Anyone experienced a flat spot at 1000 - 1500rpm (ish) on a very light throttle, it almost feels like the brake has been dabbed for a second before normal service is resumed.

 

The car has not had the fix and was apparent pre-remap too. 

 

A fairly strong Archoil mix and a few weeks of driving in divers boots has had no effect.

 

I'm thinking perhaps some of the teeth in the throttle body may be broken or worn, the parts are sub-£15 - has anyone tried this? 

 

 

 

 

Hi have the same symptoms but only notice when travelling down hill with light pressure on the throttle. Not all the time

I ran my Yeti for 37K and never noticed this. The torque seemed to kick in at about 1700/1900 rpm so I can see why just below this things could seem a bit flat.

 

Colin

 

10 hours ago, b1ackb1rd said:

 

 

I'm thinking perhaps some of the teeth in the throttle body may be broken or worn, the parts are sub-£15 - has anyone tried this? 

 

 

I'm pretty sure if it was an issue with the EGR you would have EML on and have codes stored as its emissions related. 

 

8 hours ago, Rich71 said:

Hi have the same symptoms but only notice when travelling down hill with light pressure on the throttle. Not all the time

 

Its pretty normal to feel this sometimes, at part throttle the car really ramps up the EGR. Is it a 2.0 150 by any chance?

 

Edited 15 August, 20205 yr by SuperbTWM

17 minutes ago, SuperbTWM said:

 

I'm pretty sure if it was an issue with the EGR you would have EML on and have codes stored as its emissions related. 

 

 

Its pretty normal to feel this sometimes, at part throttle the car really ramps up the EGR. Is it a 2.0 150 by any chance?

 

No its a 2.0 110

I've had 6 or 7 VAG 1.9 and 2.0 tdi engines in the last few years and this is new to me, the throttle on all has been linear even when I've had mad remaps and this is why I think there's a breakage somewhere. 

 

Throttle body has been cleaned, and the mixer turned 180 degrees but this has not made any difference. 

 

The video is very clear, so for the sake of £15 I'm going to give it a whirl at my first opportunity - can't do any harm?

1 hour ago, b1ackb1rd said:

The video is very clear, so for the sake of £15 I'm going to give it a whirl at my first opportunity - can't do any harm?

 

Why don't you just strip it down and inspect first? You can do that for free. Just don't break it or it will cost you a lot more than £15 

 

Also, are you aware that this 'throttle body' has nothing to do with the throttle pedal, like it would be on a petrol engine.

Edited 15 August, 20205 yr by SuperbTWM

39 minutes ago, SuperbTWM said:

 

Why don't you just strip it down and inspect first? You can do that for free. Just don't break it or it will cost you a lot more than £15 

 

Also, are you aware that this 'throttle body' has nothing to do with the throttle pedal, like it would be on a petrol engine.

 

As well as the hesitation, I also have have variable idling, revs don't drop that quickly and what feels like horrendous turbo lag - I'm going to go for it ! 

 

Besides ... it's ordered

Let us know what you find 🙂

What does the throttle body do and does it have any functionregarding stopping the engine when the ignition is turned off?

 

My Yeti 2.0 CR engine recently started shuddering when I switch off, I immediately thought it was the DMF starting to fail but its not the same sort of trying to shear the engine mounts shake that I had when I did have a DMF failing, it does not do it at all when the engine is cold and it almost seems like a running on effect, the engine takes a little longer I think to stop and it does not do so smoothly.

 

If its not this butterfly valve what else could it be?

 

I also have crap MPG but maybe thats normal for brick with 4wd transmission.

Two distinct functions that I'm aware of @J.R.;

Helping the engine to shut down cleanly by stopping the incoming airflow.

Balancing pressures by restricting* incoming airflow - in certain operating conditions - to enable higher EGR flow rates than would otherwise be possible.

 

*Or perhaps just spatially rearranging, to create local low(er) pressure near/at EGR entry point. Probably amounts to the same thing.

Edited 16 August, 20205 yr by Wino

11 hours ago, Wino said:

Two distinct functions that I'm aware of @J.R.;

Helping the engine to shut down cleanly by stopping the incoming airflow.

Balancing pressures by restricting* incoming airflow - in certain operating conditions - to enable higher EGR flow rates than would otherwise be possible.

 

*Or perhaps just spatially rearranging, to create local low(er) pressure near/at EGR entry point. Probably amounts to the same thing.

On some of the more recent Euro 6 engines You have 2 Valves.
 

you have the throttle valve mentioned above creating a negative pressure on the intake to promote EGR flow and you also have the same set up on the exhaust making the exhaust pressure on the outlet of the turbo higher than it would otherwise be to get even more EGR flow.