Mg3 hybrid+ trophy high revs and not changing gear

Koz said:
I went to get something from my car today that's currently at the dealership. It looks like the car has just been stood for 3 weeks. Cob webs all over it and rust on the brakes. Not a good sight.
Click to expand...
I'd hate to see my car like that, I feel sad for you mate. :(
 
Last edited:
Koz said:
Yeah, that does make sense.

Are you having the issues looked at?

For my car, right now the dealer said they're waiting on a control assembly part... No idea what that's for. Initially they said they were waiting on a gear selector solenoid.
Click to expand...
Sorry missed your post. In respect of the high reving when going uphill it would seem that it's an annoying 'characteristic' of the car; as too many owners seem to mention it.
In these more autumnal temperatures (something we haven't been experiencing in recent years. Summer is like autumn, and autumn can be warmer than summer, but that's another discussion!!), I notice the engine runs for much longer, seemingly spending a lot more time charging the battery. Whilst of course in colder conditions this is to be expected, you have to wonder if the engine management software needs tweaking.
Meantime where I live requires driving uphill on every journey, so inevitably I get to experience the high revs all the time. I find it quite useful to watch the power graphic on the display which shows engine revs and where the power is being distributed, and thanks to the excellent illustration posted elsewhere on the forum, which shows how the drive system works; it's clearly the motor generator for the battery that the petrol engine is trying to charge. I don't think the 3 speed auto box is changing down as some have suggested, as I doubt that has any operation in battery charging.
If you follow what I'm getting at...
 
Tchoa said:
Good morning,

I have just done a short trip of more than 100 km with the car, and well I am mixed, not by the general behavior, but the engine.

I wanted to overtake a truck that had a flat tire and was slowing down and went I passed from 60 to 100, the gasoline engine started screaming, by the time I had enough speed and I felt that the speed was passing?? ?. and I did several tests again and the same engine forcing noise.

more when going down to 70, and maintaining this speed, a metallic vibration noise under the engine, (maybe also the speed which has difficulty going down?) and which persists while maintaining this speed. and I noticed that this noise occurs especially when decelerating AND maintaining speed (only at 60 or 70).

as soon as I slow down and accelerate below or above these speeds, no more noise.

in electric mode of course everything is fine.

as this is my first hybrid is this normal???
Click to expand...
Hi I think I heard this sound only once when accelerated to 102 kph but when I left the gas pedal and it dropped to 90s kph it disappeared and then I accelerated again and no sound , did you find what it was ?
 
Tchoa said:
Good morning,



more when going down to 70, and maintaining this speed, a metallic vibration noise under the engine, (maybe also the speed which has difficulty going down?) and which persists while maintaining this speed. and I noticed that this noise occurs especially when decelerating AND maintaining speed (only at 60 or 70).

as soon as I slow down and accelerate below or above these speeds, no more noise.
Click to expand...
Hello, I have the same problem as you. It's a metallic sound, like a rubbing or scraping noise. It's very unpleasant. It happens when I maintain my speed at 70 or 80 km/h, so with light pressure on the accelerator... Have you heard back from your dealer?
 
5 weeks. Still no car. No update from Bristol street motors about the repair. I'm getting to the point where I don't know what to do. I've contacted the finance company now and they said the dealer has 12 weeks to correct the issue.
 
Interesting about high engine revs. I noticed on the motorway my engine was noisily revving at 4K (assume 4000) when doing only 60mph. My standard old MGA does that too!
Surely the revs should be under 3K. Do I have a problem here? At that speed I also noticed the car was running at around 40mpg. Have not attempted any big hills yet. Urban driving is good at around the 60mpg mark. Any thoughts here?
 
mgpooter said:
Interesting about high engine revs. I noticed on the motorway my engine was noisily revving at 4K (assume 4000) when doing only 60mph. My standard old MGA does that too!
Surely the revs should be under 3K. Do I have a problem here? At that speed I also noticed the car was running at around 40mpg. Have not attempted any big hills yet. Urban driving is good at around the 60mpg mark. Any thoughts here?
Click to expand...
At 70 my car is certainly under 3k rpm, usually around 2,700 from memory…
If, as I’ve said before, the car detects an incline, it’s almost as if the three speed box changes down to second gear, not to drive the car but provide charge it seems, for the battery to power the car.
I do keep the right hand display on the energy flow graphic, to try and see what’s going where!
Either way, this is one aspect of the car, along with phantom braking when in MG Pilot, that I find annoying.
It may have been your car was going up an incline, hence it’s reason to ‘change down’.

