mikey89

iTrader: (1)

Well we are at an absolute dead end afather months of chasing fault codes we are non the wiser... So the problem we are having is intermittent and not all the time which is why we are stumped.... It when it idles its lumpy and want to stall but when you give it some revs it's fine?... Then returns to being lumpy but other days no issues?... And when you drive it its almost undrivable the car wants to die on you and a lack of power but if you accelerate at higher revs it's fine it's only at lower revs.. It seems to chug along almost lurching but other days it can drive absolutely fine with no problems running really well??...
Impreza 2.0 gx

We've changed a fair few parts already including:

Cam shaft sensor
Plugs and leads
Knock sensor
Second hand idle control valve
Crankshaft sensor

Diagnostic has shown these sensors and have been changed but hasn't shown up as a MAF problem

Any help is much appreciated and all ideas are welcome and if anyone's had the same issues what did you do? Thanks