Bought an h reg xr3i mk4 last week had a look at it last night to see what the problem was .

It starts straight away but wont take full throttle have to gently press it and the revs go as far as 4 - 5k then it bogs down , its imposible to drive .

Had a search on other threads but couldnt find a solution .

So far i have changed the plugs and leads and a working coil pack from another xr2i and the fuel filter and the throttle position sensor and still the same problem .

the fuel pump sounds like its working unpluged the pump relay and it wont start at all .

Any ideas ? as its driving me up the wall ?