shawn Posted June 20, 2021 Share Posted June 20, 2021 Another dumb question from me im afraid 😕 My Alphard lets out the biggest hiss when I unscrew the petrol cap ? Im not a new driver, In fact I am a dinosaur . Consequently I have taken countless different vehicles to the petrol station in my lifetime and some do give a little hiss when the cap is removed. But this Alphard is by far the biggest hisser I have ever encountered. So my question is - Has anybody else noticed this ? Is this normal ? Or do I have a snake in my tank ? 🐍 Thanks Quote Link to comment Share on other sites More sharing options...
MonsterS Posted June 21, 2021 Share Posted June 21, 2021 Yes thats normal, as the Petrol tank goes under pressure and creates a vacuum when its being used because of the fuel pump and injectors. The hiss is letting the pressure out. So it's a good sign if there was no hiss every time that would mean you have a leak in the fuel system and air is getting in loosing pressure. Quote Link to comment Share on other sites More sharing options...
shawn Posted June 21, 2021 Author Share Posted June 21, 2021 Well thank you. it is good to know its normal. Its a far cry from back in the day when people just stuffed a lump of rag in the hole and drove around like a petrol bomb waiting to happen.😱 Quote Link to comment Share on other sites More sharing options...
Rojie Posted November 15, 2021 Share Posted November 15, 2021 On 6/21/2021 at 6:01 PM, shawn said: Well thank you. it is good to know its normal. Its a far cry from back in the day when people just stuffed a lump of rag in the hole and drove around like a petrol bomb waiting to happen.😱 Molotov cocktails to you too ! Quote Link to comment Share on other sites More sharing options...
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