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itchyfeet

Member

• Apr 28, 2013

• #1

Hi all,
when taking off my fuel filler cap I get quite a lot of pressure build up. Is this normal or are there some tank vents that are blocked? If so are they an easy repair/fix?

many thanks,
itchy.

 

wammers

No longer with us, RIP

Donater

• Apr 29, 2013

• #2

If it's a petrol there is a valve in the emissions system that is supposed to open and vent excess pressure into the induction system. Maybe that is sticking or not working. Look at RAVE for details.

 

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itchyfeet

Member

• May 6, 2013

• #3

Hi Wammers,
I've been away for a couple of weeks and have only just caught up with your reply. Thanks for the info and i'll check out RAVE as suggested.:beer2:

 

sas1810

New Member

• May 6, 2013

• #4

wammers said:

If it's a petrol there is a valve in the emissions system that is supposed to open and vent excess pressure into the induction system. Maybe that is sticking or not working. Look at RAVE for details.

Click to expand...

I know this is a bit of a daft question, and sorry for jacking the post, but if that said valve is faulty, could that induce bad running?

 

Datatek

Well-Known Member

• May 7, 2013

• #5

sas1810 said:

I know this is a bit of a daft question, and sorry for jacking the post, but if that said valve is faulty, could that induce bad running?

Click to expand...

I doubt it, pressure in the tank is normal on modern petrol cars as venting to the atmosphere is not allowed, there is always considerable pressure in the MR2 tank especially on a warm day.

 

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itchyfeet

Member

• May 8, 2013

• #6

aahh,
that doesn't explain my rough running then? Booked into an Indy next week to get the fault codes read.