MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: cmdrfire on June 01, 2010, 10:50:18 am

Title: No response to throttle! :O
Post by: cmdrfire on June 01, 2010, 10:50:18 am
Was driving to work today. On the A30, 50mph, driving in manual mode, 4th gear, 3kRPM or so. Car starts slowing. Apply more throttle, nothing happens, I start to get a little worried. Hit the paddle and drop down a gear... gearchange occurs, but still no response to throttle. Warning indicators on, get ready to pull over, car behind still a little way away so drop into second. Again gearchange occurs but no response to throttle. Pull over onto the side of the road, mount the kerb, gear automatically drops into first. I put the car into Neutral and try throttle... and there's a blip. To be safe I turn the car off, and then on again, and gingerly get back on the road. No problem for the rest of the drive.

I drove 250 miles on the weekend with no problem :S so this is a bit disturbing. And it's not like the only other time I lost drive, with flashing PRNDS, then it was like the car was in neutral and the accelerator pedal still responded. That was resolved as a faulty tiptronic switch, more than a year ago.


Anecdotal: the most recent map I've loaded from Superchips causes a funny startup. The engine starts, revs to around 900RPM and then dips, seems like it's going to stall, and then picks up again to the normal 1100 RPM-ish. Yesterday the car actually failed to start twice. When I restarted the car after each occasion, a blip of the throttle was required. Also last week I've been having very minor stutters throughout most of the week, a bit like a throttle surge, particularly so when changing gears. But over the weekend, nothing, perfect performance except for the start.

Thoughts?
Title: Re: No response to throttle! :O
Post by: animal on June 01, 2010, 11:07:52 am
VCDS scan would be my first port of call.
Title: Re: No response to throttle! :O
Post by: Poverty on June 01, 2010, 11:14:31 am
throttle body could be playing up.

Any lights on dash?
Title: Re: No response to throttle! :O
Post by: Janner_Sy on June 01, 2010, 11:25:24 am
Anecdotal: the most recent map I've loaded from Superchips causes a funny startup. The engine starts, revs to around 900RPM and then dips, seems like it's going to stall, and then picks up again to the normal 1100 RPM-ish.
my car has always ticked over at about 900rpm.  1100rpm is surely on the high side
Title: Re: No response to throttle! :O
Post by: S2 Ant on June 01, 2010, 11:36:28 am
Agreed, mine always idles under 1k, the norm is prob around 900rpm, prob says in the tech specs part of the manual somewhere.
Title: Re: No response to throttle! :O
Post by: Janner_Sy on June 01, 2010, 11:40:10 am
its almost like its running on choke,

On a cold day my car will sit at 1100rpm until it has heated the oils etc up, and then it will drop to 900rpm again.  usually takes about a minute
Title: Re: No response to throttle! :O
Post by: cmdrfire on June 01, 2010, 11:45:02 am
Will see if I can bother Hedge again and go get it scanned. Problem is extremely intermittent which will make diagnosing a bit of a tricky one.

throttle body could be playing up.

Any lights on dash?

No lights. Did give a thought to throttle body reset but haven't done so yet.

my car has always ticked over at about 900rpm.  1100rpm is surely on the high side

900RPM once warm, starting from cold it (used to) sit at 1100RPM... almost always done that. Should've specified that in the OP. Even so, it feels like it's almost going to stall following startup, until the engine "catches" properly - and as I say did stall yesterday, twice, requiring a blip of the throttle on restart.
Superchips have advised me to put it back on original map for a few days and test... will try that.
Title: Re: No response to throttle! :O
Post by: animal on June 01, 2010, 12:15:35 pm
Will see if I can bother Hedge again and go get it scanned. Problem is extremely intermittent which will make diagnosing a bit of a tricky one.

throttle body could be playing up.

Any lights on dash?

No lights. Did give a thought to throttle body reset but haven't done so yet.

my car has always ticked over at about 900rpm.  1100rpm is surely on the high side

900RPM once warm, starting from cold it (used to) sit at 1100RPM... almost always done that. Should've specified that in the OP. Even so, it feels like it's almost going to stall following startup, until the engine "catches" properly - and as I say did stall yesterday, twice, requiring a blip of the throttle on restart.
Superchips have advised me to put it back on original map for a few days and test... will try that.

