Random High Idle Fab vRS

[cjp2k]

Hi guys, my mums fabia vRS randomly has a very high idle, today it did it, car had been driven so quite warm, parked up at supermarket 10mins later start car and its idleing at 1500rmp! The only cure to this seems a quick dab on the throttle and it normally drops backdown

Skoda dealer says "cant replicate fault" so cant look into it further!

Anybody had this b4? How was it fixed, Car is about a yr old with 15k on the clock!

Cheers

Chris

[james1.9tdi]

Hi , well this is my first post so here goes:

I had this on my PD100 , changed the coolant temp sensor and all ok again.
It was intermittent and would idle at 1200rpm and then settle down again.
Went on for a while but then noticed that the temp gauge was erratic .
When warm would drop down or not read at all.
Hope this helps.

[trakmeister]

Hi
Have you found out what the problem is yet?
My vrs is doing the same.
It's going back to the dealer next week to have another try to see if they can find the reason for this fault.
Mike

[trakmeister]

Found out the problem. The throttle pedal was not returning to the zero position when I took my foot off the pedal, so the revs varied from 750 to whatever the position the pedal stayed at.
The Skoda Dealer I took it to firstly blamed the 17'' wheels I had fitted, then the remap, both of which were clearly not the fault.
But 10 minutes with someone who knows what they are about found the problem.
Thanks Jim from Star Performance.
Now all I have to do is refit the wheels etc, etc.
Mike

[bobjim]

what should the tick over be on a Vrs
mines just under 1k

[Conshine]

Yea, mine is just below 1000rpm, somewhere near 850 to 900

Ben

[cjp2k]

Originally Posted by trakmeister

Found out the problem. The throttle pedal was not returning to the zero position when I took my foot off the pedal, so the revs varied from 750 to whatever the position the pedal stayed at.
The Skoda Dealer I took it to firstly blamed the 17'' wheels I had fitted, then the remap, both of which were clearly not the fault.
But 10 minutes with someone who knows what they are about found the problem.
Thanks Jim from Star Performance.
Now all I have to do is refit the wheels etc, etc.
Mike

Hi thanks for the reply, I am still suffering with this, at the garage again, but they cant replicate the fault, this is my second dealer to try and fix the problem!!

Did you get the pedal replaced, or just freed off? Also how much did it cost? Willing to pay to fix this myself rather than have the hassle of skoda dealers!!

[trakmeister]

Originally Posted by cjp2k

Hi thanks for the reply, I am still suffering with this, at the garage again, but they cant replicate the fault, this is my second dealer to try and fix the problem!!

Did you get the pedal replaced, or just freed off? Also how much did it cost? Willing to pay to fix this myself rather than have the hassle of skoda dealers!!

Hi,
Once I found out I could bring the revs back down to the correct idle speed by pushing up the pedal, the problem seemed to stop after a few days.
The car did go back to Skoda to check this fault and fix leaks in the rear. They found nothing wrong with the pedal. (work done under warranty)
If you have vagcom you can check the throttle position to see if it is returning to zero after blipping the throttle. I did this myself and it always returned to zero, so I don't know if this fault will return.
Mike

[trundlenut]

I have this with my Octy (not a PD though) and I suspect the coolant temp sensor, I did have an intermittant fault with this sensor and it was showing implausible values.

It only does it when the engine is warm and I tried checking the accelerator pedal and it wasn't sticking or anything. I'm assuming that the sensor is giving silly temps when warm and the ecu shoves too much fuel in and it idles too fast (may be completely wrong though).

It tends to stop quite suddenly like the ecu suddenly realises or the sensor suddenly starts reading right.

The sensor in my car is the old black version - I don't know if this is the same on the PD engine. I think there is a newer version which is green.

[cjp2k]

Long Time no post, however finally got it fixed, New Pedal and all sorted thanks to MSB Skoda in darlington who listened to me and swapped out the pedal, unlike certain other dealers whos idea to fix it was just drop the standard idle to 750!!

[biggiep]

I actually had this on my SE and basically dropping the idle will only cure it for a little while. Basically because they are "fly-by wire" there is a little sender unit which tells the car about the revs, every time i stoped at traffic lights it would surge to anything between 1500 revs and 3000!!!!! It got worse over time so in the end I left it with them (now gone Woodheads) andhad their loan roomster, infact that was a good chance to practice two wheel drive drifting haha! The replaced the sender uni and its been fine now :-)

Anyway get them to look at the case history for mine at a dealer if you like number 158 of the special editions.

[dxg]

I've now got this in my SE at 16k miles.

It's always had trouble finding an idle. On a stone cold engine it would hunt up to around 1200, then drop down to 850ish - almost stalling, then after while settle on the c. 1,000rpm it should always have been at.

A few weeks back it starting sitting immediately 1,500rpm when on a hot engine and would only budge back to 1k after a blip of the throttle.

Now it's started doing the high idle on a cold engine, too. Which is a bit odd as the symptoms would otherwise suggest a coolant sensor. Pretty embarrassing when you're sitting at lights and the engine's reving away...

