Surging when stopped. Anyone else?

[Kenv24]

I haven't noticed it at all on my 2025 and have been paying attention because of these threads. My morning routine is to back out of my garage, go down the driveway with electric, pull onto the highway in front of my house, start down the hill and the engine kicks on. I go 0.4 miles to the bottom of the hill and stop. No pulsing or shuddering at all. I pull away and drive highway for about 8 miles before the first intersection with a traffic control device. All the transitions of the engine/motor and motor/brakes are very seamless. I'm really impressed.

Yeah....but do you know how you get it to do what ALL the above posts are talking about??? Do exactly like you're doing...BUT...when you get to the end of your driveway....stop for a second and put the brake on. Hybrid will do the surging every time. My morning routine is the exact same every day. Get in the truck...go down my driveway (level)....open my gate with the remote as i'm rolling. Stop outside the gate. Foot on the brake to shut the gate and set my map to work to see traffic. Truck ONLY surges on THAT stop. By the time I get to the stop sign to leave the neighborhood...the surging is done. AND...it does not do it the rest of the day. In and out for lunch...drive home...stop to shop....never surges again in the same day. Get up the next morning...same routine....truck only surges on the stop outside my gate. First and only stop for the day. Try it. EDIT...Oh..and to de-bunk the temperature theory....It did it all winter....temps down to the 30's in Januray/February and does it all summer...up to 100 here in Tejas.......

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[Red Eyes - Wide Shut]

Yeah....but do you know how you get it to do what ALL the above posts are talking about??? Do exactly like you're doing...BUT...when you get to the end of your driveway....stop for a second and put the brake on. Hybrid will do the surging every time. My morning routine is the exact same every day. Get in the truck...go down my driveway (level)....open my gate with the remote as i'm rolling. Stop outside the gate. Foot on the brake to shut the gate and set my map to work to see traffic. Truck ONLY surges on THAT stop. By the time I get to the stop sign to leave the neighborhood...the surging is done. AND...it does not do it the rest of the day. In and out for lunch...drive home...stop to shop....never surges again in the same day. Get up the next morning...same routine....truck only surges on the stop outside my gate. First and only stop for the day. Try it. EDIT...Oh..and to de-bunk the temperature theory....It did it all winter....temps down to the 30's in Januray/February and does it all summer...up to 100 here in Tejas.......

Thank you, Exactly! Outside temp has nothing to do with it unless maybe above 80 or more. Sometimes it does surge harder when cooler. I did take it in to the dealer and they kept it for 2 days. They reprogrammed the TCM as I said before. The good thing is that I have written evidence.

 

[Busa789]

Yeah....but do you know how you get it to do what ALL the above posts are talking about??? Do exactly like you're doing...BUT...when you get to the end of your driveway....stop for a second and put the brake on. Hybrid will do the surging every time. My morning routine is the exact same every day. Get in the truck...go down my driveway (level)....open my gate with the remote as i'm rolling. Stop outside the gate. Foot on the brake to shut the gate and set my map to work to see traffic. Truck ONLY surges on THAT stop. By the time I get to the stop sign to leave the neighborhood...the surging is done. AND...it does not do it the rest of the day. In and out for lunch...drive home...stop to shop....never surges again in the same day. Get up the next morning...same routine....truck only surges on the stop outside my gate. First and only stop for the day. Try it. EDIT...Oh..and to de-bunk the temperature theory....It did it all winter....temps down to the 30's in Januray/February and does it all summer...up to 100 here in Tejas.......

I'll try it. It seems like I've waited for a car or two at the end of my driveway but maybe the ICE engine wasn't on.

