Botus
Senior Member
So finally got round to giving this method of inlet manifold clean up a go... on a 103k mile w211 280CDI
mixed 50 50 tepid water and room temp methanol into a garden spray thingy....
took off the right side air box and started it up
set the nozzle about as fine as it would do, held revs around 2k and sprayed in the inlet... various revs blipping the throttle etc. up to 3.5k little reaction from the car... kinda wondered how the MAF didn't get upset taking a bath....
the flow rate was around 3 litres in 25 mins
had small amount of smoke out the back but nothing extreme, and could just detected a smell of something out of the ordinary in exhaust fumes but generally seemed very happy
after 12 to 15mins or so I decided to drop revs to around 1500 to see if increasing water % would do anything, after about 45 seconds the car started to misfire and run like a dog and I thought it was going to die, dropped out water mist and blipped the throttle.... after 10 seconds or so it stuttered out of misfire and revved out cleanly but with shed loads of crap out the back - a distinct blue haze....
once it cleared dropped back to idle and it ran normally and smoke cleared, if anything it seemed to be running crisper at idle, blipped throttle everything seemed normal and smoke cleared.... still no lights on the dash
went back to 2 to 3 k revs and pushed the rest of 3 litres cleaning mix through, talking around 25 mins in total, put in 2 x air filters started and stopped engine a few times, no lights, car seems normal
went for 10 mile drive parked up hour later 10 mile drive home... seems to drive the same
mixed 50 50 tepid water and room temp methanol into a garden spray thingy....
took off the right side air box and started it up
set the nozzle about as fine as it would do, held revs around 2k and sprayed in the inlet... various revs blipping the throttle etc. up to 3.5k little reaction from the car... kinda wondered how the MAF didn't get upset taking a bath....
the flow rate was around 3 litres in 25 mins
had small amount of smoke out the back but nothing extreme, and could just detected a smell of something out of the ordinary in exhaust fumes but generally seemed very happy
after 12 to 15mins or so I decided to drop revs to around 1500 to see if increasing water % would do anything, after about 45 seconds the car started to misfire and run like a dog and I thought it was going to die, dropped out water mist and blipped the throttle.... after 10 seconds or so it stuttered out of misfire and revved out cleanly but with shed loads of crap out the back - a distinct blue haze....
once it cleared dropped back to idle and it ran normally and smoke cleared, if anything it seemed to be running crisper at idle, blipped throttle everything seemed normal and smoke cleared.... still no lights on the dash
went back to 2 to 3 k revs and pushed the rest of 3 litres cleaning mix through, talking around 25 mins in total, put in 2 x air filters started and stopped engine a few times, no lights, car seems normal
went for 10 mile drive parked up hour later 10 mile drive home... seems to drive the same