C63 slow revs

[Jovie]

I have noticed that my C63 seems to rev slower sometimes for no apparent reason,
I thought it might be the wheel slip-slide or the mode it is in but i tried it when stationary and noticed that sometimes it revs up a bit slower as if maybe an air intake is blocked.
At other times if i blip the throttle it will fly past 3k revs and gives a mighty bark similar to a cold start but when its revving slowly it 'climbs' up the revs.
Thats the only way i can explain it.
Has anyone else experienced similar?

Normally it will happen once or twice and then return to normal.
Always filled with Shell optimax.
Happens when engine warmed.

 

[ACID]

what year?

 

[Jovie]

what year?

2012 coupe Performance pack.

 

[The _Don]

Why worry it's under warranty, let the dealer resolve the problem.

 

[def90cars]

The throttles are sensitive to when in D or R or P/N....
Mine will not always rev aggressively on throttle bl20example.
When you switch to reverse the throttle is twice as sensitive"ish".

ACID may have a map to over write that.

 

[Jovie]

Why worry it's under warranty, let the dealer resolve the problem.

Because most Dealers don't know S**T about anything, they have your car in and out forever changing everything and getting nowhere, then someone from a forum like this who has had a similar problem says-try this.

Forums tend to have more knowledgeable people.

 

[Ricky16]

Could it be a fuel issue my idles like crap sometimes bounces a little and then struggles a bit like yours I've but it down to not using shell all the time

 

[ScottBacon]

Whereas mine seems to run great on BP ultimate

 

[StephenSJason]

There's a bunch of M3 guys who have issues with V-Power Nitro who report the same issues.
I'll be honest, I'm quite new to capable NA engines but, I know that at least for my turbocharged lot that if they don't like something then timing will be retarded to protect the engine.

 

[PhilT]

I think its normally tbh, Mine sometimes revs more freely than others like its the loud peddle that seems to be more sensitive than others. I have read others say the same thing. I either thought it was a throttle issue like on my previous Audi S3 you could make it more/less sensitive with a throttle map or thought it was a cooling issue as all the facelift cars have cooling issues other than the black series.

If we can make the throttle pick up quicker instead of being a bit lazy I would love to know