Vito Engine Management Light - spent £1000 so far and it's still on!!!

[initialb]

Hi folks,

I have a 2007 Vito 111 CDI

For some time now, my EML has been on, and my Vito has been down on power. A few weeks ago, I found a blown fuse in the main fuse box, and when I replaced it and took the car out - full power had returned and the EML went out. This was short lived, as a week later the light re-appeared and I lost power again. when I checked the fuse I had replaced earlier, it was fine.

I took the car to Mercedes, who put it on the computer and told me to change the EGR valve and the Air Flow Meter. I changed both of these, but the light is still on and I'm down on power. Interestingly, I still get full revs, just not full power.

The computer report from Mercedes also said there was a funny reading from the Lambda sensor, could this be a possible cause? The car has been de-catted as a previous turbo failure blocked the original cats, so I wondered if that would be the cause of the funny Lambda reading. I've spent a load of money on this already and I'm reluctant to keep throwing money at the problem.

Any suggestions greatfully received,

Brian.

 

[initialb]

Ok,

I bought an OBD2 port reader to see what faults remained.

The fault codes picked up were:

PO243 - turbocharger wastegate solenoid A malfunction
P0087 - fuel rail/system pressure too low
P0101 - Mass or Volume Air Flow Circuit Range/Performance Problem

P0243 was probably myown doing as I started the car with the wastegate connector off.

P0087 I have no idea about.

P0101 has me stumped as a new Mercedes MAF has just been fitted at a cost ofover £300.

I cleared the faults, and the EML went out, with almost full power returning to the car.

If I stop the car, turn off te ignition and leave it a while, when I re-start the car the EML is back on, and code P0101 is displayed on the code reader.

New MAF sensor, all wiring looks good...any ideas?

 

[BlackC55]

The live data needs to be checked. The codes help but it's not all the info.

 

[abecketts]

hello, welcome and where are you, a recommended independent garage may be your best bet to sort this.

 

[Danny DeVito]

Probably because it was cleaning the injectors up.

I would be checking for gummed injectors and piston ring blow-by.

Same effect with REDEX i had, keep up with treatment and i smooths out nicely. Though after running throught the Renault 5 1.7 gtx i had the head off after and the supposed carbon removal didnt exactly wow me.