I am getting deeper

[Birmingham Bill]

My 1990 911 keeps going dead as I pull up to a stop sign, red light, etc. I have a guy that will work on it without losing a couple of rooms of my house and a small child. Although he is an excellent mechanic, he is not that familiar with Porsche engines. He needs to know what to change out. Here are the following guesses:

1. DME relay
2. Possible vacuum leak
3. Ignition coil and wires
4. Torque the manifold bolts down. Check the torque setting. I know on the carrera's it at 18 ft/Lbs
5. I was told there are 2-3 switches/relays that could be the problem, but I am not sure what they are called (any idea).
6. Head Temperature Sensor (located on cylinder head 3)

I know it is hard to diagnosis someone's problem without seeing the car, but I sure appreciate you trying. Thanks.

[tsuter]

Check here ...

I need your help

or here..

Switch Problems?

But the real question is why would you let someone work on your car who is not knowledgeable with Porsche???

[Birmingham Bill]

I saw the links, but everyone seems to have a different opinion?? To get a clutch, alternator and address the idle problem it will cost me over $3k at a certified dealer (I have priced it). If I can help in identifying the problem and tell the mechanic what to do, it will probably run around $1,200.00. I can take the money saved and put it aside for the next problem. I will either be very smart or stupid. Besides, if the mechanice doesn't do well - big deal. I will take the loss and learn from my lesson. I am just trying to avoid as much sting as possible and enjoy the car.

[Pingo]

Check the idle contol valve.

[VincentVega]

x2 on the idle control valve, cleaning it out might be all you need.

You really should have a spare DME relay on hand, cheap insurance.