Odd engine trouble

4.2 V8 32v Naturally Aspirated - 414 bhp
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Shoppinit
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Odd engine trouble

Post by Shoppinit » Fri Mar 07, 2014 10:27 am

Hello peeps.

Would appreciate a bit of help troubleshooting this off problem with odd symptoms but no obvious connection. Well, I can think of one, but I don't want to taint others' views.

So the symptoms are this:

1. No more one-touch start - you have to hold the start button in to keep it turning over
2. Revs don't come back down quickly after blipping throttle - results in jerky gear changes
3. Cruise control not engageable.

Anyone seen these symptoms together before?

CheeRS!

/edit: forgot to mention, I'm not with the car at the moment but will scan it ASAFP.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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alex020869
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Re: Odd engine trouble

Post by alex020869 » Fri Mar 07, 2014 10:32 am

Sounds like your clutch switch is faulty.

Cheap fix and only 10 mins work.

Alex
RS4 B7 Mugello Blue Saloon

rs4Mav
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Re: Odd engine trouble

Post by rs4Mav » Fri Mar 07, 2014 11:03 am

Defiantly your clutch peddle switch, I had the same symptoms end of last year on mine.

New switch from Audi stealers £17, fitted myself in just under 15 minutes, job done.

Just make sure you don't push the plunger in on the new switch before fitting, as this will make it useless, if you do a search on here you will find full guide on how to install it.

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Shoppinit
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Re: Odd engine trouble

Post by Shoppinit » Fri Mar 07, 2014 11:16 am

Ace. Thanks. I was thinking accelerator pedal issue, but clutch switch makes sense. Will a DTC be logged? I do like positive confirmation.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

pandavet
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Joined: Sat Mar 26, 2011 4:25 pm

Re: Odd engine trouble

Post by pandavet » Fri Mar 07, 2014 1:50 pm

Hi guys, thank you for your help. :beerchug:

The log shows effectively a clutch pedal switch default : 20€, 5 minutes... Well, 20€ for me, and 5' for Shoppinit... :biggrin3:
I can relax now.

JP
Frenchy lost among UK fans... ;)
Current : b7 RS4 Avant - Avus grey
Previous : 8p A3 2.0 TDI DSG (2004-2005), b6 A4 Avant 1.8T Quattro (2005-2007), b6 S4 Avant 4.2 (2007-2011)

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PetrolDave
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Re: Odd engine trouble

Post by PetrolDave » Fri Mar 07, 2014 6:13 pm

alex020869 wrote:Sounds like your clutch switch is faulty.

Cheap fix and only 10 mins work.
+1

Those are the 3 classic symptoms of the clutch switch having failed.
Gone: 2006 B7 RS4 Avant (Phantom Black)

coffey555
5th Gear
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Re: Odd engine trouble

Post by coffey555 » Fri Mar 07, 2014 7:42 pm

I did my one last week. Make sure you turn the new switch firmly fully clockwise when fitting (you will hear and feel an audible click when it is fully home) otherwise nothing will happen when you press the start button.
Misano Red RS4 B7 Avant

C17LJR
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Re: Odd engine trouble

Post by C17LJR » Fri Mar 07, 2014 8:54 pm

I've just got the same symptoms, better get one ordered

2007 Daytona Grey RS 4 Avant
2013 Daytona Grey RS 4 Avant

pandavet
Neutral
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Joined: Sat Mar 26, 2011 4:25 pm

Re: Odd engine trouble

Post by pandavet » Sat Mar 08, 2014 7:53 am

@coffey555 : yep, the Audi tech told me the same. ;)

JP
Frenchy lost among UK fans... ;)
Current : b7 RS4 Avant - Avus grey
Previous : 8p A3 2.0 TDI DSG (2004-2005), b6 A4 Avant 1.8T Quattro (2005-2007), b6 S4 Avant 4.2 (2007-2011)

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