[Porschedave]

Hi
I agree with the above comments regarding air leaks. I had a crack in the airbox of my 83 engine. It probably began as small and over time got larger. When I finally discovered it and replaced the box I couldn't get the engine to start at all because the mixture was so out of whack. It had been adjusted and each time a bit more to account for the air leak.

A separate leak occurred when one of my intake runner boots cracked. That was a pain to find but when replace the car ran great. Go for the simple things first.

Dave