness, never mind surging.

My downhill to highway will often have me at full HVB SOC, just as I'm braking for red light and coming to a stop.
Nothing like the ICE being spun up due to recharge limit just as the pads are grabbing due to slow enough, and just as I'm stopping.
Literally within a couple secs - and it clunks and you feel it in brake pedal more than mere pad engagement, with strange whine of ICE RPM barely coming up, and then being stopped.

 

[Mavster Mechanic]

That's when you get the fun clunkiness, never mind surging.

My downhill to highway will often have me at full HVB SOC, just as I'm braking for red light and coming to a stop.
Nothing like the ICE being spun up due to recharge limit just as the pads are grabbing due to slow enough, and just as I'm stopping.
Literally within a couple secs - and it clunks and you feel it in brake pedal more than mere pad engagement, with strange whine of ICE RPM barely coming up, and then being stopped.

Yup.

Happens to the best of us.

While there can be exceptions, a whole lot of complaints / worries are due to people being unfamiliar with the more peculiar aspects of the hybrids.

To avoid what you've described; I've been known to put it in pretend Neutral* to avoid the engine run-up on known commonly used routes when my battery is full. One of the benefits of having a scangauge attached full time.

* There is no true neutral in hybrids. Only simulated neutral. The gears are in mesh permanently, 100% of the time. While parked, and while being towed wheels down. But that's another can of worms.

 

[cmachouse05]

I am curious if anyone else in this forum has had their Hybrid Maverick engine race to full throttle unexpectedly?
Last week, I allowed my son to drive my truck, and he called me to explain how the truck, shortly after starting up the engine, raced to full throttle.
I told him he must have had his foot covering the accelerator at the same time as depressing the brake. Nothing to worry about, I will check the vehicle later.
Little did I know that the same thing happened to me just a couple of days later. I had just stopped to refuel and proceeded to start the vehicle just before engaging the transmission, the engine raced up to full throttle. I was startled for a moment and shut it down by turning off the key. This has never happened before in this vehicle in the three years that I have owned it. Has anyone else experienced this or anything similar?

It happened to me recently during the first cold spell here in Michigan. I was concerned about it and posted it here. This reply from a fellow member made sense to me…
”It’s the ICE charging the HV battery, it’s fine. My Maverick does, as did my Toyota Hybrids, the same thing if the HV battery had a low charge.”

 

[22XLThybrid]

Not engine braking unless the “L” is pressed and I was going 10 mph.

Engine braking occurs without "L" pressed. A long hill and the HV is full so it can't regen it has to do something. I have a long hill where this happens everytime. There is a light at the bottom of the hill. If I stop, the ICE goes to stop.

 

[johnDeere]

Here is a picture showing RPM and MPH.
As you can see the truck was not moving.

 

[DGMavLove]

That's a good screenshot that we've been asking folks reporting for. That does validate the spike in RPMs to upper 3000s but it surged for 1 second before backing off.

A one second surge could kill a pedestrian in the crosswalk or cause much physical damage hiiting the car in front of you if your foot wasn't on the brake. In any case, doesn't seem healthy for the engine.

 

[skinnyboy]

Two Toyota Hybrids I owned did this.
(For brief engine brake when the hybrid battery was full, cold, or both.)

A Rav4 Hybrid does this.
A Venza Hybrid does this.

With better cabin sound proofing I will say it is much less noticeable in the Toyotas.

They spiked to 3500-4000 rpm while stopped, causing the vehicle to try to pull forward as the inertia of the generator accelerating fed through to the trans. output? Our Toyota would absolutely generate using higher than normal engine speed, as does our Maverick, but that is completely different to what I have experienced on occasion in our '22 Hybrid. It is very disconcerting when it tries to pull ahead out of the blue with your foot on the brake, and I really hope my daughter doesn't experience it while driving the Mav., since she likes it.

Cheers.

 

[710-oil-614]

A one second surge could kill a pedestrian in the crosswalk or cause much physical damage hiiting the car in front of you if your foot wasn't on the brake. In any case, doesn't seem healthy for the engine.

Engine revs don’t equate to acceleration with the HF55 drivetrain.

 

[VA Flash]

They spiked to 3500-4000 rpm while stopped, causing the vehicle to try to pull forward as the inertia of the generator accelerating fed through to the trans. output? Our Toyota would absolutely generate using higher than normal engine speed, as does our Maverick, but that is completely different to what I have experienced on occasion in our '22 Hybrid. It is very disconcerting when it tries to pull ahead out of the blue with your foot on the brake, and I really hope my daughter doesn't experience it while driving the Mav., since she likes it.

Cheers.

I feel you. The first time I felt my truck creep forward while I was stopped, I thought someone had bumped me from behind. on a few other occasions, I thought I wasn't holding the brake pedal down hard enough and the truck lunged forward. Lately, I've been trying to remember when coming to a complete stop, to press harder on the brake pedal and haven't felt it creep forward.

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