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razz

Member Since: 02 Oct 2015
Location: norfolk
Posts: 403

td5 not holding boost

hello everyone , while i remember , during yesterdays whizz about , i noticed the boost , does go up to 1.35 on my nanocom , but then tails off to a low reading , i have a very long uphill section of a bypass near me , and with the fitted special track tyres , she`ll pull 70 and thats it , was just wondering why it does not hold boost , if its leaking , which side would be coursing the drop ? my foot was buried in the boards for well over a mile , yet once its gets up there , fairly sharpish , the boost goes drops away

21st Jan 2018 9:12pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

Might be worth removing and cleaning the map sensor

But it could be a pipe or the intercooler. No strange noises is presume? 2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton

21st Jan 2018 9:14pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2065

Any black smoke?

Actuator move freely?

21st Jan 2018 9:21pm

razz

Member Since: 02 Oct 2015
Location: norfolk
Posts: 403

cor , you lot are fast , no strange noises cos the tyres n straight thru pipe are loud enough , its got a new big intercooler , fancy pipes etc , i`ll change the map sensor , as i have a spare , the one in is clean , a thought , could the turbo not have enough puff with the bigger intercooler i wonder

21st Jan 2018 9:26pm

razz

Member Since: 02 Oct 2015
Location: norfolk
Posts: 403

bankz5152 wrote:
Any black smoke?

Actuator move freely?

no smoke , new actuator , found the old one seized solid at the weekend , hence why my nanocom was plugged in to test n set up

21st Jan 2018 9:27pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

New intercooler and pipes would be my fist port of call then. Anything that has changed from before should be the first thing to check.

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton

21st Jan 2018 9:45pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

Also if you are running a boost limit box that could have gone faulty. But definately check what's changed first

21st Jan 2018 9:47pm

bankz5152

Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2065

Yeah what boost your running? 18psi is the limit. Any above needs a boost box or uprated MAP sensor + raised boost limit

21st Jan 2018 10:20pm

barbel jim

Member Since: 12 Dec 2012
Location: Northants
Posts: 1411

Leaky new silicon pipes would be my guess. Checked they've not slipped and the clips are tight tight. Then intercooler

21st Jan 2018 11:26pm

razz

Member Since: 02 Oct 2015
Location: norfolk
Posts: 403

Hello everyone , i’ve Checked the pipes , but will carry on tests after the weekends pay/play day . The boost is around 19psi by google . Ady

24th Jan 2018 7:15pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

Standard boost on a Td5 is 1 Bar (~15psi) 19psi is right at the upper limit of what the ECU will allow before boost cut strategy kicks in. 2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton

24th Jan 2018 7:22pm

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