Potentially Dangerous High Engine Rev

[ScottyC]

Thank you for your input. It's extremely constructive and not at all keyboard-warrior-esque. I look forward to more productive ideas from you in the future.

Stand back...

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[jeduncan14083]

Exactly....there are other options. In today's litigious society, people are so quick to hire an attorney....go trade the dang thing in and get something else, no one is holding a gun to your head forcing you to keep the vehicle.

To be clear I haven't engaged an attorney. I want to see what options the dealership and FMC can come up with before I do that. Ideally, I would love it if the dealership staff could replicate the problem and catch it on a scanner, because I obviously am in a conundrum if I pick it up and continue driving it. And, if I get in an accident as a result of a known defect, I suspect that I could also be liable for that if the insurance company caught wind of it.

 

[ScottyC]

Yeah, thing is that it did go full bore, and that power was definitely transferred to the wheels. Luckily I was sitting on glare ice so the tires just spun really fast and the truck went nowhere. Had it been on dry ground I would have without question rammed into the car in front of me. I'm already lawyering up, because the "it might be a fluke" gamble isn't one I'm willing to take with an issue like this.

To be clear I haven't engaged an attorney. I want to see what options the dealership and FMC can come up with before I do that. Ideally, I would love it if the dealership staff could replicate the problem and catch it on a scanner, because I obviously am in a conundrum if I pick it up and continue driving it. And, if I get in an accident as a result of a known defect, I suspect that I could also be liable for that if the insurance company caught wind of it.

Pro tip #1, make sure you remember what you posted. You might want to write it down somewhere.

 

[Grabber Rick]

A few years back there was a Toyota model that “floored” itself while driving. Led to a couple fatalities & a major recall.

I don’t recall the defect then & imagine the issue with the Hybrid is not the same - but still unsettling if you’re behind the wheel with your kid.

That was the Prius.

 

[Grabber Rick]

I have a 23 xlt hybrid same as OP. In Buffalo NY so its cold. Never has this happened to me. Full throttle in idle,, really ? I would imagine the engine would rev so high to over its rpm limit..... Does mine go up?, sure maybe 1500 rpm. my guess.

Things I noticed its in park or neutral. The throttle does pretty much NOTHING. I step on throttle but rpm does NOT rev up like a regular gas engine. it ignores my throttle input. Again in park or neutral. NOT in drive.

If it is really going 4000 rpm or higher on its own it is NOT normal.

I was going to say the same thing. I tried reving up my 23 Hybrid and it did nothing while pressing the pedal. I figured a safety feature and if you put in gear then the engine revs up.

 

[710-oil-614]

To be clear I haven't engaged an attorney. I want to see what options the dealership and FMC can come up with before I do that. Ideally, I would love it if the dealership staff could replicate the problem and catch it on a scanner, because I obviously am in a conundrum if I pick it up and continue driving it. And, if I get in an accident as a result of a known defect, I suspect that I could also be liable for that if the insurance company caught wind of it.

Instead of an OBDII scanner you could also install a dash cam with front and cabin facing cameras so next time it happens you can capture the sound and movement of the Maverick.

You’ve claimed a dangerous behavior is occurring without any evidence to back it up while others have experienced a much less serious phenomenon of the engine revving to warm up and the brakes pulsating (brake booster) but you’re suggesting your Maverick is ready for a 0-60 sprint at full throttle unless you immediately shut off the engine.

If you truly feel it is unsafe you should trade it in and get something that gives you confidence when driving it.

 

[jeduncan14083]

Pro tip #1, make sure you remember what you posted. You might want to write it down somewhere.

You got me there, I'll admit that

 

[jeduncan14083]

Instead of an OBDII scanner you could also install a dash cam with front and cabin facing cameras so next time it happens you can capture the sound and movement of the Maverick.

You’ve claimed a dangerous behavior is occurring without any evidence to back it up while others have experienced a much less serious phenomenon of the engine revving to warm up and the brakes pulsating (brake booster) but you’re suggesting your Maverick is ready for a 0-60 sprint at full throttle unless you immediately shut off the engine.

If you truly feel it is unsafe you should trade it in and get something that gives you confidence when driving it.

