Juddering/kangarooing for first 5 mins?

4.2 V8 32v Naturally Aspirated - 414 bhp
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theboyleach
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Juddering/kangarooing for first 5 mins?

Post by theboyleach » Sat Jan 04, 2014 12:39 pm

Hi guys.

Happy new year.

My 2006 RS4 developed a juddering/kangarooing after initial cold start a couple of months back.
I recently had it serviced at a specialists near cambridge where they carried out a 45k service. New plugs, filters etc.
I thought this may have cured the problem but it seems not. the problem goes after about 5 mins once the engine has warmed up.

Has anyone experienced this problem in the past? What is the solution?

thanks

Simon
Audi RS4 Cab 2006
Daytona Grey

Rick_RS4
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Re: Juddering/kangarooing for first 5 mins?

Post by Rick_RS4 » Sat Jan 04, 2014 1:11 pm

mine does it but i have stage 2 inlet manifold with removed flaps, this makes the throttle jumpy, maybe you have sticky flaps :D

Dom81
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Re: Juddering/kangarooing for first 5 mins?

Post by Dom81 » Sat Jan 04, 2014 1:16 pm

What software version are you running. SW0090 aimed to reduce jerkiness on startup - partly by running a higher idle for a short while
2007 Daytona RS4 Avant

rwilsonrs4
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Re: Juddering/kangarooing for first 5 mins?

Post by rwilsonrs4 » Sat Jan 04, 2014 6:09 pm

seems to be common on these cars , mine did it before i fitted the supercharger fitted and it still does it a little even with a full custom map
Phantom black saloon ,PES M112 Supercharged 520ps/595nm K&N filter, 100 cell milltek cats,res valved milltek system. 8 and 10mm H&R spacers.H&R roll bars, "smoke chrome " alloy refurb. JHM Quickshifter, Bilstein B16 coilovers , uprated diff mount ,50/50 devils own WM kit so 1.4 litres/min in intake approx 10% more power and torque
1/4 mile 12.01 secs 123.5mph

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PetrolDave
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Re: Juddering/kangarooing for first 5 mins?

Post by PetrolDave » Sat Jan 04, 2014 6:37 pm

Dom81 wrote:What software version are you running. SW0090 aimed to reduce jerkiness on startup - partly by running a higher idle for a short while
+1

I had jerky running for the first mile or so after a cold start when I had SW 0080, getting it updated to SW0090 has solved the problem.

My MRC remap has got rid of the very fast initial idle that came with SW0090.
Gone: 2006 B7 RS4 Avant (Phantom Black)

NickB
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Re: Juddering/kangarooing for first 5 mins?

Post by NickB » Sat Apr 26, 2014 8:03 am

I bought my car in Jan this year and have exactly the same problem - particularly on light throttle opening. It's not quite as bad now that the mornings are warmer but it is a bit annoying.

For those who've had the upgrade to SW0090, do you reckon it's worth it or is the fast idle just as annoying as the jerkiness?
B5 RS4 MTM Stage 1 - Gone and much missed
C5 RS6 MTM Stage 1- Gone, missed, but not as much as the RS4
B8 S4 MTM Stage 1 (410hp, 380 ft lb) - Gone and missed
C7 A6 Allroad BiTDI MTM (380hp, 575 ft lb, YES 575 ft lb!) - Current family wagon: 0-60 in 4.9 sec and nearly 50 mpg at a steady motorway chug. That's having your cake and eating it!
B7 RS4 Avant

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PetrolDave
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Re: Juddering/kangarooing for first 5 mins?

Post by PetrolDave » Sat Apr 26, 2014 10:52 am

NickB wrote:For those who've had the upgrade to SW0090, do you reckon it's worth it or is the fast idle just as annoying as the jerkiness?
I did the 0080 to 0090 upgrade about 4 years ago, and don't regret doing it - yes the fast idle is a bit of a pain but for me the jerkiness was more annoying.
Gone: 2006 B7 RS4 Avant (Phantom Black)

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