Peugeot 306 1,4 XN 1994

Hi.

(mind my bad english)
I've got some real problems with my 306 engine. (1,4 carburettor engine)
It all started some month ago with with the [K] lamp starting to light, with
no problems then...
A time after the engine startet to misfire a bit now and then..
Suddenly it started to misfire and run unevenly in all turns....worked all
right when I was driving strait.

I desided to renew the plugs and the plug-wire's.
It seemed to solve all of my problems...for a week.

Now, the engine starts ok, runs ok at idle.

Problem :

- when I step up the gas, the engine works fine for the first 5 mm of the
gas pedal (ignition is perfect within the first 5 mm part of the gas-pedal)
when the car stands still. When I should start driving the car(when the
engine gets more resistanse) it starts to run unevenly and as I passes
trough 5 mm when the car stands still(not moving), it misfire.. it's like
its only running one 3 cylinders. So at full throttle it misfire all the
time...
And, thats where I am now, I cant drive the car....I've got real problems
with acceleration...takes 1-2 min to build up the speed...but I can maintain
the speed....because of the first 5 mm of the gas pedal..

I have also changed the exhaust pipes inclusive the catalyst, because my
brother(a mechanic) thought it was a problem with (air) thight exhaust
pipes....

What could be the problem... any Ideas??? need more explanation, pleese
reply to med!!!!!

Thanks for all answers.

Thomas
Norway