If something is wrong, a fault code should have been logged regardless as to whether you can recreate the fault.

I didn't think it was possibly to stall an Auto?
Title: Re: No response to throttle! :O
Post by: Sparky Craig on June 01, 2010, 12:19:08 pm
If you do get Hedge to have a look make sure he`s not got his screwdriver with him.  :fighting:
Title: Re: No response to throttle! :O
Post by: Saint Steve on June 01, 2010, 12:20:53 pm
If you do get Hedge to have a look make sure he`s not got his screwdriver with him.  :fighting:
:sad1:
Title: Re: No response to throttle! :O
Post by: cmdrfire on June 01, 2010, 01:01:16 pm

If something is wrong, a fault code should have been logged regardless as to whether you can recreate the fault.

I didn't think it was possibly to stall an Auto?

Didn't think it was possible either  :scared:
Anyway, OEM map now installed, so fault codes reset I presume (shoulda thought of that before I started the reflash but wanted a functioning car)... let's see what happens.
Title: Re: No response to throttle! :O
Post by: Poppa Dom on June 01, 2010, 01:12:25 pm
Neo - I am closer to you than Hedge for a scan if you need it (Bracknell).

Dom
Title: Re: No response to throttle! :O
Post by: cmdrfire on June 01, 2010, 01:14:26 pm
Neo - I am closer to you than Hedge for a scan if you need it (Bracknell).

Dom

Cheers dude. Hedge is just down the road a bit from where I work, but if I can't get to him I'll let you know.

Just gonna go out and take the car for a little drive - will report back when I, er, get back.
Title: Re: No response to throttle! :O
Post by: john_o on June 01, 2010, 01:17:23 pm
have a look around the throttle pedal wires. sounds a bit like throttle pedal gone awol.
theres some vcds checking you can do on it , theres 2 values , 1 goes up the other goes down  :happy2: (they work in tandem)

http://wiki.ross-tech.com/wiki/index.php/00670


related or not the car should always start first time  :happy2:

Title: Re: No response to throttle! :O
Post by: cmdrfire on June 01, 2010, 09:44:49 pm
Well, on the stock map now, starts seem fine, will see how it goes tomorrow. Will be at JKM so I might ask them to take a quick look, see if anything's wrong. The drive home was also alright... for some reason (possibly psychosomatic) the car just seems more "solid" on the stock map. Most peculiar.
Title: Re: No response to throttle! :O
Post by: cmdrfire on June 03, 2010, 10:25:38 am
Update to this:
Was at JKM yesterday. Somewhat typically, car displayed absolutely no problems at all driving home from work on Tuesday and going to JKM, then to London, and then home yesterday.

Today on the drive to work, stutter stutter.

Conclusion? Car doesn't like going to work.

Definitely starting to sound like some sort of sensor issue. Must get it VCDS'd at the Jekyll and Hyde meet next week.
Title: Re: No response to throttle! :O
Post by: cmdrfire on June 11, 2010, 10:16:24 pm
So DomT was kind enough to VCDS my car at the J&H meet. This is what he found:
Address 01: Engine        Labels: 06F-907-115-AXX.lbl
   Part No SW: 1K0 907 115 A    HW:           
   Component: 2.0l R4/4V TFSI G00 0070
   Revision: --H01---    Serial number: VWZ7Z0D1164430
   Coding: 040300031C070160
   Shop #: WSC 00004 210 87564

1 Fault Found:
004195 - Fuel Pressure Regulation: Control Range Not Reached
               P1063 - 002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 0
                    Fault Frequency: 5
                    Mileage: 161826 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 09:39:43

             Freeze Frame:
                    RPM: 3003 /min
                    Load: 28.6 %
                    Speed: 120.0 km/h
                    Temperature: 66.0°C
                    Temperature: 19.0°C
                    Absolute Pres.: 980.0 mbar
                    Voltage: 14.224 V

Readiness: 0000 0001

No other errors.
Ross-Tech wiki does not contain this error. Googling is not too helpful; someone on a 2.7TDI Audi reported this issue but was resolved by regenerating the DPF. Not really applicable for my case.
The only other thing I found was on a guide to errors in an Audi A2 1.6:
http://vwforum.vwforum.ro/index.php?act=attach&type=post&id=178112
As likely causes, this is what it says:
Air in fuel system, fuel system leak, fuel lift pump, fuel bypass valve, fuel pressure control valve, high pressure fuel pump.

