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Join Date: Oct 2005
Location: Birmingham
Posts: 79
I need your help

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).

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

Old 10-11-2005, 05:11 AM
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AFJuvat's Avatar
 
Join Date: Feb 2001
Location: Viera FL
Posts: 5,642
Head temperature sensor. Located on cylinder 3 (left side of the motor, rear cylinder)

Bad DME relay: Car will not start
Vacuum leak: Car will run like garbage
Ignition: Same thing
Manifold bolts: Not likely

AFJ
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Old 10-11-2005, 05:16 AM
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Join Date: Oct 2005
Location: Birmingham
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Thank you so much. So, forget the vac and ignition and concentrate on the head temperature sensor?

Old 10-11-2005, 06:39 AM
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