my classic impreza is running a bit lumpy the now seems to running a bit rough under 2000rpm as if its dying when feathering the throttle but when u accelerate it jerks a bit then takes of an runs fine when you stop it idles quite low but it seems to come and go its not all the time has any body got any ideas? nothing comeing up on diag check just changed the plugs aswell ?

 

Coolant temp sensor.
MAF
Coilpacks.

If on codes are coming up, then possibly coilpacks - but wouldn't think so. Does sound more like MAF or CTS.

 

i put 4 new coils on it about 6 months ago i changed the maf last week and its still t
the same

 

Typical!

Brand new coils from a specialist/dealer at abot £65 each?
Brand new, or 2nd hand, MAF?

Well the good news is that a CTS is only about £30 (plus plugs are similar money - can get uprated 7B's on ebay for about £20 these days...)

 

ye new plugs the other day the maf is second hand the coils are brand new

 

Well for £30 get a brand new CTS and see how you get on.

If no luck, then it still could be MAF (or something else obviously ).

 

did it do it afore yo ufitted the new plugs?
...might be wrong gap ?

 

ye it was i thought it was the plugs but exactly the same after i changed them its weird how doesnt do it after 2000rpm its idling about 500 rpm its like a mad splutter when you feather the throttle give it gas then it has a we jerk then takes of its a nightmare if your stuck in traffic where can i get a temp sensor?

 

Local Subaru dealer. Or try specialists like API, Zen, RCM, etc etc...

 

took the car out earlier on when you put the clutch in its just about dying it seems to be hitting over boost aswell will temp sensor cause this as well?

 

and the odd we back fire aswell? anybody?

 

just noticed my alarm is playing up an all everytime i lock it it keeps goin off it hasnt done that in the 13 months ive had it