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 Posted: Sat Aug 18, 2012 4:32 am |
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Joined: Feb 16, 2010
Posts: 440
Trade Rating: +2
Location: Devon
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Hello all.
Anyone able to tell me the symptoms of a failing/failed air flow sensor on a HDi please?
Cheers
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Posted: Sat Aug 18, 2012 4:43 am |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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lack of power
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Posted: Sat Aug 18, 2012 4:48 am |
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Joined: Aug 08, 2011
Posts: 181
Trade Rating: 0
Location: manchester
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rough standing idel
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Posted: Sat Aug 18, 2012 6:44 am |
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Joined: Feb 12, 2010
Posts: 98
Trade Rating: 0
Location: Leeds, UK
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If it fails then the power will decrease as the ECU uses a generic setting to kind of guess the airlfow.
I thought mine was faulty last year so disconnected it to see if there was a difference and it feels like no turbo boost at all; slow acceleration.
Try disconnecting it and see if the symptoms you have are the same or worse.
Mine turned out to be the crankshaft sensor at fault which was making the car miss every once in a while.
I did actually replace the MAF sensor but it wasn't that which was faulty.
My car is a 206 1.4 HDI and I have the old MAF still which works fine if you do need one.
Andy
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Posted: Sat Aug 18, 2012 7:37 am |
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Joined: Jun 29, 2010
Posts: 244
Trade Rating: +2
Location: East Sussex
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I have mine on its way out was on our picasso which we have swapped over to my 206 1.4 till a new one arrives and the symptoms have stopped on the picasso and are now on the 206.
The symptoms are as previously stated lack of power, rough idle, and sometimes a drop off of power when pulling out of junctions or roundabouts.
Best thing get it fixed asap.
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| 206 3dr 1.4 GLX modified slightly, Lowered 35mm on full Gmax kit, 17" AEZ xylo alloys 205/45/17, 3.5" Savage back box, | |
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Posted: Fri Sep 07, 2012 10:33 am |
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Joined: Feb 16, 2010
Posts: 440
Trade Rating: +2
Location: Devon
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thought I might as well update this, I thought my MAF was on its way out. Car wouldn't really respond, MPG was down considerably and would heave out black smoke when cruising along the A roads. Although there was no faults I didn't want to go and fork out on a new MAF to discover the problem lies a bit deeper.
So read around a bit and some people have used brake cleaner to clean the MAF with.
Well I had carb cleaner and thought, what the heck, took it off and doused it through. It was fairly black as it dripped out. I let it dry out and popped it back on.
The car is different to drive now. Not so much but just a little more responsive, the smoke has gone and the MPG is up about 6/7 miles 
All in all I'm happier with it now.
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Posted: Fri Sep 07, 2012 4:14 pm |
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Joined: Feb 21, 2012
Posts: 2277
Trade Rating: +16
Location: west midlands
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which mine was as easy to fix
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Posted: Fri Sep 07, 2012 4:16 pm |
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Joined: Feb 16, 2010
Posts: 440
Trade Rating: +2
Location: Devon
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Oh dear, that does look like a trip to pug/motor factors.
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Posted: Sat Sep 08, 2012 6:14 am |
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Joined: Feb 21, 2012
Posts: 2277
Trade Rating: +16
Location: west midlands
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more like a trip to the scrap yard to leave the car there!!! soo much headace 
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