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First of all, I highly suggest you to completely remove the throttle body from the intake manifold and clean it also from the other side, because it's where it gets more dirty. Second, remove both MAP sensors and clean them with proper spray cleaner. Third, those spark plug's cables look very bad. On this specific engine they use to easily get oxydated as well as the ignition coil. Replace all of them too with good-brand parts (ie. NGK first of all). Fourth, if all of the above don't fix the "high rev" problem, look for the clutch pedal position sensor. If the car has Start&Stop function, it is integrated in the clutch pedal master cylinder and you have to replace it and to properly bleed the clutch hydraulic system. Instead, if the car doesn't have the Start&stop function, the sensor is located behind the clutch pedal and it is independently replacable. BTW, you're really close to have this engine running perfectly. Don't give up. :)

Top video thanks for sharing 👍

Massive progress buddy. Your so close. Keep it coming. The cars looking great. Good on you buddy.

Make sure the A/C is not turned on... My Skoda Roomster 1.2 TSi CBZB has "redlight start-stop function"... I sometimes stop at a redlight with A/C being not turned on... and then start-stop-function (whenever the battery has high Ah-output) is working. Then I ask my wife - for fun - to turn up the A/C... (me not tuching pedals or the stearing) which then starts the engine... that make my wife a bit worried ... hi hi... ho ho... back to rpm-fluctuations... also when my A/C is on auto, then need for xtra Ah to the A/C-motor will make the engine run up the rpm to facilitate the xtra supply of electricity... by the way I am just whatching your videos because I currently is changing the chains as seen in your earlier videos... thx for showing so we all can be smarter.

Have you ever been so tired that ive commented on the wrong video.. this video though is great, You've done so well to do the chain, and fox the crankshaft sensor wiring and hopefully it will be the end of the issues!

I would have changed the plug leads but you are doing a great job

Great video mate I am from Caerphilly

Well done, mate. I'm sure you will sort the gremlins out and change your petrol filter. Check the throtel cable also when you have used cleaner on throttle body. This can affect performance before throwing money at it. Check cable carb linkages and cable

I entered last time for S1. And I entered again. Better luck this time Fingers crossed.

Good 👍

Instead of those crimping connectors, I'd advise you use the solder sleeves - Salvage Rebuilds UK have started using them with great results

My transit does something similar in my case it’s an anti stall - and normal to hold the revs up when clutch is pressed

You should of got the ngk plugs iridium plugs mate they last much longer but nothing wrong eith bosch I have the same exact engine in my skoda rapid

Just a thought I have and Audi A3 and I noticed that when you put it into gear the tick over goes up to about 1100, take you foot off the clutch and it drops back to 900. I don't think that is your problem as yours fluctuates, I think that mine is so that you don't stall the car at low revs? Vacuum leak seems like the first place to start though!

I have this same engine in my seat ibiza just done spark plugs are a nightmare they was quite white on the tips unsure why, got a few oil leaks and a dodgy crankcase breather like yours seems common , and also had a boost and oil leak from the pressure pipe that goes from turbo to throttle body the seal was knackered on the pipe at throttle body end , still got a missfire / little jump at idle , not had the car long and starting to fall out with this engine dont seem very good !

Rev bump when you release the clutch is normal on vw audi cars, throttle sticking is your best bet next.

Could be a worn thottle body, sticking slightly. good luck with it mate.

If I remember correctly you need to be really careful and gentle when cleaning the throttle body. Those butterfly wings are sensitive to being pushed back. Perhaps they are not correct now? Maybe a new throttle body and vcds relearn is needed?

Think your right on vac leak as when car running you can hear a vac leak not sure if its just the mic .. recheck the pcv valve is in right an hose aint cracked

Was that your lad doing the voice over the for new raffle ?

When's your lad going to make a start on the Polo?

Unplug maf mate see if it makes a difference or improves

Whay is the engine code of thst engine butt ? I got same engine in my skoda I know they changed the engine as it had timing problems I have the new revised one that is much better and no issues I think u may have the older style thstbhad teh problems maybe

Engine startup doesn't sound good. There's a suspicious whistle and rought start. Also, the engine might have a slight misfire. These engines did have misfiring issues. Just plug in an OBD scanner. You'll get some good information and erase old codes that might be messing with the throttle. And NEVER do again what you did to the throttle body. These are not your oldschool analogue stuff. These electronic ones are sensitive. Remove it and handle it with outmost care and clean it. It's full of junk for sure.