Dahl88

Hey folks.

I got my Xr3i 8v efi, with lambda and an kn kit.

It acts kinda weird so here goes:

When acceleration from 0, if the throttle is only ˝ way down (driven nicely) it get a little jumpy (a little) and a the same time the exhaust spruttels a little, sounds annoying.

When i floor it with the clutch pressed down it can fire in the exhaust (not a big boom, but you can hear it)

Also when i keep a stabile speed (100 km/t ex) and i only hold the throttle down gently (the same place) it starts to "jump", like it missfires? or something, sometimes its very small jumps that you can feel in the wheel and seats, and other time is powerful enough so shake the whole car.
And its kinda rough in idle, sometimes it idles 100% PERFECT and smetimes it idle like 900-1300 or keep around 1700.

Every time it gets laggy/jumping FLOORING it removes it, until I stop flooring it and drives normally again.

Any idear? theres NO leaks in the hoses, cant really be the sparkplugs either.

Lambda? Fuel pump? (its old and have been stucked before, but the fuel pressure was fine) maybe the sparkplugs cords, injectors, fuel filter? or just the ecu being a total bitch?

As a side note: If i drive it with the same throttle pos, while it accelerates it goes like its holding it self back. It wants to accelerate but like it not really want to anyway.

Anyway look at the curve.

THANKS. Sorry for my crappy english.

Cvh 8v LJB 102 HP Stock
Tuned with 2" simons ex system, cat removed, and kn kit added

http://img840.imageshack.us/i/dsc04596.jpg/
http://img836.imageshack.us/i/dsc04597.jpg/

Notice how uneven the curves are

clarke5700

cps or map sensor i would go for

Dahl88

Cps?

Yeah a mate of mine mentioned the Map sensor, but i can find a replacement anywere :/

Dahl88

So any other that got any idears? Map sensor aint cheap in Denmark im afraid