Join Date: Mar 2016
My Motorhome: I drive...
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Fuel efficiency and MAF
I've had an issue recently with my 2005 Swift Freestyle (630L).
My MPG has dropped significantly from around 24mpg to circa 18mpg. I have a turbo tuning device (fitted by previous owner) and suspected this however after running some tests suggested by the manufacturer it would suggest this is OK.
During discussions with said manufacturer, they suggested a dirty or poorly functioning MAF sensor. Great thinks I - whiz it off clean or replace, jobs a goodun.... but problem!! The engine is a 2.8JTD Ducato, but the MAF isn't where it should be on the engine side of the ait filter. There doesn't seem to be one anywhere on the air intake lines. There is however a tube device fitted exactly where I would have expected the MAF. This has some sort of diaphragm and spring attached to it. Could it be that I don't have a MAF and this is some sort of mechanical equivalent? I can trace the tube connected to this to some sort of box - a tube leading from this appears to go to the oil filter??
Also I noticed when I stripped the air filter out that there is either diesel or oil in the pipework leading to the engine - and lots in the previously described diaphragm set-up.
Can anyone please shed any light on any of this? I'm really struggling to find info online and couldn't see anything similar in other posts.
Many thanks for any help.