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Author Topic: No power, Accelerator stopped working -then resets  (Read 6881 times)

Offline johnsimpson64

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  • Model: Galaxy Mk2
  • Spec: 2002 1.9tdi Ghia
No power, Accelerator stopped working -then resets
« on: September 01, 2012, 03:23:44 PM »
Have an existing problem in lower power below 1900rpm ( until turbo kicks in) and have been advised it could be stuck vanes/waste gate on turbo.  Was advised it would be ok to drive until fixed.  Otherwise car drives normally and has been regularly serviced ... 80,000 miles.

Am now in France. Twice now in the space of a week the engine suddenly loses all power and drops to idle and the accelerator just does nothing.  Engine just sits there idling. Switch off, wait around 5 mins and the engine restarts ok. (Big Phew as first time was on French motorway).  Engine management light (which I understand is the glow plug light) does NOT come on except as normal for a few seconds when you initially switch on. The first time I got a message in the central display 'Engine Workshop', the second time today, nothing.  Once restarted, the car drives ok, no problem.

I think I understand that 'something' has happened that has caused the ECU to shut down the engine to protect it. Fair enough. 

My question is .... (finally) .... If the engine is restarting and resuming ok, am I going to do any potential damage just carrying on ( I only really want to throw myself on the mercy of a French garage unless I really have to). And if there is no EM light showing, how long should it take the ECU to reset .... it seemed to take longer the second time.

Any light anyone can throw on this would be gratefully accepted. Kind regards.

Offline Mirez

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Re: No power, Accelerator stopped working -then resets
« Reply #1 on: September 01, 2012, 05:22:31 PM »
Hi and welcome to the forum!

Accelerator doing nothing is the key to your problem here, if it was sticking vanes or a turbo issue the throttle would still rev. I would suspect that the pedal itself is the cause of your issue, they have a habbit of collecting dust and debris which confuses the ECU. The more technical explanation is: There are two electrical varistor ladders in the pedal mech (a sliding resistance scale/wiper type mech) which the ECU uses to determine the position the pedal is in. During normal operation then these two ladders read virtually identical however if dust and debris gets inside then a difference can creep in between the two. The ECU interprets this difference as a faulty pedal and will stop acknowledging it - hence just idle.

Normally, this condition has a certain position on the pedal (like 90% pressed) where the issue occurs so if it is this, then you might be able to identify it and avoid causing the problem on the way back. Again, IF its this issue then you won't do much in the way of additional damage although its obviously not ideal. How long it takes the ECU to reset depends on how long it takes for the pedal values to be seen as "normal" again.

The good news is that you can strip the pedal apart and clean the contacts which should resolve it without the need for anything expensive or a French mechanic!!! ;)
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
14 VW Tiguan 2.0 TDI 177 AWD R-Line in Deep Black Pearl
With panoramic sunroof, bi-xenon headlights remapped at 205bhp.
08 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)

VCDS HEX/CAN - Scans/Coding done in Wiltshire in exchange for winegums! :)

Offline johnsimpson64

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  • Model: Galaxy Mk2
  • Spec: 2002 1.9tdi Ghia
Re: No power, Accelerator stopped working -then resets
« Reply #2 on: September 01, 2012, 05:45:26 PM »
Hi and welcome to the forum!

Accelerator doing nothing is the key to your problem here, if it was sticking vanes or a turbo issue the throttle would still rev. I would suspect that the pedal itself is the cause of your issue, they have a habbit of collecting dust and debris which confuses the ECU.

The good news is that you can strip the pedal apart and clean the contacts which should resolve it without the need for anything expensive or a French mechanic!!! ;)

Mirez, firstly many thanks for the prompt and very full reply. Much appreciated.  Now, whilst I used to take Ford Anglia engines out and fiddle with them over a weekend just for fun, that was around 45 years ago and I'd not now describe myself as a mechanic by ANY stretch of the imagination. :-)

Your observation re pedal position rings true as the first time I was cruising around 80mph in 6th on the motorway and the second at around 60ish in 5th on an N road.  Both around 2300 rpm which is what I tend to run at for hundreds and hundreds and hundreds of miles at over here.

Back in the old days, I was also an electronics engineer and remember potentiometers getting dirty and we used to work them back and forth over the trouble spot to 'clean' them. Alternatively we had some 'pot lube' we used to squirt in to help matters along. Without getting into the 'dismantling' scenario have you a view on either of those?  The other thing that struck me .... would this show up as a fault code if I did take it to a Ford garage that could read the ECU (is it called a Vagcom?).  This might confirm the diagnosis maybe (and could give at least a piece of mind for the 1200 mile drive back home lol). 

