My 2015 Yeti 1200 has an irritating flat spot/misfire at 2000rpm when working hard in  any gear.  Any thoughts?

Welcome.

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How many miles has it done and what servicing.

Has it had the air filter changed & the spark plugs, or at least looked at?

Spark plug lead no3?

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Is that still an issue with a 2015 1.2TSI?   Worth checking as a TPI should cover it if it is.

2 hours ago, Roottootemoot said:

Welcome.

?

How many miles has it done and what servicing.

Has it had the air filter changed & the spark plugs, or at least looked at?

 

49,000 miles - air filter supposedly changed at last regular service - but I shall now look at it myself!

I queried spark plugs at last service and had new set in car for them to fit - but they said diagnostics suggested plugs OK - so they didn't touch them - my only thought is, even if plugs well worn - why so engine speed specific? My thoughts being sort of thinking along maybe some secondary throttle beginning to open .......

1 hour ago, Urrell said:

Spark plug lead no3?

What should I look for - service was done by local garage not Skoda dealer - was there an issue with one specific spark plug lead?

If you had a Main Dealer Service then the Manufacturers Guidelines are 2nd major service spark plug replacement and the Major Service cost includes spark plugs.

 

Because no Misfire codes that is not a reason to not change spark plugs at 40,000 miles.

 

EDIT, i was typing as you said a local garage.

The plug lead 3 is about the armour guard. I thought by 2015 that was changed to the correct ones. I might be wrong.

 

The other issue is a Turbo Accuator.

Edited 21 December, 20196 yr by Roottootemoot

So spark plugs need checked for the gap.

If removing them as well to replace them.

Have got the new plugs - so will now change them! thanks for that info - I was brought up on motorcycles (British) so was very used to looking after the sparks!!!!

 

The voltage needed to fire a plug rises as the cylinder pressure rises, so more volts needed under load (open throttle, turbo boosting).  The voltage needed also rises as the electrode gap increases due to erosion (mileage) and electrode rounding (also mileage). So a plug change would be the first thing I would do if I had a misfire. 

 

As for looking at diagnostics to see if they need changing, that's a new one on me.  Sounds like a lot of faith being put into fault codes.  In the old days plugs were changed at 10,000 miles.  I know they have fancy expensive metal in them nowadays, but expecting more than 40,000 miles is stretching it.