Hi guys.

 

I have noticed that my Skoda Octavia VRS TDI MK3 (2014) has a slight hesitation when depressing the accelerator.

 

After much reading, i want to try and clean the Throttle body. I don't fancy a huge garage bill for something i could possibly do myself.

 

Just wanted to know, does my car have a Throttle body? If so, is it easy to remove/clean?

 

I had a look around the forum for information and found some engine diagrams, but could not find a reference to the Throttle body. Or is it known as a Throttle valve? Not sure if i am searching correctly?

 

Please can someone provide tips/diagrams and instructions?

 

Any help greatly appreciated.

 

Thank you.

 

 

Diesels don't have throttle bodies. They are governed by the fuel supply to the cylinders. They also usually have more air supply than is needed so when you add more fuel the oxygen is there to make more power. That's why it's traditionally more common to find turbos on diesels rather than petrols (not so much now due to the extra power they offer).

 

To solve your problem you will benefit from a pedal box from the likes of dtuk (others available). They are tuneable and make a good job of eliminating the dead spot at the start of the pedal travel. Should be declared to insurance company and possible they won't charge aside from change of details fee.

Thank you MarkyG82

 

So Diesels do not come with Throttle body, that explains why i was not able to find it.

 

I'm not a big fan of Insurance companies, so i think i'll give Pedal box a miss, and just learn to live with the dead spot. Just hope it doesn't morph into something more serious later.

 

Great info, appreciate your reply.

 

Cheers

 

😉

If you have vcds or obdeleven (or can borrow one) there are a couple of mods you can do. Search Audi throttle mod and steering mod. Makes a bit of difference but not as much as the pedal box.

15 hours ago, cardy said:

Hi guys.

 

I have noticed that my Skoda Octavia VRS TDI MK3 (2014) has a slight hesitation when depressing the accelerator.

 

After much reading, i want to try and clean the Throttle body. I don't fancy a huge garage bill for something i could possibly do myself.

 

Just wanted to know, does my car have a Throttle body? If so, is it easy to remove/clean?

 

I had a look around the forum for information and found some engine diagrams, but could not find a reference to the Throttle body. Or is it known as a Throttle valve? Not sure if i am searching correctly?

 

Please can someone provide tips/diagrams and instructions?

 

Any help greatly appreciated.

 

Thank you.

 

 

 

Yes, throttle valve is the same thing.

Modern diesels do have one.

At the point of air entry into the inlet manifold, item 14 here https://skoda.7zap.com/en/cz/octavia/oct/2014-753/1/129-129080/ confusingly named 'controller lid' for reasons unknown to me.

@Wino I'm now confused. You are right but I'm trying to understand the function it offers in a diesel. Is it used in conjunction with the turbo system to control the air through the head (as per a petrol) or is it slightly different? As a traditional TB would work alongside the fuel system this setup must be just for air alone?

If it’s the same as a mk ii then it is for air but it also carries recirculated fumes and gets  full of crap From the fumes. No mention of this in any service schedule but if you look on YouTube you can see what it look like. 

Yep, purpose is to artificially lower the pressure after it to controlled levels to encourage recirculated exhaust gases to blend with the fresh air and thus reduce NOx emissions.

Secondarily, it shuts completely at switch off to give a nice, non-juddery shutdown.

So it seems like the OP could be onto something. Does it need any sort of maintenance and/or would it benefit from a clean?

17 hours ago, MarkyG82 said:

So it seems like the OP could be onto something. Does it need any sort of maintenance and/or would it benefit from a clean?

 

As mar-mite says above, on the previous engine, the EGR used to discharge its filth just above the throttle valve.

The crud from the EGR used to run down the inlet tract & foul up the throttle valve causing it to stick.

 

Looking at the new engine diagram supplied by Wino, the throttle valve ( 14 ) & EGR valve ( 19 ) are now totally independent of one another, so I can't see there being the same problem.

 

But as seems to be common on most EGR valves, they usually get blocked & fouled up eventually causing various problems with running & the DPF.

 

I would suggest if it's reasonably easy, have a look at the EGR valve & give that a good clean making sure nothing is sticking.

 

As an aside, the throttle valve also limits air flow during a regen to keep the temperature as high as possible.

I could not believe the amount of crud in mine reducing the bore by at least 10 mm (5mm thick all round) 

the performance after was well worth it. 

Hi guys.

 

I most definitely want to try and clean the EGR valve. If there any instructions/diagrams on 'how to' it would be great. I will also take a look around the forum.

 

I am worried that the dead spot may turn out to be something more serious, so will be looking at EGR valve for sure.

 

Really appreciate the valuable information discussed so far.

 

Thanks guys.