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Max Harden ([personal profile] hawkida) wrote2010-05-26 08:04 pm
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Car and fuel question

So I have filled up my car several times now, they have a tendency to drink petrol. I'd had no problems the first few times. Then, a couple of weeks back I had a few passengers and when I tried to fill the car would take a small amount of fuel before the pump cut out as though the tank was full. It did this repeatedly, taking about 70p - £2 of fuel at a time. Eventually, when the cost was what I expected to spend, I stopped. I had tried several different angles of pushing the hose's nose into the fuel tank, don't think I was doing anything different. I wondered if the car might be at a weird "laden" angle with all the passengers and asked them to get out, to no avail. So I put it down to a dodgy pump.

Today I just went and fuelled up at that same station, but a totally different pump and it's doing exactly the same thing. So, either my car's got something weirdly wrong with it, or I'm doing something stupid. My bet's on the latter. Any clues what it might be, anyone?

[identity profile] meus-profiteor.livejournal.com 2010-05-26 09:10 pm (UTC)(link)
As has been said, (in a roundabout way) it's an excess of back-pressure that's supposed to be caused by the petrol in the tank reaching the tip of the nozzle. It's a safety cutout.

Unfortunately what can happen in practice is the pump feeds petrol in so quickly it doesn't have time to drain the neck of the tank before the neck back fills. It's not uncommon on smaller cars which tend to have a slightly narrower neck on the tank.

The way round it (as has been said) is to not squeeze the grip quite so hard (fnarr-fnarr) so the petrol doesn't flow in quite so vigorously.

[identity profile] talking-dog.livejournal.com 2010-05-27 07:09 am (UTC)(link)
Yeah tell me about it mine does this all the time, and its a very small car as people have just put petrol in slower and it is fine.