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Join Date: Oct 2005
Location: Birmingham
Posts: 79
Porsche Crest I am getting deeper

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.

Old 10-12-2005, 07:07 PM
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tsuter's Avatar
 
Join Date: Dec 2002
Location: San Antonio, Texas
Posts: 1,642
Unhappy

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???
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tsuter
78 911SC Turbo Targa
Thaaaats Right!!
Old 10-12-2005, 07:27 PM
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Join Date: Oct 2005
Location: Birmingham
Posts: 79
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.
Old 10-13-2005, 08:58 AM
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Posts: 310
Garage
Check the idle contol valve.
Old 10-13-2005, 10:16 AM
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Join Date: Aug 2002
Location: MD
Posts: 5,732
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.

Old 10-13-2005, 10:23 AM
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