Ford engine (TDCi) idling at higher revs briefly when chaging gear

g0g

Hi all,
I'm no car expert so I'll describe my query as best I can and hopefully someone can explain what might be happening. I'm driving a 2012 Mondeo estate. The idling speed of the engine seems to be around 750-800rpm. It's only 3 months old now, but I'm finding it suddenly behaves slightly different when I'm changing gears. Say in the current gear I'm at 2-3k revs and I take foot off accelerator and press clutch down (definitely fully) to change gears. The revs appear to hover somewhere between 1.5-2K rpm for more than a split second. Am I missing out on something here? Do modern cars interpret that you're changing up a gear and maintain higher revs to help you out or something? I know this all sounds a bit blonde or something, but I'm genuinely curious as to why it's happening or if it's normal? I've had about 5 other company cars since 2006 (incl one Mondeo) and never noticed similar on the others.
Thanks in advance!

CiniO

If you change from 2k - 3k rpm to next gear, most likely rpm on next gear would be about 1.5k to 2k, so you should be grateful to your car that he is keeping adequate rpm for you

PS - yes, I think it is meant to be like that.

g0g

CiniO wrote: »

If you change from 2k - 3k rpm to next gear, most likely rpm on next gear would be about 1.5k to 2k, so you should be grateful to your car that he is keeping adequate rpm for you

PS - yes, I think it is meant to be like that.

Thanks for the reply. Sorry, I also meant to say that after a couple of seconds it drops off to the normal 750-800rpm, but is it genuinely hovering higher to assist make a smoother gear change while accelerating?

George Dalton

I don't see any circumstances where it would be normal for the engine to reach idle rpm levels during a routine gear change so maybe you need to look at your driving style.

Having said that I have noticed that a lot of cars will idle at higher rpm when the car is moving than when it is stationary so this probably explains your issue.

Fishtits

I'm driving a 2012 Mondeo estate

Basically you are not happy about something.

OP, the car is under warranty, why are you posting here?

Go back to the dealer you bought the car from.

Let us know how you got on.

g0g

George Dalton wrote: »

I don't see any circumstances where it would be normal for the engine to reach idle rpm levels during a routine gear change so maybe you need to look at your driving style.

Having said that I have noticed that a lot of cars will idle at higher rpm when the car is moving than when it is stationary so this probably explains your issue.

Thanks yeah I'm not in the habit of taking 5 seconds to change between gears, but just on a few occasions for whatever reason (can't think off the top of my head sorry) if I wasn't instantly engaging the next gear I could hear that the revs weren't dropping right down straight away, but hovering at that higher level for a second.

Fishtits wrote: »

Basically you are not happy about something.

OP, the car is under warranty, why are you posting here?

Go back to the dealer you bought the car from.

Let us know how you got on.

It's a company (lease) car so I'm less inclined to go racing back to the dealer in case it's a standard/new phenomenon in cars. I did ask the lease company rep to see if he knew what it was though...

ianobrien

OP, just a couple of things to point out.


1. There may be a slight delay in the response of the FBW throttle. I know the first time I drove a car with a FBW throttle I had to adjust by driving style for the inherent delay compared to a cable throttle.

2. Some cars have a "thing" built in in that if you depress the clutch and leave it in gear when driving, the revs can stay high for a moment or two. I know my car does it. I imagine it's for matching engine speed to road speed for smooth gear changes.

3. Try and drive another vehicle of the same model and year. If that does it, adjust your driving style. If it doesn't, back to the dealer with you...

antodeco

Being honest, if it's only sitting about 800rpm when you're in gear and driving, I'd be saying bye bye to your engine. That's sounds waaaay to low an RPM for me. Saying that, maybe modern diesels drive at that?

sentient_6

antodeco wrote: »

Being honest, if it's only sitting about 800rpm when you're in gear and driving, I'd be saying bye bye to your engine. That's sounds waaaay to low an RPM for me. Saying that, maybe modern diesels drive at that?

You misread the OP.