 

[Busa789]

Ok, 2025 Lariat built in October of 2025 and it has 1361 miles on it. It sat all night and I drove it this morning. Ambient temp was 32 with light snow. I backed out of the detached garage on electric, got moving down the drive and stabbed the throttle and the engine started. About 5 seconds later I put the brakes on and came to a stop. I tried with the brake hold on, off, and with the truck creeping. There was absolutely no surging. I went to the bottom of the hill, about 0.4 miles, stopped and waited for cross traffic, and no surging. This thing handles the engine on/off and regen braking/friction breaking transitions perfectly.

 

[Kenv24]

Ok, 2025 Lariat built in October of 2025 and it has 1361 miles on it. It sat all night and I drove it this morning. Ambient temp was 32 with light snow. I backed out of the detached garage on electric, got moving down the drive and stabbed the throttle and the engine started. About 5 seconds later I put the brakes on and came to a stop. I tried with the brake hold on, off, and with the truck creeping. There was absolutely no surging. I went to the bottom of the hill, about 0.4 miles, stopped and waited for cross traffic, and no surging. This thing handles the engine on/off and regen braking/friction breaking transitions perfectly.

Yeah, but actually if you read your post, you went “too far.” You drove it too much to experience that INITIAL first stop surging. If you get what I’m saying.

 

[Busa789]

Yeah, but actually if you read your post, you went “too far.” You drove it too much to experience that INITIAL first stop surging. If you get what I’m saying.

Not really. It's maybe 30 yards from where I hit the throttle to where I stopped. I'll try it again tomorrow going from the throttle directly to the brakes, but if that's the only way I get it to happen it would be a non-issue.

 

[Kenv24]

Not really. It's maybe 30 yards from where I hit the throttle to where I stopped. I'll try it again tomorrow going from the throttle directly to the brakes, but if that's the only way I get it to happen it would be a non-issue.

Yeah, maybe the difference is because you’re hitting the throttle or the ice is on….I believe when I leave my spot in the driveway to where I stop outside my gate the ice doesn’t come on and I always get the surging on that first stop. I’ll check again tomorrow morning and see if I’m full electric the whole time.

 

[HeyBales]

True - it's not the cold exactly. But it helps.

It's ICE initial rough running before sensor warmup (cat not at 1000 F yet) when the HVB is topped off at 70% almost.
Or HVB is too cold and charge isn't being sent to it yet, no matter where the HVB SOC% is.

But cold can make it easier to hit those conditions.
Due to ICE having been running before park for heat - you may be right at 70% already leaving in morning, or reach it easily within the time it takes to get cat to 1000.
It takes just a touch longer when colder, especially if coasting downhill losing heat easier.

Cold required for the no charge effect.

In warmer weather - just harder to hit the right conditions - but may be setup to do so frequently.
Always arrive home with almost fully charged HVB.
Next morning start has initial ICE turn on right as you are stopping.

Considering you'll find posts where the damper was replaced under warranty very early on, I'm guessing some of the outliers of extreme reactions are that problem.
Normal rough sounding idling, or slight shake & shimmy - where neutral makes it disappear - that's the expected reaction.

Also - really punching the throttle when cold causes it to not stay in EV mode during the warmup of the cat - so ICE probably warms up faster by the first stop even if in 5 sec.
Normally it can take 30 sec even when cooler out, engine just at idle, no torque being applied but traction motor taking the load. If you really ask for power - that's thrown out the window.

Also - if stabbing the throttle sounds like I think it sounds and is normal daily routine - not really the recommended gentle start for a cold engine.
But maybe you meant still in park at that point - and merely getting the ICE turned on for a good warmup.

Someone's post about driveway to highway in EV, and then jumping on highway - that sounds rough.

 

[Busa789]

I quickly stabbed the throttle today only just to get the ICE to start, otherwise I get to the end of my driveway in ELEC. As I understood it, a very recently started ICE causes the pulsing, so it needs to be running. Typically, I am ELEC to the end of the drive, then get on the highway and it starts as I'm going down the hill. It doesn't hurt the vehicle at all to let the ICE start on the highway as I don't reach 45 mph downhill before the stop.