Air in fuel system or fuel system leak seems unlikely to me.
Possibly some more VCDS logging is required; anyone have any further thoughts what it might be? JKM checked out my cam follower and said it looked fine. I presume the HPFP is running alright; I'm on my stock map right now and this occurs.
Title: Re: No response to throttle! :O
Post by: chungster on June 11, 2010, 10:18:46 pm
isn't that the same error code as the person who broke down on the ring trip at start of may???

Title: Re: No response to throttle! :O
Post by: Poppa Dom on June 11, 2010, 10:21:07 pm
I'd do some live road logging of fuelling related blocks as the next course of action. Worth giving Keith at JKM a call too?
Title: Re: No response to throttle! :O
Post by: cmdrfire on June 11, 2010, 10:23:00 pm
isn't that the same error code as the person who broke down on the ring trip at start of may???



Eeek, that's a bit scary  :surprised: I'm scouring that thread now.
I'll give Keith at JKM a call on Monday... as for tomorrow I'm going to go to Paris and drive back Sunday  :chicken: too late for me to back out of that now!

Edit: some digging around, that Nurburgring car has a different fault:

We have a car on our ring trip running this fault: -

16471/P0087/000135 - Fuel Rail/System Pressure: Too Low

It's pulling back the power above 4000rpm at higher speed.

Any ideas??

A quick bit of logging following the guide on Ross Tech wiki shows the requested pressure isn't being meet about 4k rpm by upto 10bar.

Mine is an intermittent problem, and it's noticeable at lower RPMs when I request more power. So possible the HPFP isn't keep up... might need to trouble you later in the week Dom if it's alright.
Title: Re: No response to throttle! :O
Post by: SteveP on June 11, 2010, 10:35:14 pm
That is a very similar error Marks car that occurred on route to the ring.

I would agree with Dom some more logging is needed staring with LP side of the fuel system.
Title: Re: No response to throttle! :O
Post by: Poppa Dom on June 11, 2010, 10:38:44 pm
No worries Neo, though I am up in Manchester until Wed.
Title: Re: No response to throttle! :O
Post by: kufel on July 15, 2010, 10:08:42 pm
isn't that the same error code as the person who broke down on the ring trip at start of may???



Eeek, that's a bit scary  :surprised: I'm scouring that thread now.
I'll give Keith at JKM a call on Monday... as for tomorrow I'm going to go to Paris and drive back Sunday  :chicken: too late for me to back out of that now!

Edit: some digging around, that Nurburgring car has a different fault:

We have a car on our ring trip running this fault: -

16471/P0087/000135 - Fuel Rail/System Pressure: Too Low

It's pulling back the power above 4000rpm at higher speed.

Any ideas??

A quick bit of logging following the guide on Ross Tech wiki shows the requested pressure isn't being meet about 4k rpm by upto 10bar.

Mine is an intermittent problem, and it's noticeable at lower RPMs when I request more power. So possible the HPFP isn't keep up... might need to trouble you later in the week Dom if it's alright.





Hello,
I ve got exacly the same problem as Yours. Did You solve it?
Title: Re: No response to throttle! :O
Post by: cmdrfire on July 15, 2010, 10:22:53 pm
Er, yes, more or less.
I went to Hedge who made logs but she behaved herself and ran perfectly.
Next day she threw a fit and was almost undrivable, so I punished her and left her at VW.

Problem was either the fuel pressure switch or the cams, apparently. Since I'd had my cam follower checked by JKM just a couple thou miles before and that was OK I told them it was likely the fuel pressure switch and asked them to replace that. This was two weeks ago. Since then she's been running much, much better. Once a week or so in the morning she may hesitate but this seems to have solved the problem for now.

Hope that's of help!