SVT running but only just
I have just replaced my head gasket and put the car all back together and it will start and run but only just. I have to keep the gas pedal pressed or the car will just cut out.
I replaced the water pump, serp belt, timing belt, both tensioners, plugs and wires while I was there
I'm getting 1518 and 1520 codes on the OBD.
I was getting the 1520 before the gasket blew so I don't think that's what's making it run so rough but I don't know for sure.
I'm not sure where to start diagnosing this so hence this post.
What would be the best way to fault find this?