Gush of air from fuel tank

bledd · 9 Jul 2012 at 15:19

Every car I've had does this when you brim the tank and then run it near empty. Just air filling the vacuum

Outcast · 9 Jul 2012 at 16:37

PikeyPriest said:
Because there will be a way to let air in surely. Otherwise there is no way the fuel pump could function. Try pumping 50L of water out of a fixed airtight box and see how far you get before the tank collapses or you can't pump anymore.

The fuel cap breather can get blocked.

I once got my Capri 3.0s towed all the way back from Shrewsbury to Peterborough (by a 1.3 Astra). I took the engine to bits thinking I'd stripped some teeth off the front fibre cam wheel only to find nothing wrong... Took ages to suss it.

Took the fuel cap off and heard "smoooof" of air .

Car fired up no probs !!

Also had a reefer pack up with the same issue ( I was the wise one this time !!)

Our truck fuel tanks make a heck of a bang when we release the fuel cap too. 280 litres of fuel being removed tends to make a vacuum.

tigerstyle · 10 Jul 2012 at 01:38

Outcast said:
Also had a reefer pack up with the same issue ( I was the wise one this time !!)

How long can a reefer run for on it's tank? How many litres is the tank on them?

wazza300 · 10 Jul 2012 at 01:44

its just the petrol vapour building up pressure as the petrol sloshes around in your tank,the breather can only let so much escape

Outcast · 10 Jul 2012 at 04:11

tigerstyle said:
How long can a reefer run for on it's tank? How many litres is the tank on them?

About 180 litres. How long they can run on it depends on the weather

tigerstyle · 10 Jul 2012 at 13:23

Outcast said:
How long they can run on it depends on the weather

True, Do you get freezer reefers and fridge reefers? (guess so)
Need to make a seperate thread, always loved the hidden tech in those, and a fair bit of $$$ in the maintenance/repair aspect, kinda fun work too!

PardonTheWait · 10 Jul 2012 at 14:53

My 306 did it, 106 doesn't. It's only the petrol vapour puffing up surely, 5l petrol cans do it loads to the point where you have to leave them a tiny bit open if they're in the boot on a hot day.

Outcast · 10 Jul 2012 at 15:33

tigerstyle said:
True, Do you get freezer reefers and fridge reefers? (guess so)
Need to make a seperate thread, always loved the hidden tech in those, and a fair bit of $$$ in the maintenance/repair aspect, kinda fun work too!

Dual compartment, Twin Evap

We run both frozen and chilled at the same time. Either Frozen front & chilled rear or reversed.

Our trailers cost around £100K.

We are currently trialling for the government 28 & 30 pallet trailers.