Hi Sharkbonboh, it’s a subject close to my heart, if it’s happening exiting bends / roundabouts and under hard revs but seems fine if you stop for a minute then in my experience it’s likely to be debris in the fuel tank, I have done a few of posts on here about it with quite a lot of detail but here’s a potted version, my car was stood for 11years without use then fully recommissioned, after a while it started cutting and missing at higher revs and eventually upon exiting bends and roundabouts, I tried changing cam and crank sensors but no joy, ran petrol down to empty ( it’s surprising how far is left even with the needle below empty, and with the needle on the empty mark there is about 7/8 litres of fuel left) whilst having a 5 litre emergency container in the boot and put just enough in to get home, undo the petrol filler cap to relieve the pressure, remove the 5 carpet retainers behind the seats and roll/fold back the carpet on the parcel shelf, remove the 6 screws from the large inspection cover, remove the 2 fuel pipes by pinching in the clips, remove the electrical connector by pinching in the clips, remove the 6 screws from the pump plate and lift the assembly out of the tank carefully and avoiding damage to the float assembly, have a tea or coffee break but not a cigarette check the pick up filter for crud and clean with a nail brush and washing up liquid, remove any remaining fuel with a clean jam jar or similar (you will now appreciate having run the tank to near empty…don’t ask:smirk:) finally dry bottom of tank with rag and remove any debris you can any way you can, leave overnight to evaporate dry overnight, next day run hand all around inside of tank as far as you can to displace any rust powder you can, hoover out any remaining debris from bottom of tank being sure to get debris out from under the baffle plate with a rag / straw brush /whathaveyoy, when sure all is as clean and dry as possible, refit components and fill with what’s left of the petrol start engine and test drive, if all is good then great, BUT for me the problem returned after about 100 miles (I only put about £25 of fuel in just in case) don’t dispare just go through it all again as I did! The second time I did it I used cable ties to raise the pick up filter by 23 mm so that I can get a couple of tankfuls of fuel used up to hopefully dislodge any remaining debris and then I will do the job again and repeat until I’m sure all is clean, at that point I shall remove the cable ties from the pick up filter and also replace the inline filter.! I’m sure you will have an addled brain reading all of that but if you decide to go ahead iwould write it down as series of actions, it’s all actually pretty straight forward and self explanatory once underway, do check first that your model doesn’t have a petrol drain plug as that would make life easier for you, have fun and good luck, any questions please ask and keep me updated.
Kind regards Dave.
Ps I’m a MK2.5 so yours may be a bit different but I would think the principal would be the same.
PPS initially I removed about a large mugful of gritty and powdery rust.