Butterfly trap thing

John B · 24-08-2014, 20:35

Hi all I took my inter cooler off today to change the leak off pipes and noticed where the inter cooler pushes into the short rubber on the left there is a flap thing which seems to work off suction ? Could anyone tell me what it does and if I disconnect it by using the ball bearing trick in the vacume pipe would it make the truck go a little better ??

solarman216 · 24-08-2014, 20:46

I think you are referring to the anti shake throttle on the inlet manifold, another of Nissans wonderful ideas that does not work such that they seem not to be able to decide when to fit one and when not to as not all have it, its function is to close the flap when the engine is shut down supposedly to shaking as it stops, so you do not want to be blanking the vac pipe, Rick

John B · 24-08-2014, 21:03

So as soon as I turn the key to stop engine the flap will close ?? But my truck really shakes bad when I turn off engine and out of interest I pulled the vac pipe off and tried it and it's the same so would that mean mine don't work. Thanks john

AlexD333 · 24-08-2014, 21:36

Quote:

Originally Posted by John B

So as soon as I turn the key to stop engine the flap will close ?? But my truck really shakes bad when I turn off engine and out of interest I pulled the vac pipe off and tried it and it's the same so would that mean mine don't work. Thanks john

Think this might be normal, mine has a good shake slot of the time

solarman216 · 24-08-2014, 21:40

Quote:

Originally Posted by John B

So as soon as I turn the key to stop engine the flap will close ?? But my truck really shakes bad when I turn off engine and out of interest I pulled the vac pipe off and tried it and it's the same so would that mean mine don't work. Thanks john

not just yours, the idea did not work, full stop, just like the auto brake adjusters on the rear up to 99, Rick

AlexD333 · 24-08-2014, 23:58

Quote:

Originally Posted by solarman216

not just yours, the idea did not work, full stop, just like the auto brake adjusters on the rear up to 99, Rick

So not that I'm fussed... But what is the shake about then?

I'm sure you did explain this to me before.

John B · 25-08-2014, 09:43

If it don't work why not blank the vac pipe ? Cheers

makeitfit · 25-08-2014, 10:04

You need to make sure the flap is in the open position. Best bet is just take the ruddy thing out . Simples

Oh and don't forget to blank off the holes .

jims-terrano · 25-08-2014, 10:07

Whats this shake that people have mentioned?

makeitfit · 25-08-2014, 10:15

When you switch off the engine they have a little kind of shake as it stops!

24-08-2014, 20:35	#1
John B Senior Member Join Date: Mar 2013 Location: Wales with the sheep Vehicle: Terrano 2004 2.7 Tdi lwb Posts: 550	Butterfly trap thing Hi all I took my inter cooler off today to change the leak off pipes and noticed where the inter cooler pushes into the short rubber on the left there is a flap thing which seems to work off suction ? Could anyone tell me what it does and if I disconnect it by using the ball bearing trick in the vacume pipe would it make the truck go a little better ??

24-08-2014, 20:46	#2
solarman216 Off road maniac Join Date: Dec 2009 Location: Bexhill on Sea Vehicle: Y60 Patrol Me, 3 ltr Mrs Posts: 17,431	I think you are referring to the anti shake throttle on the inlet manifold, another of Nissans wonderful ideas that does not work such that they seem not to be able to decide when to fit one and when not to as not all have it, its function is to close the flap when the engine is shut down supposedly to shaking as it stops, so you do not want to be blanking the vac pipe, Rick __________________ Ex banger racer now off road maniac Lokka on the front with manual hubs Diff lock on rear 3 inch SS straight through exhaust Manly winch bumper with 13000 lb winch 10 spike ground anchor, with multiple straps and blocks Super strong body cills capped with scaffold pole 20% stronger springs all round aggressive off road tyres on wheels so just swap. Aim to get stuck and be completely self sufficient in extraction, love getting muddy, 2ft deep is good but rare.

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24-08-2014, 21:03	#3
John B Senior Member Join Date: Mar 2013 Location: Wales with the sheep Vehicle: Terrano 2004 2.7 Tdi lwb Posts: 550	So as soon as I turn the key to stop engine the flap will close ?? But my truck really shakes bad when I turn off engine and out of interest I pulled the vac pipe off and tried it and it's the same so would that mean mine don't work. Thanks john

25-08-2014, 09:43	#7
John B Senior Member Join Date: Mar 2013 Location: Wales with the sheep Vehicle: Terrano 2004 2.7 Tdi lwb Posts: 550	If it don't work why not blank the vac pipe ? Cheers

25-08-2014, 10:04	#8
makeitfit Senior Member Join Date: Apr 2008 Location: on the beach WEST WALES Vehicle: Maverick TDi BLACK mmm Posts: 15,136	You need to make sure the flap is in the open position. Best bet is just take the ruddy thing out . Simples Oh and don't forget to blank off the holes .

25-08-2014, 10:07	#9
jims-terrano Senior Member Join Date: Sep 2004 Location: UK Posts: 12,965	Whats this shake that people have mentioned?

25-08-2014, 10:15	#10
makeitfit Senior Member Join Date: Apr 2008 Location: on the beach WEST WALES Vehicle: Maverick TDi BLACK mmm Posts: 15,136	When you switch off the engine they have a little kind of shake as it stops!