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R230 SL350 Presnt, Past - W208 CLK230K 2000, W203 C Class, W202 C Class, W210 E Class, W201 190E
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Discussion Starter #1 (Edited)
I thought I would share some lessons learned from a problem I was having with oil on my MAF causing the car to run with poor performance which I have now cured.
Thanks to to this forum and from reading ''jamesmc'' post on similar issues he had, I managed to cure my problem but will add some additional advice.

The car I have is a CLK 230K and I had noticed the performance was not as 'electric' as once it once was but to be honest had got used to it. Then when I needed to accelerate one day it just was too slow and the supercharger has been intermitently working and I found if it stopped working it would come back on if I re-started the car.

All of this pointed to the MAF as the suspect, but first I had to stop the cause of the oil getting on it (Before you say K&N, this is a not the case on a 230K as the MAF is on the other side of the car). Unlike a turbocharger, there is no oil feed from the engine to the Kompressor. The only oil the supercharger uses is held in a tiny inbuilt reservoir within the compressor body itself and with blocked breather nozzles inside the inlet manifold means the oil gets forced the wrong way and hits the MAF.

So the fix is:
1 - Unbolt the inlet manifold along with the fuel rail and move away from the engine.
2 - If you look at my photos you'll see the build up of old oil and crudd and the small brass nozzles with a 1mm hole are completly blocked.
3 - Remove the two tubes underneath connecting to the nozzles which will probably be very brittle and break and you will need to remove the broken part left on the underside of the nozzle.
4 - I Then bought some fuel injection tube the same diameter and just made up two more new pieces to replace the broken tube from the T-Piece.
5 - Clean all the old oil from the inlet manifold, I used accetone and brake cleaner and squirted some right through the nozzles with the plastic tube now nice a clean !
6 - Re-assemble and try it out.

Unfortunately for me this is where I had to work on my MAF as despite the cleaning I had done when I reconnected the battery and performed a reset procedure the MAF was no good and the car would not run at all. It seemed the car had learned the old MAF and now the ECU was cleared it was not running. I had a spare MAF in my garage from an old E-Class which I temporaly connected up and the car idled but did not run well, however this gave me enough confidence that the MAF was at fault.
I bought a new MAF today (Boy these things are cheap these days £70! I remember spending £350), connected the new MAF and did a full reset both with the car and throttle and OMG my car is rediculously smooth and the speed is nothing I ever remembered before incredible and with the Supercharger its mental !

Website seems to be lot working with sending pics so will try later...
 

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Registered
R230 SL350 Presnt, Past - W208 CLK230K 2000, W203 C Class, W202 C Class, W210 E Class, W201 190E
Joined
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1,471 Posts
Discussion Starter #3
Nice, I did the same last week, big improvement!
Lots of photos here
I saw your post, great photos, blockage looked exactly like mine did, good idea with the guitar string, I used welding wire !
By the way did the two pipes from the T-Piece break as you took them off and were they brittle?, Mine were and I replaced with new fuel injection tubing.
 
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