impreza 1997 2 litre ej20

[kevinshaw]

been having problems with it starting   and when i do  get it running  keeps cutting out untill its warmed up 

yesterday {very cold} i couldn't get it started at all 

back fired twice   sounds like it wants to start but then nothing 

{engine is actually in a vw type 2 bay }

any help much appreciated 

[savage bulldogs]

Are you running the stock ECU?

If so you might be able to use the ECU self code check function. 

If not I'd start by cleaning the idle control valve/maf and clean n re gap the plugs .