Car: 98 Impreza Outback Sport 2.2
Hey guys, I recently had the timing belt tensioner pull out, threads and all, dropping the timing belt, causing the valves to smash into the pistons. So, I pulled the car apart, went to the local pick and pull, found a 93 legacy with a 2.2 gen 1 with dual port heads. Said screw it, grabbed them, and the header, slapped it all together with all new gaskets etc... Now the problem I am having is, when the car is warm, not only when hot, just even luke warm or having been started a few hours ago, enough to not cause the idle to raise due to it being cold outside, right after initial start, it will die. If I rev it up a little (1-2 seconds) after starting, it'll come back down to proper idle, as it should. I am also noticing the idle being a LITTLE low normally. So, as long as I just give it a little rev after starting, it'll idle fine (smooth) for however long the car is running for, stop lights, whatever, no problem. It didn't do this whatsoever before swapping heads, so maybe one of you guys could throw me a bone here as to what it could be. I have NO vacuum leaks, new PCV hoses, and a new air filter. The only think I can think is, it's mad at me for going from single port heads to dual port heads?? I have no idea. Other then the start up idle issue, the car runs GREAT!
Oh, just for fun, I should add that the car has 248k on it, and when I had the heads off, I examined the cylinder walls, and the top of the pistons. The cylinder walls were IMMACULATE, no scoring, beautiful crosshatching, and the top of the pistons had a LOT of carbon build up, which I cleaned up a little.
Edited by Ditch64, 17 February 2014 - 04:52 PM.