hesitation at high RPM

Post by **bn8959** » Thu Feb 26, 2009 5:04 pm

Ah ok! Thanks for the info. I'll see what they say first - the receptionists dont seem to like me trying to tell them what to do! When I pick it up Ill try and talk to the tech and see what he says! But it sounds like just the same issue, "strange effects" indeed!

I wonder if that has anything to do with my my exhaust valves stay closed ALL the time - even in sport! (and no they are not stuck

unplugging pipes proves that)

Post by **PetrolDave** » Thu Feb 26, 2009 8:08 pm

bn8959 wrote:I'll see what they say first - the receptionists dont seem to like me trying to tell them what to do!

Most Audi receptionists (who know very little if anything about cars and almost certainly have never driven an RS)seem to think they are experts. Insist on talking to the Master Tech who worked on your RS.

Post by **pippyrips** » Thu Feb 26, 2009 9:17 pm

maybe not directly, but closed valves certainly won't help! It's the proverbial banana up the tail pipe!

Post by **bn8959** » Thu Feb 26, 2009 10:02 pm

pippyrips wrote:maybe not directly, but closed valves certainly won't help! It's the proverbial banana up the tail pipe!

I agree! I was testing with the exhaust valve pipes disconnected and therefore valves open

Same performance issues though

Post by **mac4RS** » Fri Feb 27, 2009 12:43 am

All I can explain the sensation as is like this... you put your foot down (100% throttle) in 4th or 5th and anywhere between 5k and 6k rpm it's like there's a strong gust of wind which hampers your progress,

(Sorry I missed this thread when I posted my 'Hesitant motor this evening')...

These symptoms are very similar to mine...

My motor has now done 29k with mixed driving.

Post by **bn8959** » Fri Feb 27, 2009 10:27 am

Do you know if you are on ECU version 0080 as well?

Post by **Covkiller** » Sat Feb 28, 2009 1:26 pm

I had a similar problem, ie, a flat spot at 4k to 5k revs, especially in 4th gear.
Listers Audi in Coventry replaced the engine and intake manifold under warranty.
Hey presto flat spot gone!

Post by **booski** » Sat Feb 28, 2009 2:16 pm

mmaric wrote:I had a similar problem, ie, a flat spot at 4k to 5k revs, especially in 4th gear.
Listers Audi in Coventry replaced the engine and intake manifold under warranty.
Hey presto flat spot gone!

You had a new engine?

Post by **Andyuk911** » Sat Feb 28, 2009 4:14 pm

I bet carbon build up on the valves and intake ....

Which petrol do you use ?

Post by **bn8959** » Mon Mar 02, 2009 4:57 pm

The thing is for me it happened with the software update, its not degraded over time - it was just rubbish after the update. I always use super plus - usually from Esso.

Post by **mac4RS** » Tue Mar 03, 2009 6:41 pm

Do you know if you are on ECU version 0080 as well?

Not sure, car booked for this Friday and will know then.

Having spoken to my local dealer, they feel it will be an Airflow or ECU problem but not the engine...

Post by **PetrolDave** » Wed Mar 04, 2009 9:25 am

Tell them to reset the basic settings on the engine ECUs... if they didn't do that after the 0080 update it will drive like a dog!

Post by **mac4RS** » Wed Mar 04, 2009 11:01 am

Tell them to reset the basic settings on the engine ECUs

Thanx Dave.

Post by **mac4RS** » Fri Mar 06, 2009 5:45 pm

I had the mobile Audi Tec guy (Mr Unhelpful) visit me today to diagnose my problem

Plugged his PC in...no faults recorded. He said it was probably bad fuel. He stated this was excessive speed & that there was nothing that Audi could do further to assist!

I also asked about the ECU/0080 version/updates/reset etc, but he didn't have a clue what I was talking about. I had a look at his PC screen & seen that one of the codes was 0080 - presumably mine?

His manner got worse when I said that there may be similar problems elswhere & possible reasons why via these forums. The answer to this was ''You shouldn't listen to other people, they don't know what they are talking about'' (this was the same guy last year that said there was no problems with the DRC on RS4's...).

I accept that there is a problem testing cars with high speed problems, but what does one do? All I got was ''Audi cannot help further''.

He made me feel that I should never drive my car fast, and if I did & there was a problem, then tough!

Since this, I have phoned Audi UK about the unhelpful manner of their Tec guy & my problem.

They said they could help further. I was told to take the car to my dealer & ask for a DISS Report. This could then be sent to Milton Keynes for further analysis. Now awaiting a call from my local dealer.

Post by **George1976** » Fri Mar 06, 2009 5:57 pm

I got mine back yesterday after 3 weeks with Derby Audi (whos Techs are excellent by the way).

It's had a complete new engine. Unbelieveably the problem is still there - i.e. erratic power from 5500 upwards. I'm going to allow 1000 mls or so before taking it back. They've already agreed to continue to diagnose it should the problem continue. I'm running out of ideas and anything caused by the following has now been eliminated:

1. Anything to do with the mechanicals in the block&head including injectors/plugs/coilpacks/manifold
2. fuel pressure regulator/bad fuel/vacuum systems
3. Air flow and or sensors
4. ECU & Settings (on 0090 with basics reset)
5. Exhaust (its had 2 new rear silencers)

Does anyone have anymore suggestions?

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hesitation at high RPM

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