GAG

hi all,
yet another question

i have changed to denso plugs, magnecore leads, changed fuel filter and air filter is good + im using v power. when im say in 4th doing 30mph, 3rd at 20mph 0r say 5th at 35mph if i try and put my foot down hard its almost like the power just goes and theres nothing there and it splutters a bit? as my car has done 90,000miles is this likely to be the fuel pump as i think it is still he orig. one . but as long as the revs arent low it pulls nice. im not labouring the engine but it shouldnt be doing this am i right in thinking that if your trying to pull in 4th at 30mph the fuel pump cant get the fuel through quick enough. it makes no difference how full the fuel tank is and ive used a few fuel additives to make sure the systems clean
any help would be great as it is driving me crazy.

RB5_245

Maybe incorrectly gapped, or wrong temp range plugs?