Thank you 5-10k miles!! Shocking so glad I joined this forum I was told 50k miles I'm at 65 at mo an thought de coke maybe miltek an remap and I have a complete different car kind of burst me bubble lol cheers
A lot of the loss of power on an rs4 comes from vacuum leaks which are often corrected when a decoke is performed. Best thing to do if you're not happy with the current performance if to get it on a dyno and see what it makes - if it's making 400+ps then probably not much wrong with it. It's it's making 360 or something it's likely a vacuum leak.
Carbon will cost you maybe at worst 20ps. But a clean, remap and an exhaust will give you perhaps 30 back so you got to ask... Is £3000+ worth 30hp? Probably not IMO.
I would seriously consider a Terraclean, but make sure you go to a place that has the S-Tool. Not all agents do. The S-Tool cleans the induction side, valves etc and removes carbon deposits. I had mine done the other day £180 and the difference is noticable.
A quick power test is to put her in 3rd, then time the acceleration from 3000 to 8000 rpm. It should be around 8.5secs if running the correct output. I did this test pre clean and the best i could manage was 9 secs.. Post clean I got and 8.4... Very pleased with the results.
They claim it's as good as a manual carbon clean and I'm confident (as are all the major tuning companies) that it's not.
When AMD/MRC/revolution/Unit20 all say the same thing - that it's no replacement for a manual clean - I'm inclined to believe them.
Sure - it can remove some deposits. But anyone who's actually done a clean and seen the solid lumps of rock hard carbon that come out will testify, no gas is removing that when it takes elbow grease and a scraper to get it off by hand.
I'm sure it improves things - but a replacement for a manual clean it isn't.