Wilkeasy

I must say thanks a lot for the link for the manuals with all that information I'm sure I'll now be able to figure out the problem. Many thanks

Sorry I have not replied sooner I never knew you had messaged as I didn't get an email lol My ECU is a 3H 22611 AF633 I have not tested or replaced the coolant temp sensor, how would you recommend I do this by checking the resistance in some warm water obviously disconnected from ecm and what pins would you use ?? Also the ECU is reading like 20 degrees which I would suspect it to be ok. It is out of an Impreza and is SOHC I have ordered a new IACV but is a cheap one and most likely be the correct one as the seems to be so many different tyres Nd import car part don't do the one I need apparently.

Ok so I don't have a Subaru but I have a VW Subaru converstion with an y reg ej20 n/a. No maf sensor. Anyways this thing doesn't bloody start when the coolant temp sensor is connected. And when I disconnect it and start fires up and then will not idle and cuts out. No faults in ecm the coolant temp is reading what would be expected. Adjusted the TPS with volt meter. Does any body know how the idle valve is supposed to get hot when just the ignition is on. I don't want to just parts canon it,trying to diagnose it correctly 1st time. Many thanks