I've started to notice the last couple of months that i seem to lose power between 3.5 - 4 k revs its very noticeable in second gear and feels like im letting off the power. Any ideas? I've had new plugs, leads & fuel filterrecently.It seems to be getting worse & justfeels like the whole thing is slowing down. I have tried the fuel line/injector cleaners & nothing else is out of the ordanary.The car, well its the slow one 1.5EG hatch non v-tec(think its the D15) uk spec. Thanks

 

check into your o2 sensor might be going out. worth a shot