Technical Faulty Air Flow Meter

[Minime]

Since buying my Marea Weekend TD125 last week, I'd discovered that it would refuse to accelerate at all after maintaining a steady speed. To temporarily solve the problem, I had to keep dipping the clutch to allow the revs to fall to idle, then try again.

Others who share the problem discussed possible causes and remedies in the thread, "Marea 2.4 TD does not like hills"
( https://www.fiatforum.com/showthread.php?t=11653 )

Based on a suggestion in the thread, I've unplugged the air flow meter and it appears to have solved the lack of acceleration that the car suffered . Although the car always accelerates when required since unplugging the AFM, it feels a bit sluggish .

Where's the best place to buy a new AFM (apart from Fiat Dealers)? I know I could try breakers yards, but there's a chance that an AFM bought from a breakers might also be faulty, if this is a common problem.

Is a faulty AFM ever DIY-fixable? What is the likely cause of failure - a jammed air flap (that can be mended by spraying liberal amounts of WD40)? The AFM on my car is clamped to the rubber hosing from the air filter by what looks like factory fitted tamper proof jubilee clips that will need to be broken for removal of the AFM. Is it worth me taking them off and having a go at fixing it, or is the fault likely to be something a bit more technical than a seized part?

Cheers, Neil

 

[custard]

well if you are going to replace it anyway i see no harm in a bit of messing around.big jubilees will secure the trunking fine.
worth checking the 'flap' is free moving and any sensors are clear.perhaps one of the tech guys will know the standard voltages produced to check against

 

[CROfiat]

It seems to me that you did not understand me very vell. I had the same problem with marea 2.4 td, and problem is not Air Flow Meter. I have changed that sensor, but problem with marea did not gone. Problem is in electro-valve which liberates vacuum on EGR valve, when it needs to be open.
You can check that. When engine is on, and press aceleration pedal several times, and than put your finger, on the vacuum tube which is connected on top of EGR valve. You must feel vacuum on finger if everything is o.k., if not, this is problem.

 

[Minime]

It seems to me that you did not understand me very vell. I had the same problem with marea 2.4 td, and problem is not Air Flow Meter. I have changed that sensor, but problem with marea did not gone. Problem is in electro-valve which liberates vacuum on EGR valve, when it needs to be open...QUOTE]

I assumed that because the problem happens when the air flow meter is plugged in and does't happen when it's unplugged, that it's a problem with the air flow meter.