[16vCorey]

So my '84 944 sat for a couple of years. It was parked because it had a leaky head gasket. I had a spare head, so I had it resurfaced and rebuilt it so it would be ready to go for when I decided to change the head gasket.

I swapped heads a couple of weeks ago and everything was working fine for about a week. Ever since then, it's had a really bad miss that happens sometimes under throttle, and every time I shift until it warms up. The really weird part it, when it starts to miss, it's losing compression. If it dies while it's missing, when I restart it it sounds like it's got a bad timing belt until it builds up compression and starts.

I've checked all the ignition components and they're fine. I did a compression test (cold) and I got 168, 170, 174, 175, so I don't think that's the problem. When it does it, it just randomly drops a cylinder (or sometimes two). I don't think it's fuel washing the cylinder out, because once it builds up compression again it doesn't smoke at all.

The only think that makes sense to me is if a valve or lifter is sticking. And if it is, why did it wait a week to start sticking?

Any other ideas?