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Guinness



Member Since: 04 Mar 2021
Location: Scotland
Posts: 55
United Kingdom 
Potential faulty MAF sensor
Hi all,

I have an intermittent problem; Sometimes when I start my defender up there is no power and even when not in gear cant get revs high (dont have a rev count but i would guess maybe 2500?), this will last for about 15 seconds.

The other occasion a fault occurs is on a steep incline, although much rarer, even after driving the car for half an hour, reaching maybe a 25% incline and the revs just start to drop.

From other forums and posts, the maf seems like the likely culprit but its not conclusive, Can anyone impart some wisdom?
Post #953458 24th May 2022 10:39am
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jimbo55



Member Since: 15 Jul 2020
Location: Midlands
Posts: 399
United Kingdom 
The easiest way to check if it is the maf sensor is to unplug it and drive round with it disconnected. The ECU will resort to a default calculation instead of the measured value. If it drives fine then look to replace the MAF, if it still occurs then you’ll have to dig a bit further.
Post #953466 24th May 2022 11:01am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410
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The above is spot on Thumbs Up
Post #953475 24th May 2022 12:27pm
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Guinness



Member Since: 04 Mar 2021
Location: Scotland
Posts: 55
United Kingdom 
great, I will have a go now. Will this have any negative effect? As it is only an intermittent problem I may have to have it unplugged for a while circa. 1 month to be able to be sure?
Post #953479 24th May 2022 12:53pm
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pjm-84



Member Since: 12 Apr 2021
Location: Hampshire
Posts: 662
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No it will hopefully fly in comparsion. Had a miss on my TD5 and oil from the performance filter was coating the MAF sensor. When I disconnected it was sooooo different.
Post #953482 24th May 2022 1:16pm
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Guinness



Member Since: 04 Mar 2021
Location: Scotland
Posts: 55
United Kingdom 
My fingers are crossed, ill update in a month or so!
Post #953487 24th May 2022 1:52pm
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