I am running with the MAF disconnected at the moment as it runs poorly with it connected and fails to start, but disconnected it starts every time and has more power but smokes a bit if heavy on the pedal.
Please see below for the full story. Thanks.
I am currently having a problem with my MAF (or even EGR ??) on my 2003 JTD Multipla (115). For about the last couple of months the car has been very low on power under 2000 rpm then after that (when the turbo kicks in) it takes off like a rocket, but it all came to a head last week when it started up in the morning but just died instantly, however after many attempts to start, it simply wouldn't so I disconnected the MAF and it started first time but with a bit of smoke, a little lumpy and a bit more smoke if heavy on the pedal when driving (I know that when the MAF is disconnected the ECU reverts to a single setting default mode so this may be the reason?). I then purchased a new MAF (but not Bosch) from ebay (£35) and fitted it and all went wonderfully well after fitting it inc a 30 mile trip, until I tried to start it the next morning and the same problem happened again, so I tried to disconnect the MAF but this time it still wouldn't start until the 3rd attempt so I plugged it back in again but this time I tapped the EGR valve (attempting to free it if stick) and it started but was way down on power again just like it was originally and this had to be done every morning or it would just die instantly after starting, so I tried disconnecting the MAF again and it does start every time (without tapping the EGR) but it does give a bit of smoke out the back if I am a bit heavy on the pedal but I am thinking this is normal as the ECU is on single setting default mode.
I am left now not knowing which way to turn, whether to go and purchase a proper Bosch MAF or try to clean the original, or even to start looking at the EGR.
Any suggestions / help would be appreciated.