Maybe both. It's definitely not a slight rev, and it would be great to get on camera. I'm already shopping for something new since it's likely there won't be any kind of resolution to whatever is causing the issue. Not a lot of vehicles on the market competing with the hybrid mav, unfortunately, in terms of utility and fuel economy.

 

[SpaceCowboy]

Maybe both. It's definitely not a slight rev, and it would be great to get on camera. I'm already shopping for something new since it's likely there won't be any kind of resolution to whatever is causing the issue. Not a lot of vehicles on the market competing with the hybrid mav, unfortunately, in terms of utility and fuel economy.

How long have you owned the vehicle? It's a 23 right? You've been through a few winters and this a new behavior for the vehicle? I live in michigan and when it's cold mine fires up on remote start or anytime whatever conditions are set in the ECU. I'm familiar with the pulsing as well but it's usually 1 or 2 stop signs and it's done.

 

[710-oil-614]

Maybe both. It's definitely not a slight rev, and it would be great to get on camera. I'm already shopping for something new since it's likely there won't be any kind of resolution to whatever is causing the issue. Not a lot of vehicles on the market competing with the hybrid mav, unfortunately, in terms of utility and fuel economy.

Well there is a huge delta between slight rev and wide open throttle.

EDIT: And my point is NOT to discredit what you are reporting, it's just not something that any members have experienced to the severity to which you have reported it.

No doubt the 2.5L is coarse and loud when cold and it starts up. The 2.5L also have variable valve timing and the capability to run a normal otto cycle (although Ford does not) I think that it opens up to warm up. Think "V-TEC" when you cross 6,800rpm and it opens up - only the Mav is doing that between 1,800-2,300 RPM and the eCVT is only using the power being generated proportionate to throttle input.

I also think the pulsing in the brake pedal is unrelated and likely due to the brake booster (which has been known to have issues).

 

[HeyBales]

I was going to say the same thing. I tried reving up my 23 Hybrid and it did nothing while pressing the pedal. I figured a safety feature and if you put in gear then the engine revs up.

You have to press to 75-85% (I forgot exact figure from logs) of gas pedal movement. And then it doesn't rev that high anyway from there to floor.
Same amount of press as when you manually start the ICE on 1st drive of day.

ETA:
Correction to this.
Pedal to 50% to start it.
Pedal to a tad over 60% to rev it higher.

 

[jeduncan14083]

How long have you owned the vehicle? It's a 23 right? You've been through a few winters and this a new behavior for the vehicle? I live in michigan and when it's cold mine fires up on remote start or anytime whatever conditions are set in the ECU. I'm familiar with the pulsing as well but it's usually 1 or 2 stop signs and it's done.

I've owned it since new, yeah. This just started last week. I'm also here in Michigan.

 

[sprubs]

I've experienced the having to hold the brake down hard to keep from inching forward at the lights but never the full throttle thing. the former hasn't happened in a long time though.

 

[jeduncan14083]

Well there is a huge delta between slight rev and wide open throttle.

EDIT: And my point is NOT to discredit what you are reporting, it's just not something that any members have experienced to the severity to which you have reported it.

No doubt the 2.5L is coarse and loud when cold and it starts up. The 2.5L also have variable valve timing and the capability to run a normal otto cycle (although Ford does not) I think that it opens up to warm up. Think "V-TEC" when you cross 6,800rpm and it opens up - only the Mav is doing that between 1,800-2,300 RPM and the eCVT is only using the power being generated proportionate to throttle input.

I also think the pulsing in the brake pedal is unrelated and likely due to the brake booster (which has been known to have issues).

To be fair I have no way of knowing what the exact RPM's were, since it doesn't have a tach, but I do know that it was revved wayyyy higher than it's ever revved in cold temps, like approaching, maybe in the neighborhood of 4-5k at least. And for clarification, it didn't push thru the brakes, but the high rev did translate to the wheels when I let off the brakes. Whether it was actually delivering FULL power I obviously can't quantify. However, I can say with confidence that it was delivering a hell of a lot more than normal "idle" power to the wheels.

 

[AVC]

For us Hybrid owners, it'd be great if you report back what they discover or not. Certainly understand not trusting it when it has run amuck on multiple occasions.

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