A&Q about 350Z
Q:
Should my 82 1800 gti filler cap hiss when i take the cap off as im having starting problems and need to know if this is the norm...
thanks
A:
i had this problem with my mk1 a couple of years ago, you need a new filler cap. basically its causing excess pressure in the fuel system and not allowing the pump to pull enough fuel through. thats why it doesent start properly. i think there is a breather hole in it which is blocked, eventually the pump will go which it did on mine. a new cap should sort this out
A:
Yes it should hiss, the GTI cap is of a non-vented design (you can get vented ones that look the same).
A:
mine was a little more than a hiss, more of a woosh for a few seconds, i had trouble to get the cap off, there was so much suction !!!
A:
surely that must effect fuel flow? i dont think mine hisses at all :P
A:
They are meant to hiss, the tank is under negative pressure so that rather than vent fumes into the air, they suck in fresh air instead. All about emissions control......
A:
Mine was doing this, swapped out the gravity valve and that seems to have cured it.