[Franks89-911]

FWIW - I inherited my Dad's 89 911 about 2 years ago. The service he did was spotty at best. From what I could reconstruct, he had replaced the spark plugs, dist cap and rotor only once in 26 years of ownership, and done a few oil changes. Wires were never replaced. When I got it and started driving it, it ran rough and stalled out on me a couple of times.

So I dived in on the simple things, myself: changed the oil and filter, changed spark plugs, spark plug wires, distributor cap and rotor. Got alternator rebuilt so that I had 14v going thru the car, not 10v from a dying & uncharged battery.

Point being, after doing those simple things, she runs like a dream now. Roars to life at every turn of the key - "drive me" she says. Ockam's Razor: sometimes the simplest explanation is the right one. Start with the simple things that make the engine go and see if that fixes your issues, before spending thousands replacing every "sensor" or relay - those may not actually be bad. At least test them yourself first. Lots of Porsche mech's out there only too willing to part you from your money because the car won't run and we're scared because it's German and say "I don't know why it won't go, just fix everything Hans, I don't care what it costs". I'm not afraid of doing work on the P-car like I used to be. (A $2500 mech bill cured me of that fear).