Maybe ask the dealer to look into it. My dealer has said my car needs a new control assembly to rectify the issue. I've been waiting 6 weeks now.

The main issues for me are the high revs.
Second issue is low mpg
Third issue is a squeaking drivers seat when turning left

Koz said:
Maybe ask the dealer to look into it. My dealer has said my car needs a new control assembly to rectify the issue. I've been waiting 6 weeks now.

The main issues for me are the high revs.
Second issue is low mpg
Third issue is a squeaking drivers seat when turning left
Click to expand...
I also sometimes get squeaking from the drivers seat.
What was the nature of your high revs issue?
I have this and thought it was a ‘characteristic’ of the drive train, but if your dealer has diagnosed a problem I may get it investigated.
Btw which dealer do you use?
 
Last edited by a moderator:
KeithS said:
At 70 my car is certainly under 3k rpm, usually around 2,700 from memory…
If, as I’ve said before, the car detects an incline, it’s almost as if the three speed box changes down to second gear, not to drive the car but provide charge it seems, for the battery to power the car.
I do keep the right hand display on the energy flow graphic, to try and see what’s going where!
Either way, this is one aspect of the car, along with phantom braking when in MG Pilot, that I find annoying.
It may have been your car was going up an incline, hence it’s reason to ‘change down’.

Maybe ask the dealer to look into it. My dealer has said my car needs a new control assembly to rectify the issue. I've been waiting 6 weeks now.

The main issues for me are the high revs.
Second issue is low mpg
Third issue is a squeaking drivers seat when turning left


I also sometimes get squeaking from the drivers seat.
What was the nature of your high revs issue?
I have this and thought it was a ‘characteristic’ of the drive train, but if your dealer has diagnosed a problem I may get it investigated.
Btw which dealer do you use?
Click to expand...
I got my car from Bristol street. They're a dual dealership which sells MGs and Vauxhalls.

High revs issue seems to mainly be when doing over 50 the car does not want to change up a gear to drop the engine revs. It'll do way over 4k rpm. The mechanic said it needs a new part so either it is an issue or the mechanic doesn't know what's wrong and is guess fixing imo
 
at 80kph same for some users in France reporting weird behavior with the gear changing every 10+ seconds between 2 ... and not stabilizing
Seems the "sport mode" helps for not having that weird hesitation from the power / gearbox management !
 
An update of my '3' revving at 4K above. This was with a not really warmed up car on a short run to the next motorway exit. On getting the screen suitably switched over and re-checking with a warmed-up motor it showed just 2.6K at 70mph. So all OK I guess; strangely I have never sensed any of the gear changing folk refer to.
I wonder if a newly started engine has to rev its nuts off to provide the power being called for at speed, while re-charging the main and 12v batteries, run the heater, radio, etc.?
 
Many people seem to have reving issues with some cycles of high revs then lower revs ... especially in winter season
The way it's programmed on the ECU etc for managing power is a bit ... special and not optimized by far
 
I have my car back now after 8-9 weeks waiting. They replaced the control assembly and said this part is for the gear selections. Whether they have done anything else I have no idea they didn't mention anything else. Can't work out if it's been fixed or not, so going that's a good thing.
The fuel consumption is certainly poorer in the cold weather that's for sure. Pulling less than 40mpg at the moment
 
Yes the colder weather now is dropping the consumption into the 45 - 50mpg rang for me. About the same as the original MG3s - so not that clever really with high maintenance to-boot!
I notice on pressing the Start Button for a cold start and before moving off, the engine will start up as soon as the heater button is pressed. The 'tech' must be asking for heat and immediately blasts you with freezing cold air - so heater off as long as possible for the engine to warm up first is the only way. Very weird still getting these seemingly unnecessary high revs at times...
 
I ordered a MG3 Hybrid for my wife and was told there is one at a dealership nearby so will be ready in 3 days, Thought great news off we go. There is a problem with the Gear selector solenoid which needs to be replaced now waiting for 4 weeks to get the part. Complained to MG as the salesperson offended the wife with a couple of comments and the fact only went with that car because it was ready quick, Got a courtesy car and 400 pounds off. but still have to wait for the car. Hopefully get it before Xmas.
 
