Nissan Primera P11 Suction when opening fuel cap |
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gerald12 
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 Topic: Nissan Primera P11 Suction when opening fuel capPosted: 31 Jan 2012 at 3:44pm |
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I've noticed that whenever opening the fuel cap of my 1998 Primera 1.6 SLX that there is a rush of air into the fuel tank (negative pressure in the tank). Is this normal?
The car runs OK and there are no warning lights. Many thanks for any advice. |
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dcal
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Posted: 31 Jan 2012 at 3:47pm |
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both of mine have done that if ive driven them until theyre so empty theyre driving on fumes. i think its normal.
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Sick of it!
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Geordie
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Posted: 31 Jan 2012 at 3:55pm |
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My wallet makes the same sort of gasping noise when I pay for it
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Car of the Month April 2010 (Black GT)
Car of the Month August 2012 (Red Wagon) "You are a one man, used car industry, improvement system!!" - Tom (12/12/16) Current: 1991 P10 2 litre GS |
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twelve
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Posted: 31 Jan 2012 at 3:56pm |
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Hi gerald and a big welcome to NPOC
I have edited your thread title and made sure it starts with "Nissan Primera P11" - Please keep on top of that (it is explained in our forum rules):
Point 2)
Phil To answer your question, the fuel system is pressurised. Opening the fuel cap releases the pressure so it's completely normal to hear air rushing in. |
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blockingbandit
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Posted: 31 Jan 2012 at 3:59pm |
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i normally use the noise to gauge how dry the tank is
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i reject your reality and substitute my own
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dcal
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Posted: 31 Jan 2012 at 4:00pm |
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hurray dcal gets somthing right again
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Sick of it!
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dyp
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Posted: 31 Jan 2012 at 4:01pm |
Haha me too
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gerald12
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Posted: 31 Jan 2012 at 4:02pm |
Thanks very much for the welcome and for adding the P11 info to my post - sorry I missed that. Also many thanks for the answer to the fuel pressurisation - good to know it's normal! Regards |
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Kensai86
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Posted: 31 Jan 2012 at 4:34pm |
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its a blocked fuel tank vent filter. my p10 and p11 loon did this. the sri and the w11 dont though... dont think it makes much difference to the running
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GT786
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Posted: 26 Jun 2018 at 10:00pm |
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Sorry for resurrecting an old thread but anyone know where the fuel tank vent filter is located on a p11 gt ?
Is it In the fuel tank ?? |
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  99 P11 GT Saloon KLO 99 P11 GTLE Hatchback AJ4 |
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blockingbandit wrote:
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