One Click or Two Clicks ?

roddydogs

jm2926 wrote: »

Why do some pumps click off all the time when the tank is no where near full? Both myself and other half fill the car at 1/4 tank or when the light comes on, and some pumps are very reluctant to fill and keep clicking off throughout the process. Other pumps are fine.

One car petrol other diesel. Filled mine tonight and had to keep the lever lightly pressed and even then it cut out 4-5 times taking £36 of petrol.

It depends on the "Angle" of the nozzle,& how you are holding it. if you get it wrong it could click of after ,say 1 Gall, & all stations are different.:D

Moto2

jm2926 wrote: »

Why do some pumps click off all the time when the tank is no where near full? Both myself and other half fill the car at 1/4 tank or when the light comes on, and some pumps are very reluctant to fill and keep clicking off throughout the process. Other pumps are fine.

One car petrol other diesel. Filled mine tonight and had to keep the lever lightly pressed and even then it cut out 4-5 times taking £36 of petrol.

It's the angle of the filler neck on your tank
That causes enough back up to trigger the shut off valve

reeac

If you fill to the brim [more than one click] on a hot day then beware of thermal expansion of the fuel. It's stored underground at maybe 50F and unless you drive a fair distance immediately after filling you stand a good chance of spillage as the fuel warms up.

LandyAndy

jm2926 wrote: »

Why do some pumps click off all the time when the tank is no where near full? Both myself and other half fill the car at 1/4 tank or when the light comes on, and some pumps are very reluctant to fill and keep clicking off throughout the process. Other pumps are fine.

One car petrol other diesel. Filled mine tonight and had to keep the lever lightly pressed and even then it cut out 4-5 times taking £36 of petrol.

When I first got my Mazda2 I had terrible trouble with this. It sometimes clicked off a dozen times while putting 30 litres in. Took several fills to realise I wasn't pushing the nozzle as far in to the neck as it would go. As soon as I did that, problem solved.

LandyAndy

Richard53 wrote: »

Three at least, but then I am greedy.

Seriously, if I am brimming the tank to do a mileage check, I let it click precisely three times. That's because when the fuel is filling, it's sloshing about a lot and it's pretty random when it clicks off. But if you pause and then do another click or two a) you get quite a lot more in, half a litre or so, and b) it's in the filler neck by then and any measuring error is less.

BTW, I haven't lost a drop by doing it that way, so it's not overfilling it.

I do this.

EdGasket

If you fill to the brim, you run the risk of flooding the charcoal vapour cannister (part of the emission control system), rupturing the membrane and all those charcoal balls blocking up your fuel lines. I never fill right up except by occasional accident; I know how much the tank holds and fill up to approx. 7/8 capacity. Also there is no point carrying excess fuel weight around.

Weird_Nev

EdGasket wrote: »

If you fill to the brim, you run the risk of flooding the charcoal vapour cannister (part of the emission control system), rupturing the membrane and all those charcoal balls blocking up your fuel lines. I never fill right up except by occasional accident; I know how much the tank holds and fill up to approx. 7/8 capacity. Also there is no point carrying excess fuel weight around.

I have never, ever heard of that happening, and it sounds like a major design flaw if it could happen.

Also, you spend 1/8th more of your life than you have to on petrol forecourts.

photome

Weird_Nev wrote: »

I have never, ever heard of that happening, and it sounds like a major design flaw if it could happen.

Also, you spend 1/8th more of your life than you have to on petrol forecourts.

Me neither, must be true though if its posted on here

As posted I try to fill mine each time and havent had this issue

As for weight carrying, my guess is in the long term I save more by making fewer trips to fill up