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Ford Fiesta 1.4 Diesel 2009 - Ford Fiesta 2009 , unable to add fuel additive - BillyWhizz

Please don't laugh at me! I've routinely bought a bottle of Redex Diesel treatment 500ml, this gets added to a full fuel tank after refuelling. I have a problem in that inserting the bottle just spills the product on the ground via the overflow. I bought a baby one shot bottle with the same result. The problem is not capacity but the Ford misfuel inhibitor which won't open except naturally for a fuel pump. I tried a funnel and flexible hose with the same result, prod and poke but the fuel filler neck has been designed to incorporate contact points that open an internal fuel flap only when the larger diesel pump nozzle applies pressure on them. Any thoughts would be welcome .

Ford Fiesta 1.4 Diesel 2009 - Ford Fiesta 2009 , unable to add fuel additive - Ben 10

Ford provide an independant plastic filler attachment to aid filling the special misfuel inlet. Most cars have them in the glove box. If you don't have one, buy one from a Ford dealer and this should help you use your Redex bottle again.

Ford Fiesta 1.4 Diesel 2009 - Ford Fiesta 2009 , unable to add fuel additive - MrEckerslikefromRamsbottom

First thing - I have found from experience that the use of the diesel treatment you mention makes not one jot of difference to the running of the car or to the chances of poor running due to injector fouling. The proper (and rather expensive) additives, with cerium, do make a difference to my pre-DPF car. If you car has a DPF and uses Eolys fluid, then that's really all you need. The Eolys fluid uses cerium oxide as the active ingredient and reduces the temperature at which the soot (diesel particulates) burns, giving a cleaner combustion.

But if you need to use an additive (and my 06 Fiesta has a more simple fuel flap. I haven't seen the type on your 09 car) then I would suggest fitting a wider, longer, length of pipe to your funnel (sorry, you say you've tried that), but I suppose it'll have to be a pipe of about the same dimensions as a fuel nozzle. How about a short piece of copper plumbing - say 22mm?