Koz said:
I have my car back now after 8-9 weeks waiting. They replaced the control assembly and said this part is for the gear selections. Whether they have done anything else I have no idea they didn't mention anything else. Can't work out if it's been fixed or not, so going that's a good thing.
The fuel consumption is certainly poorer in the cold weather that's for sure. Pulling less than 40mpg at the moment
Click to expand...
Wow...I've had my mg3 since beginning of Sept and already had it I the garage as I get a bang when I sit in the car with no engine on, they heard it abs saud it's sorted now but it's not, and also when we had our first frost of the year my heating screen wouldn't work so couldn't clear screens, put heated seat or wheel on...they couldn't find a problem and been ok since.
But now like you I've found a problem with the gears not moving up when I'm on a parkway or motorway...its revving so high, even if I take my foot of the pedal and back again its still not changing...im worried if I have to take it in and it takes 8-9wks to repair like yours it will cost me so much as they charge £15 a day for a courtesy car
 
Heidi said:
Wow...I've had my mg3 since beginning of Sept and already had it I the garage as I get a bang when I sit in the car with no engine on, they heard it abs saud it's sorted now but it's not, and also when we had our first frost of the year my heating screen wouldn't work so couldn't clear screens, put heated seat or wheel on...they couldn't find a problem and been ok since.
But now like you I've found a problem with the gears not moving up when I'm on a parkway or motorway...its revving so high, even if I take my foot of the pedal and back again its still not changing...im worried if I have to take it in and it takes 8-9wks to repair like yours it will cost me so much as they charge £15 a day for a courtesy car
Click to expand...
I wouldn’t for one second let them get away with the £15 charge. Tell them to take it up with MG UK. It’s a manufacturing fault so it’s there responsibility.
BTW the charge is just a take on, a way to make more profit.
My car has been in twice for the same fault - Engine emissions failure, and my dealer agreed not to charge me for the courtesy car. It’s due on again on Monday week for the same fault, and I don’t expect to be charged then either.
I also get high revs - about 2,300-2,500, but only when going up a hill.

Heidi said:
Wow...I've had my mg3 since beginning of Sept and already had it I the garage as I get a bang when I sit in the car with no engine on, they heard it abs saud it's sorted now but it's not, and also when we had our first frost of the year my heating screen wouldn't work so couldn't clear screens, put heated seat or wheel on...they couldn't find a problem and been ok since.
But now like you I've found a problem with the gears not moving up when I'm on a parkway or motorway...its revving so high, even if I take my foot of the pedal and back again its still not changing...im worried if I have to take it in and it takes 8-9wks to repair like yours it will cost me so much as they charge £15 a day for a courtesy car
Click to expand...
They shouldn't charge you for a courtesy car. If you're not happy with the car under the warranty see if you can take it back to the dealer. My car still doesn't seem right. I've still got the vibrating feeling through the accelerator when driving along and the revs are still really high. The car has a mind of its own unfortunately and it isn't clued up on what it should be doing most of the time.
 
KeithS said:
Going up hill the engine revs excessively, this is not linear to the accelerator, so I'm guessing the engine is charging the battery.
Irrespective of speed etc, when going uphill depending on the gradient it always goes into 'high rev mode' so presumably it's sensing the Hill and trying to charge the battery perhaps for an expected demand from the driver.
BTW I also have at times a creaking sound from the drivers seat.
Click to expand...
No squeak from the seat. The uphill scenario is very familiar.
 

Similar threads

T
High petrol consumption & high revs
Replies
16
Views
1K
Tangoed Man
T
T
Important Questions before receiving MG3 Hybrid Luxury?
2
Replies
21
Views
1K
kran
K
boatbirder
MG3 Hybrid+Heating Vs EV
Replies
9
Views
822
Pine
P
MG Clive
[6] MG3 Hybrid 10.25 features and set-up video tutorial guide (Trophy)
Replies
0
Views
690
MG Clive
MG Clive
A
ECM, PEU, TCM Update
2
Replies
20
Views
1K
mickel
M
Support us by becoming a Premium Member

Latest MG EVs video

MG Hybrid+ EVs OVER-REVVING & more owner feedback
Published
Subscribe to our YouTube channel
Back
Top Bottom