doblo
Member
Glad your problems sorted out now, I don't now if you would have put your heater to maximum with the blower on whether that would of kept the engine cooler a bit longer. PS I am now FC united for the same reason as MUFC.
Old Bo said:Hi, I thought I should add my experience of a similar problem with my 2004 Doblo JTD.
Symptoms were little power below 2500 RPM with a rush of power after this. There was a tendency to stall with rather uneven running. There was no smoke that I could see in the rear view mirror.
Having read all the Fiat forum posts I disconnected the air flow meter and the car ran much better, pulling from low speed without any problems. This seemed to me like pretty conclusive proof that the air flow meter was at fault, so I changed it... only to find that the new one made no difference.
I decided at this point to check the EGR valve and found this to be chocked with carbon. Blanking off the EGR had the car running perfectly on both the new and old MAF units.
Close inspection of the EGR showed that the solenoid had jammed and was holding the valve open by just a few millimeters. I found the solenoid was really stuck solid. Nothing would free it up and there was not enough of the plunger protruding to get an effective grip on it. Eventually i dismantled the solenoid valve further and used a drill chuck to grip the plunger and pull it out after a 2 day soaking in carb cleaner. The plunger was quite pitted but polished up OK. All was put back in place and the car is now running fine.
So on the basis of my experience, take the time to check the EGR valve by blanking it before assuming that the MAF is at fault, even if the car does run well with the MAF disconnected.
As a point of interest I felt the EGR inlet pipe to see how hot it was getting throughout this little saga. Before I removed the EGR the valve was getting hand warm pretty quickly at idle and I assumed this to be heat conduction. After fixing the EGR it was not getting warm at all for at least 5 minutes and then only slightly. When I blanked the EGR I did so at the EGR connection to the inlet pipe. In this condition the pipe was still cold after a 10 mile drive so I think that not much heat is conducted through to this pipe. If its getting warm it's due to the passage of exhaust gasses.
If anyone else has the same problem and wants to know how to fully dismantle the EGR solenoid, let me know and I can post some information.
Hope this all saves someone else some time and money. I've now got a spare MAF for when the original does pack up!
T14086 said:Where/how did you blank of the EGR valve?