Forget the brake switch and injector loom. My car has just lost throttle response momentarily and then kicked back in again so fault is obviously still present. No warning lights on the dash or fault codes. Back to the drawing board. 

Quick update with my occasional loss of throttle pedal on my 2009 Octavia 2 ltr BKD. No codes are being left when the vehicle temporarily loses it's throttle. Feels just as if the throttle cable, if it had one had just snapped. It usually kicks back in but I feel that this is a dangerous fault especially when pulling away from junctions. To date I've changed the throttle pedal, brake pedal under servo switch, fuel injector/glow plug wiring loom, all the glow plugs whilst easily accessible and the ECU. The fault is still with me. Has anyone else got this or had this problem? 

Clutching at straws (pun intended) there is a switch on the clutch pedal too. I Believe it is used to reduce maximum revs during gear changes as well as the obvious one of requiring you to press the clutch pedal during starting. Just a long shot but worth checking for loose or damaged wiring.

Cheers. I'll check that out whilst having another check through the loom, connections and earth points. 

After that my next move was to change the whole engine loom. After that I was going to run a separate 5 volt supply to the throttle pedal switch once finding a suitable feed. 

Edited 1 May, 20215 yr by Moorside

I don't know what to suggest really. Replacing whole engine loom sounds a big job speculatively.  Is there some live data monitoring within VCDS or dealer grade diagnostics that could help.  Like throttle load, throttle position etc.  If you monitor what does it show when there is no throttle response?

Hi. There are absolutely no codes stored whatsoever even when using dealer spec diagnostic equipment. They take the car out for a 45 minutes test drive and the fault doesn't occur. A couple of days later it will then fault just for an instant with no dash warning lights and again no stored codes. I may have to look at a live data OBD dongle. I already have a good known engine loom to try. 

Any thoughts as to a direct switch 5 volt supply to the throttle pedal? 

Did anyone ever find the solution to the issue with no throttle respponse bkd 2.0 tdi 2008 cheers 

After changing the ecu, injector loom, air flow meter, a couple of weak injectors, throttle switch under the servo, throttle body & egr valve, various engine sensors and had an auto electrician run a continuation check he suggested changing the whole throttle pedal /switch even though no fault was showing. To my surprise TPS had this in stock as it apparently is a known fault. One brand new throttle pedal /switch from Skoda  (not a pattern part) and I've had no problems since. 

7 hours ago, Moorside said:

After changing the ecu, injector loom, air flow meter, a couple of weak injectors, throttle switch under the servo, throttle body & egr valve, various engine sensors and had an auto electrician run a continuation check he suggested changing the whole throttle pedal /switch even though no fault was showing. To my surprise TPS had this in stock as it apparently is a known fault. One brand new throttle pedal /switch from Skoda  (not a pattern part) and I've had no problems since. 

do you have the part number by any chance?

In typical VAG group fashion a couple of throttle pedals were listed. I just gave TPS my registration number. I imagine that if you did the same with your local motor factors they would be able to supply you with the correct one. Be sure that it's a quality Bosch item or similar and not some £40 piece of rubbish. Also don't make the mistake of getting a second hand one as I did because for some reason that didn't cure the problem. A brand new one did so I can only assume that the second hand one was also faulty. I was also told that the very latest brand new version is more reliable. For the sake of £70 ish it's the best option.