So I guess it's the coolant sensor (cheap) or the throttle position sender (expensive). It will be interesting to see which the dealer goes for...

Wouldn't be so bad, but the dash also has to come out to fix another problem...

[Conshine]

Mine still idols at about 900 even when I start it when it's cold in the morning. I always thought the vRs's (well most cars) were drive by wire? so I would think it would be the pedal at fault here.

It does change tone after a few minutes in cold weather though.

[dxg]

The throttle position sender is in the pedal - or at least, I'm talking about the pot in the pedal box if I haven't got the right term.

Interesting that yours has a low idle - perhaps that's normal.

[dxg]

Hmm... Mine just keeps getting worse. It's been into the dealers and as no fault code is logged (but surely it would log implausible readings?) then there's no fault.

YouTube - High Idle

First video shows the fault on a stone cold engine - the second on a warm engine.

[VRSDanny]

Originally Posted by trakmeister

Found out the problem. The throttle pedal was not returning to the zero position when I took my foot off the pedal, so the revs varied from 750 to whatever the position the pedal stayed at.
The Skoda Dealer I took it to firstly blamed the 17'' wheels I had fitted, then the remap, both of which were clearly not the fault.
But 10 minutes with someone who knows what they are about found the problem.
Thanks Jim from Star Performance.
Now all I have to do is refit the wheels etc, etc.
Mike

I MAYBE WRONG BUT HOW ON EARTH WOULD THAT BEAR ANY RELEVANCE TO HIGH IDLE?

I didnt know wheels altered ur idle revvs?!?!?!?!?!

[Peddthedon]

Just had my car serviced and got a high idelling problem fixed. The problem was a broken throttle pedal. Apparently there was a recall on the new Fabia with this same problem and some of the last Fabia 1's had the same throttle fitted. Hope this helps.

[hebrew]

Looks like i'll have to get on to the dealers then.
My vRS SE keeps doing it, sometimes as high as 2000rpm.
Told them about it when it went in to be serviced but they couldn't make it do it so couldn't rectify it.

[DPS]

I had this problem on my vRS SE recently.

I got the impression from my dealers, Simpsons of Colne, that this was a known issue with the "fly by wire" sender on the accelerator pedal. They ordered a replacement unit without even seeing the car and fitted it in less than an hour while I waited.

As always, great service from Simpsons.

[dxg]

Originally Posted by hebrew

Looks like i'll have to get on to the dealers then.
My vRS SE keeps doing it, sometimes as high as 2000rpm.
Told them about it when it went in to be serviced but they couldn't make it do it so couldn't rectify it.

Exactly the same story from my dealer - hence the videos. It's booked back in Tuesday, so we'll see if they make any difference...

[hebrew]

Originally Posted by DPS

I had this problem on my vRS SE recently.

I got the impression from my dealers, Simpsons of Colne, that this was a known issue with the "fly by wire" sender on the accelerator pedal. They ordered a replacement unit without even seeing the car and fitted it in less than an hour while I waited.

As always, great service from Simpsons.

Might be worth a blast down the A65 to take it there then.
I'll give mine a ring today and see if they know anything more about it than they did.

[hebrew]

Originally Posted by dxg

Exactly the same story from my dealer - hence the videos. It's booked back in Tuesday, so we'll see if they make any difference...

How did you come on with your dealer?

I got on to mine and i have to book the car in and they need to make it do it before they can fix it. They wouldn't here of it being a common/known fault, they said they'd never heard of any others doing it.
When i said about someone else calling their dealer about same thing and the dealer ordering the parts in without even seeing the car, they said they couldn't do that either.
They would need to plug it into the computer, but if nothing was logged and they couldn't make the car do it, they wouldn't be able to fix it.

[MoggyTech]

I had this on my 07 plate VRS LE and mentioned it to my dealer (West End Skoda Uphall) when they were replacing a door mirror. They changed the throttle module there and then without hesitation.

The problem with intermittent idle speed caused by the throttle pedal module, is it doesn't log a fault code unless the sensor goes completely tits up. The design is flawed, as there should be a separate throttle pedal closed switch, to tell the ECU to ignore the FBW module if it's sending out bad position data. As it is, the ECU just looks at the pedal position sensor and off you go, like it or not.

So it's a dangerous flaw, and if you explain that to the dealer, they should change the module there and then IMHO.

Mine decided to do it as I pulled into a car park in 1st gear. It held 1500 RPM, and needed a rapid declutch and brake to avoid bewildered motorists trying to get out of my way

The dealers should know about this, and they should know, there's no chance in hell of it doing it while they have the car.

[dxg]

My dealer is refusing to change it.

I almost went into the back of someone a few days ago because it effectively changes the bite point of the clutch unexpectedly.

Dealer wants the car for a whole week to "see if it will do it for them." Haven't had time to sort the insurance for a courtesy car out yet...

They refused to look at the videos saying "they could be anyone's"

Not a happy bunny.

[reforse]

I had this problem on my old cavalier (reg1993) so i dont know if the solution is relevant. I had the idle speed control valve cleaned which solved it for about 9 months, cost about £10 the first time, after that I just asked them to do it as part of the service each year.