De-coke before and after

Post by **munsen99** » Sat Oct 04, 2014 12:32 pm

Just picked up the beast after having it de-coked and compressions tested.

367bhp before and 410bhp after. Pretty pleased with that as i don't think its been re-mapped.

They also replaced a couple of valves due to corrosion.

Full oil change as well and car sounds and runs amazing.

Post by **Rick_RS4** » Sat Oct 04, 2014 1:20 pm

nice, AMD did a great job, what engine mods do you have?

Post by **munsen99** » Sat Oct 04, 2014 1:47 pm

No prior mods im aware of but AMD did replace the OEM air filter with a pipercross.

Post by **Cerec1** » Sat Oct 04, 2014 2:00 pm

munsen99 wrote:No prior mods im aware of but AMD did replace the OEM air filter with a pipercross.

And it cost the princely sum of ?
Mines never been done as far as I know and showing 76K. Must be due soon

Post by **munsen99** » Sat Oct 04, 2014 2:08 pm

Same mileage as mine

De coke was £500... Al in all, cant complain.

Post by **harding** » Sat Oct 04, 2014 4:35 pm

In sweden there are almost no workshops experienced enough to do a de-coke. There is one but they take around 3000euros for it

Post by **Rw@@dy** » Sat Oct 04, 2014 4:46 pm

How long did it take?

Post by **munsen99** » Sat Oct 04, 2014 5:06 pm

Took a week but I had other maintenance work done at the same time. Very happy with the outcome.

Post by **C5ARK_RS4** » Sat Oct 04, 2014 5:34 pm

Looking Good

Post by **RossDagley** » Tue Oct 07, 2014 10:09 am

Must have had a vacuum leak previously also to recover that much lost power. Those photos don't look TOO bad :p Just be prepared for it to look like that again in 18 months! Car will thank you in other ways too now - smoother running and better mpg.

Post by **Cerec1** » Tue Oct 07, 2014 10:42 am

RossDagley wrote:Must have had a vacuum leak previously also to recover that much lost power. Those photos don't look TOO bad :p Just be prepared for it to look like that again in 18 months! Car will thank you in other ways too now - smoother running and better mpg.

I do find it hard to believe that a simple de-coke which will restore flow can produce such massive BHP gains.
I'm new to RS4's and follow all this stuff.
Tel me about the vacuum leaks. How do they get diagnosed? Seem like a regular issue with these cars.

Post by **Ben @ AmD Essex** » Tue Oct 07, 2014 3:51 pm

Afternoon All,

Just to confirm, this car did have vac leak issues, the N335 valve (pictured above in the last image) had failed, so the recouped power was due to the decoke and fixing the vac problem.

HTH,

Ben

Post by **Baz4** » Tue Oct 07, 2014 4:43 pm

Any ideas what the valve controlled, is it the airbox one?

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