GRNGBLN

Hi, to start, my car is a 2004 Impreza 2.5TS 5MT with a 2000 Impreza L phase 2 EJ22 in it. To complete this swap, I transfered the intake and exhaust manifolds with any sensors and such associated, as well as the cam and crank sprockets. While the EJ222 was out, I replaced the valve cover gaskets and timing belt. I had a hiccup when getting it started that I didn't swap the cam and crank gears, so I had to go back in to do that, and when I fired it up, it would not go lower than 4000rpm, sometimes up to 5000 and I shut it off before I can see if it will go any higher. I tried cleaning the IACV which didn't help, followed by replacing it, which brought my rpm down to about 3000, before climbing right back up to 4500 a couple seconds later. I am getting codes P0519 AND P0113 currently, although the airbox and thus, IAT sensor, are not currently attached. Anyone have recommendations on what would be causing this ridiculously high idle? Thanks.

I have now replaced the crank and cam sprockets and the motor started right up. The only problem is it idles at 4000rpm and I have code p0519. Anyone able to provide insight on where to start with this? Thanks

I'm going to be taking a further look at it next week. I got the car to fire up for maybe a second before dying, and other attempts it would backfire while sputtering. I am waiting on new intake gaskets for it which is going to be my first approach. With the swap I had to use the plastic ej251 manifold, but there was no availability on the ring gaskets that are seated into it. As an interim to at least get the motor together, I opted to try the flat metal gaskets meant for the ej222's metal manifold. If this doesn't work I will open up the timing cover to check the sprockets. Any specific giveaways to tell what I'm looking for? I'm reasonably mechanically inclined but far from an expert. Thanks for the reply

Hey guys, new to posting here and searched for threads but can't find my exact same problem. I have a 2004 impreza 2.5 ts that I swapped a motor from a 2000 impreza L. Mounted the exhaust manifold from the 2.2L and the intake manifold from the 2.5L. Only part not installed yet is the air box, so it's open from the throttle body. Got all the wiring hooked up, engine cranks and there is a noticeable smell of fuel, but it won't run. Haven't tried much as I went home for the day right after this. I'm just curious if anyone has done this and experienced similar issues or knows a possible solution. Thanks :)