Many thanks again.  By the way, good site. The 'other' Ford Galaxy users site haven't even decided if they're going to let me join their merry band or not yet!  :-)

Offline Mirez

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  • Region: South West
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Re: No power, Accelerator stopped working -then resets
« Reply #3 on: September 01, 2012, 05:57:15 PM »
You are very welcome and yes, they have an interesting registration system - not at all geared to helping resolve pressing issues lol

Exercising the wiper can help, but normally only if its right near the top where its seldom used, low down the band its unlikely to help as this get's worked every time you use the car. I haven't had a need to strip one down recently but a lube/cleaner such as WD40 might be helpful if you can get some in and onto the track's.

Vagcom is a program for enthusiasts (I think Ford dealers use VAS-TECH or something like that), but yes it should definitely have logged a fault code and they'll be able to read it for you - that said, VW/SEAT would probably be the preference to head to as its all VAG group parts on the Galaxy.

Good luck!
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
14 VW Tiguan 2.0 TDI 177 AWD R-Line in Deep Black Pearl
With panoramic sunroof, bi-xenon headlights remapped at 205bhp.
08 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)

VCDS HEX/CAN - Scans/Coding done in Wiltshire in exchange for winegums! :)

Offline johnsimpson64

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  • Model: Galaxy Mk2
  • Spec: 2002 1.9tdi Ghia
Re: No power, Accelerator stopped working -then resets
« Reply #4 on: September 05, 2012, 07:51:43 PM »
Mirez .... just an update. Fault has reoccured again. Managed via the RAC to get a local Main Ford Dealer here in Languedoc to connect the computer and take a look (the French have just come off their summer holidays and all want their cars serviced it seems! So it was a struggle.).

Anyway, the outcome is that you were dead right. It is the accelerator unit faulty. He is trying to get a new one down from Paris by Friday so that he can fit before we set out on Saturday to return to blighty. Fingers crossed otherwise it's going to be a stop-start sort of 1000 miles :-)

Many thanks to this Forum and you again. And the 'other one' STILL hasn't even sent a note accepting me. LOL.

Offline Mirez

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  • Model: Galaxy Mk2
  • Spec: 03 115PS Ghia
  • First Name: Mark
  • Region: South West
  • Country: United Kingdom
Re: No power, Accelerator stopped working -then resets
« Reply #5 on: September 05, 2012, 08:00:00 PM »
Blimey let's hope it arrives - it'll be a long old trip else! Good luck and thanks for the feedback ;)
03 Ford Galaxy 1.9 TDI 115 Ghia in Spruce Green Metallic
With cream leather interior, Full Bodykit, Remapped at 145bhp, Lowered on 18's
14 VW Tiguan 2.0 TDI 177 AWD R-Line in Deep Black Pearl
With panoramic sunroof, bi-xenon headlights remapped at 205bhp.
08 Ford Transit 2.2 TDI 115 in Frozen White
With retrofitted everything except another slidey door! :)

VCDS HEX/CAN - Scans/Coding done in Wiltshire in exchange for winegums! :)

Offline johnsimpson64

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  • Model: Galaxy Mk2
  • Spec: 2002 1.9tdi Ghia
Re: No power, Accelerator stopped working -then resets
« Reply #6 on: July 02, 2013, 08:26:06 PM »
Well, here we are in June 2013 .... you just know what I'm going to say!

So, we did the 1200 mile return trip from France in Sept 2012 and guess what .... never failed once.  Spoke to our local garage who advised "see if it happens again and if so we'll change the throttle sensor unit."

Never happened again. Until June 2013. Did it twice within 1 hour, exactly the same, switch off, wait 3-4 mins, restart ok.

Garage could see fault code relating to sensor. Put it in for new sensor.  A week later, did it again, once.  Hasn't ( so far) done it again.

Now, this is a huge long shot ..... Down in France it was pretty hot. Coming back to UK was cool. Then winter.  Then early-mid June here it just got hotter ( briefly!)

Can there be ANYTHING apart from the Throttle sensor that could cause this (and be sensitive to hot ambient temp)?

Offline johnsimpson64

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Re: No power, Accelerator stopped working -then resets
« Reply #7 on: July 02, 2013, 08:36:44 PM »
Sorry, forgot to say ... Man in France couldn't get hold of a Throttle Sensor unit anywhere in France. RAC manfully said they'd get one in UK and fly it out ( quite impressed with that) but at the end of the day couldn't sort it out before we were due to return.

Offline SilverBeast

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Re: No power, Accelerator stopped working -then resets
« Reply #8 on: July 02, 2013, 08:36:59 PM »
It could also be the wiring to the sensor as that would show the same fault.  If it has happened with the new sensor then the garage should be able to read the same fault again.  This could indicate another faulty sensor (probably unlikely though), faulty wiring (more likely) or a faulty ECU (possible but unlikely).

 

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