Quote: "After SSIs: It now always starts, then dies right away. On the second try, it starts but runs really rough for a few minutes. If I try to give it gas, it will die. If I let it idle, I can feather the throttle to get the revs up after about a minute. After a few more minutes, I can rev it up, and it runs fine. When warm, it starts right up and runs fine."
That sounds like the symptoms my car suffered after being stored for nearly a year...
I emptied the tank and filled it with new gas, Performed a valve adjustment, Changed the oil, New dizzy cap and roter and checked the spark plugs.
My car ran 100% after that! I know installing the SSIs may seem like the obvious cause but...
Quote: "Then again, it's been sitting for about 3 months since I last drove it,"
That's not really long enough to get stale fuel problems but when was the last time you adjusted the valves or did a basic tune up?
To get the best mixture and idle adjustment you really need an O2 meter. Some people here have their own and use it regularly when performing engine mods tune ups etc. I intend to get one soon but I'm tossing up between a permanently installed one with gauge in the dash or a portable hand held one. (cheaper)
When I was much younger (44 now) I used to do lots of work on motor bikes. It was standard practice to re adjust the mixture whenever a new exhaust was fitted or a change was made to the intake. I'm not sure how that applies to Porsches but if it was me I would get it checked by either using my own O2 meter or taking it to a mechanic with Porsche knowledge... Hope it works out OK
