FSI carbon build up
Discussion
Well I went in to VW to show the technician a noise, he said it's probably the fan belt, cheap part he said.
Anyway on our drive I explained the jerkiness of the car when coming on and off the accelerator, the metallic pinging sound under load and he said it's the build up of deposits in the engine somewhere (forgot where he said, he got complex with it lol). He said it will eventually happen on these FSI's and requires the engine head to be taken off to clean it out. I asked if that's why VW have gradually stopped with the FSI and he said "ye ther shi*". I always use V power which is the first question he asked me, but even now the car is pinging and they're is nothing I can do.
There's some kind of fuel additive which they use in the RS4 to clear it out (2 different cars I know but I want to try), anybody know what it's called?
Anyway on our drive I explained the jerkiness of the car when coming on and off the accelerator, the metallic pinging sound under load and he said it's the build up of deposits in the engine somewhere (forgot where he said, he got complex with it lol). He said it will eventually happen on these FSI's and requires the engine head to be taken off to clean it out. I asked if that's why VW have gradually stopped with the FSI and he said "ye ther shi*". I always use V power which is the first question he asked me, but even now the car is pinging and they're is nothing I can do.
There's some kind of fuel additive which they use in the RS4 to clear it out (2 different cars I know but I want to try), anybody know what it's called?
If the car is actually running lean enough to pink you've got a problem that's more serious than a bit of carbon buildup in the inlet manifold, I can't see how this could effect the mixture the engine is running.
The *original* FSI was as you put it a f****** silly idea that VAG binned and it's now a brand name for direct injection that is very much current. The buildup problem is very simply that the fuel doesn't go anywhere near the inlet manifold so it can't clean it and the sealed breather system means that any gunk the engine spits out (oil vapour etc.) gets dumped in the manifold and over time builds up.
I think Wurth and a couple of others do cleaner additives for direct injection engines but I have absolutely no idea how one uses one or how good it is. I would be very interested to hear of any first hand experience
The *original* FSI was as you put it a f****** silly idea that VAG binned and it's now a brand name for direct injection that is very much current. The buildup problem is very simply that the fuel doesn't go anywhere near the inlet manifold so it can't clean it and the sealed breather system means that any gunk the engine spits out (oil vapour etc.) gets dumped in the manifold and over time builds up.
I think Wurth and a couple of others do cleaner additives for direct injection engines but I have absolutely no idea how one uses one or how good it is. I would be very interested to hear of any first hand experience
I was merely repeating what the technician said 
. I found this seafoam product which I'm going to ask my VW specialist about and how to apply it etc. What do you think?
http://www.seafoamsales.com/motor-treatment.html
. I found this seafoam product which I'm going to ask my VW specialist about and how to apply it etc. What do you think?http://www.seafoamsales.com/motor-treatment.html
Oil system additives I don't trust at all, see Opie Oil's posts around here for the reasons why.
Fuel system additives never go where the deposits are because FSI is direct injection so fuel only ever hits the combustion chamber rather than the inlet manifold.
Doug @ MRC's article here is excellent:
http://www.mrctuning.com/index.php?option=com_cont...
Fuel system additives never go where the deposits are because FSI is direct injection so fuel only ever hits the combustion chamber rather than the inlet manifold.
Doug @ MRC's article here is excellent:
http://www.mrctuning.com/index.php?option=com_cont...
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