Every now and again the car will bog down as accelerating. Now I don't feel as though this is a boost related issue as I've had plenty of things like this replaced overtime and after logging last week the figures are great and don't ressemble this and it definitely isn't in limp mode. But i feel as though the car has always had this bogging down issue (been worse in the past at times). From this I have pinpointed necessary fuel related parts which could be causing issues; > Fuel Pump (inside tank) - £215+VAT > Fuel Pump (lad at Audi said there is an exterior tank pump?) - £n/a > Injectors - £108+VAT 'each' > Fuel Pressure Regulator - £72+VAT > Fuel Filter (have one sat at home) - £n/a Now those prices are quite high and don't wanna pay out when it may make no difference but I have some of this I bought not very long ago and I'm wondering whether to give it a go before forking out cash; I certainly don't think it's the Spark Plugs or Oil Packs either as theae would vertainly throw up more issues. Any advice is much appreciated cheers!