Technical Airflow Mass Sensor Disconnected

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Technical Airflow Mass Sensor Disconnected

avk

New member
Joined
Apr 21, 2007
Messages
5
Hello,
I just disconnected the AFM on my Doblo which corrected immediately my problem with acceleration. I also noticed that my gas mileage had deteriorated. Does anyone know if a faulty AFM also could be the problem with the mileage? Am I damaging the engine by not having the unit replaced? Thanks you for your help and responses. Another question that I have regards the EGR. Is it's function only to decrease the levels of pollutants or does it also contribute (or the opposite) to the cars efficiency? Can the Doblo be run with the EGR blocked as is suggested in the other threads?

Alan
 

Ozzie1989

Doblo Moderator
Joined
Jan 26, 2006
Messages
2,127
Location
South Wales
Alan it is illegal to run a vehicle without/or with a modified EGR valve if it was designed to be fitted with one and if found out (ie. at MOT time) you can be fined (heavily I believe!).

As far as the AFM goes, yes it will cause you to loose MPG, if it's affecting your acceleration then it's going to affect your economy too. The vehicle is designed to run with an AFM and your MPG won't improve unless you get it replaced. This is because the ECU won't know the correct air fuel mixture so it won't run at it's optimum - this may also damage components over long periods of time.
 
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avk

New member
Joined
Apr 21, 2007
Messages
5
Thanks for your reply Ozzie. In the meantime the van accelerates like a rocket. I want to try cleaning the AFM unit but am having trouble removing it or the air pipes running to it. I read somewhere that it can be cleaned using carburator cleaner but I understand that they first took the unit out. Do you are anyone else have any tips for me about how to remove the unit?
 

toad101

just can't get enough
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Apr 21, 2006
Messages
5,077
Location
south east wales
you undo the screw holding it in using tamperproof torx keys, don't clean it with carb cleaner, use isopropal alcohol (stuff used for cleaning tape heads) and cotton buds
 
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avk

New member
Joined
Apr 21, 2007
Messages
5
Thanks for your reply Toad. I will take it apart, clean it, and lpost the results for the forum.
 

Austinscouse

New member
Joined
Oct 4, 2007
Messages
4
Hi
I have a Rover 75 as well as my Doblo. On the Rover Forum, Rover Ron has an article relating to air flow sensors, as well as lots of other items, such as EGR valves. His articles refer to other cars apart from Rovers. He is a dealer, but speaks a lot of sense. Well worth a look.
Regards
Austinscouse
 

T14086

Forum Moderator
Joined
Sep 12, 2004
Messages
39,858
Location
Preston
Not worth even attempting to 'clean' air flow meter,stick a new one on & dont pay the council tax this month.....& get change;)
 
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