Wrong fuel! Best way to drain the petrol?

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GiveMeABreak
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Re: Wrong fuel! Best way to drain the petrol?

Post by GiveMeABreak »

That's my understanding - same access.
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Marc
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Re: Wrong fuel! Best way to drain the petrol?

Post by richarda »

Stickyfinger wrote: 28 Nov 2023, 17:53 is your car listed here (I do not know what a C4 GP is)

https://catalogs.ssg.asia/citroen/?lang=en
No it not listed there...
It is a Citroen C4 Grand Picasso 1.6 HDI VTR+ 2011
I posted a picture below.

Thanks for the help.
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Re: Wrong fuel! Best way to drain the petrol?

Post by GiveMeABreak »

Ok, form your VIN posted on your other thread, you have a 'gauge without pump' in the fuel tank. So I can't say for sure if this will be immune from damage being a sender only - but I can't say for sure how this incident will have affected the High Pressure Fuel Pump on the engine.
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Re: Wrong fuel! Best way to drain the petrol?

Post by richarda »

Hi Marc thanks for the confirmation about the pump in the tank. Would you know if fuel is pumped from the tank when only the ignition in on. So no engine running but key turned one click.? I assumed that as there is no pump in the tank but I don't know for sure.
Thanks RichardA.
Thanks Richard
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Re: Wrong fuel! Best way to drain the petrol?

Post by GiveMeABreak »

You have a Fuel flow regulation valve that regulates the fuel sent to the components of the high pressure pump.

When the fuel flow regulation valve is supplied:
  • The flow regulation valve coil drives the slide valve (magnetic force)
  • The connection between the 2 pipes is open
  • The inlet to the "high pressure" stage of the high pressure fuel pump is open
When the fuel flow regulation valve is not supplied:
  • The slide valve is positioned flush at the bottom of its location by means of the spring
  • The connection between the 2 pipes is closed
I can't say at what point all this kicks off, but obviously I suspect it will be at ignition on in readiness to start the engine by ensuring fuel is ready. Your saving grace may be that there will already be a small quantity of fuel in the valve and in the high pressure pump (which also incorporates the low pressure pump), so if you have not started the engine, the chances of any petrol contamination getting to the Fuel Regulation valve and Low / High Pressure pump will be slim.

So if you have changed out all the petrol and cleaned the tank, you may be ok.
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Re: Wrong fuel! Best way to drain the petrol?

Post by richarda »

Marc, again many thanks for the information and advice.
Update on this, I have managed to remove ~26l of fuel from the tank using a manual Rocwood 4 L Litre Oil Fluid Extractor Pump Syphon. (nothing fancy something I had in the loft ~£12 a few years ago)
The siphon tubes I had in were not long enough, I estimated about 1.2M from refill flap to tank, so I jammed a 6mm pipe into a 8mm pipe (8MM connected at the pump end.) So total length was about 2 meters.
I stuffed the 6mm end down the filler pipe and was able pump/siphon the fuel out in 4 litre batches. 7 trips back to the shed to decant later no more would come.
I now have added 10 litres of diesel.
Expecting some petrol in the mix after a full refill as I expect there was a bit left in the bottom of the tank. (Maybe 2l - 5l of Diesel Petrol mixed left over?)
Not started it yet, today I will drive it to nearest petrol station and fill it up...
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Stickyfinger
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Re: Wrong fuel! Best way to drain the petrol?

Post by Stickyfinger »

Well done.....before driving can you get more diesel ? (just in case ?)....I would still add a cup full of Two-Stroke oil as well....it is a very good pump lubricant.
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Re: Wrong fuel! Best way to drain the petrol?

Post by richarda »

The filling station is only about half a mile away, so drove down there on the litres no problem. Filled up, went for a 10 mile drive down the dual carriage way. No problems. Now used 1 notch on the fuel gauge, about a gallon. So far so good.
Thanks for the tip about the 2 stroke...
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Re: Wrong fuel! Best way to drain the petrol?

Post by CitroJim »

Excellent news Richard :)
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Re: Wrong fuel! Best way to drain the petrol?

Post by Stickyfinger »

Good news...........
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Re: Wrong fuel! Best way to drain the petrol?

Post by richarda »

Update, (probably final update on this unless something bad happens) 1/2 a tank gone, no problems so far, refilled to increase the dilution...
Thanks for all the help and comments shared.
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Re: Wrong fuel! Best way to drain the petrol?

Post by CitroJim »

Great! Sounds like that potential bullet was well and truly dodged :D
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Re: Wrong fuel! Best way to drain the petrol?

Post by Rp0thejester »

Well as far as I understand it Petrol is a component of Diesel so you should be able to get away with a few litres in the tank with not much to worry about. And yes I have made that mistake before but topped up with diesel afterwards to ensure a good mix.
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Re: Wrong fuel! Best way to drain the petrol?

Post by Armidillo »

Over here I am told that our "winter" diesel is 20% kerosene, never heard of petrol being a "normal" component of diesel fuel though.
Last edited by Armidillo on 17 Dec 2023, 07:51, edited 1 time in total.
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Re: Wrong fuel! Best way to drain the petrol?

Post by CitroJim »

Armidillo wrote: 17 Dec 2023, 01:33 Over here I am told that our "winter diesel" diesel is 20% kerosene, never heard of petrol being a "normal" component of diesel fuel though.
No, it isn't but back in the olden days of mechanical pumps and when diesels were not so fussy summer, diesel could be 'cut' with a bit of petrol to keep it from freezing... Or so I was told...

The veg oil boys used to do similar I believe in the dark depths of winter...
Jim

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