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miker916



Member Since: 25 Oct 2022
Location: Fife
Posts: 54
Scotland 2005 Defender 90 Td5 HT Belize Green
td5 engine characteristics
Hi,

I'm new to the Td5 engine and just wondered if this is normal?
When stationary in neutral, if you blip the throttle it feels and sounds like its going to stall when the revs drop back down but then the idle cuts in and it idles normally. It revs really cleanly and smooth and no stumble once it reaches idle, its just when the revs come back down it feels odd, like the ecu is cutting fuel.

Also, with a stage 1 remap is the MAF generally disabled/bypassed?

Thanks
Mike
Post #1054688 14th Dec 2024 8:17pm
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revd



Member Since: 20 Apr 2024
Location: England
Posts: 128
United Kingdom 
I ran a standard tune 90 Td5 for 190k miles, I would say it sounds abnormal but might be the remap - ignore unless it starts stalling
Post #1054699 14th Dec 2024 10:10pm
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TVR Tommy



Member Since: 26 Nov 2013
Location: Bucks
Posts: 180
United Kingdom 2000 Defender 90 Td5 Heritage LE Bronze Green
The MAF will still be being used

Unplug it and see if you get any improvement to your return to idle.
Post #1054708 15th Dec 2024 6:59am
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4786
United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
The Td5 cuts fuel completely on overrun so the injectors are effectively switched off until fuelling is needed again, sounds normal to me.

MAF should be working but does depend on the tuner Thumbs Up 2002 90 Td5 Station Wagon
1990 Vogue SE
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Td5 90 Thread http://www.defender2.net/forum/topic50767.html
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Post #1054711 15th Dec 2024 8:27am
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miker916



Member Since: 25 Oct 2022
Location: Fife
Posts: 54
Scotland 2005 Defender 90 Td5 HT Belize Green
Thank you that’s exactly what it sounds and feels like. My old R1 track bike had the same fuel cut. I’ve watched a few YouTube vids of TD5’s revving and they all sound the same as mine.
I think im doing my usual and just trying to find faults on my new to me car.

Thanks all for the replies
Mike
Post #1054721 15th Dec 2024 10:49am
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Mike c



Member Since: 11 Aug 2017
Location: Maldon, Essex
Posts: 930
England 2004 Defender 90 Td5 CSW Belize Green
Yes, sounds like normal TD5 characteristics to me, I have owned two over the years, one in my previous Discovery and one in my current Defender, both had what you describe.

My dad also owns an auto Discovery td5 and his is the same, it can sound like its going to stall when coming off throttle but it's fine.

Mike 2004 Defender 90 Td5 CSW
2002 Discovery 2 td5 GS (gone)
1994 Defender 90 300Tdi CSW (gone)
Post #1054727 15th Dec 2024 11:11am
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