At the end of the day, If I am unable to replicate the symptoms described, I don't think it's likely they will become an annoyance to me.

 

[HeyBales]

I quickly stabbed the throttle today only just to get the ICE to start, otherwise I get to the end of my driveway in ELEC. As I understood it, a very recently started ICE causes the pulsing, so it needs to be running. Typically, I am ELEC to the end of the drive, then get on the highway and it starts as I'm going down the hill. It doesn't hurt the vehicle at all to let the ICE start on the highway as I don't reach 45 mph downhill before the stop.

At the end of the day, If I am unable to replicate the symptoms described, I don't think it's likely they will become an annoyance to me.

HVB at 70%, or below 20 F where it's not going to charge full rate - are also needed.

If you had room and temp to charge HVB that soon in your drive - then unlikely to show the issue.
You may never start your morning drive with a full HVB, or cold enough, that it matters.

Then you got someone in the desert, able to experience it almost every time!

Glad to know not needing to punch it up to 75 on cold engine. That's what I was picturing.
The polar opposite of the advice to start out gentle on a cold engine until it's at operating temp.

 

[Busa789]

HVB at 70%, or below 20 F where it's not going to charge full rate - are also needed.

If you had room and temp to charge HVB that soon in your drive - then unlikely to show the issue.
You may never start your morning drive with a full HVB, or cold enough, that it matters.

Then you got someone in the desert, able to experience it almost every time!

Glad to know not needing to punch it up to 75 on cold engine. That's what I was picturing.
The polar opposite of the advice to start out gentle on a cold engine until it's at operating temp.

My Maverick will see -30F while I have it. I've seen -34 a couple times. Windchill much colder of course. Even with the Camry it would take me a mile or longer to get to 60 mph in the cold. You can feel how the car responds and when it's ready to take more throttle.

 

[Red Eyes - Wide Shut]

That's great for you. Then you don't have a Problem. It doesn't mean that myself an others don't have this issue.

 

[Kenv24]

That's great for you. Then you don't have a Problem. It doesn't mean that myself an others don't have this issue.

Yeah, that’s great… but personally myself I don’t look at it as an “issue”. I look at it as just a little “nuance” of having a Maverick hybrid truck. I don’t think it’s something that needs to be recalled for or even fixed. Some say they may not have the problem. I’ve had it since day one that I’ve owned my hybrid from August 2024. If You reread my posts it only happens to ME on the first stop of the morning…at the end of my driveway. The rest of the day… no issues.

 

[Mavster Mechanic]

Yeah....but do you know how you get it to do what ALL the above posts are talking about??? Do exactly like you're doing...BUT...when you get to the end of your driveway....stop for a second and put the brake on. Hybrid will do the surging every time. My morning routine is the exact same every day. Get in the truck...go down my driveway (level)....open my gate with the remote as i'm rolling. Stop outside the gate. Foot on the brake to shut the gate and set my map to work to see traffic. Truck ONLY surges on THAT stop. By the time I get to the stop sign to leave the neighborhood...the surging is done. AND...it does not do it the rest of the day. In and out for lunch...drive home...stop to shop....never surges again in the same day. Get up the next morning...same routine....truck only surges on the stop outside my gate. First and only stop for the day. Try it. EDIT...Oh..and to de-bunk the temperature theory....It did it all winter....temps down to the 30's in Januray/February and does it all summer...up to 100 here in Tejas.......

It's a cold ENGINE that matters.
Not necessarily the outdoor temperature.

Cold for the engine is generally regarded as less than 120°F.

It colder weather there will be naturally more opportunities to witness the behavior.

 

[Kenv24]

It's a cold ENGINE that matters.
Not necessarily the outdoor temperature.

Cold for the engine is generally regarded as less than 120°F.

It colder weather there will be naturally more opportunities to witness the behavior.

Agree…but some were making it seem like the outside temperature was affecting it. Engine temp does seem to correlate to my morning first stop surging.

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