First - huge thanks to this forum and especially to "kinderrich" !
A couple of weeks ago my Porsche couldn't start when the enginewas hot or even if the car stays under the sun --- at night, when it was cooler, it had no problem at all. I checked this forum for ideas what could be wrong and found "kinderrich" posts about the DME relay - which I replaced ( $30) and that fixed the problem ! Thanks so much !!!

Now, I would like to replace all of the fluids with the best available, could you please enlighten me what I need and where to get it from ?! Coolant, brake fluid, steering...etc...etc

 

Prestone makes a universal, mix with any color, safe for aluminum engines coolant. Mix 50/50.
Brake fluid, I use ATE Dot 4 or Super Blue (track cars), but Motul also makes a great fluid.
Oil: Castrol 20w-50 (non syn), or Mobil 1 15w-50 (synthetic)
Gear Lube: Depends on if you have LSD or not. Non LSD: Redline MT-90, Mobil 1 75w-90, or Swepco. For an LSD, redline you can use their 75w-90 IIRC, the mobil 1, or the swepco. It just needs to have the LSD friction modifier in it.
Power Steering: Any ATF Dexron III transmission fluid (does not use power steering fluid)

 

That's prime material for a faq.

 

Thank you Doc !
Next week I'll flush all the fluids.
Anything that I should know about spark plugs, wires, distributor cup and the rotor ?!

 

Nothing special. Use all stock parts, IE no need to run any special plug. These cars run best off a stock bosch copper spark plug. No platinum 4's.

Wires I would stick with either stock Beru wires, or get a set of wires from Clewett engineering, which are very nice, and about half the cost.

 

Hey PorscheDoc,
You can't imagine how helpful you are !!! Thank you soooo much !!!
What plugs would you recommend - I am little bit confused - Bosh WR 8 DS, or 7 ?! The manual says 8, but I have read on the Internet some people recommend 7 ! I would go with whatever you recommend !

 

What year? NA, turbo, S, S2, etc?

 

Sorry !
1985/1

The Porsche just stalled on me at a stop light. Couldn't start it for 10 minutes, but once it did, it runs smooth ! WTF is wrong ?! Could it be a sensor or may be the distributor cup ! It only happens when the weather is hot.

PS: It seems that now the car burns more gas than usual !

 

The starting issue is most likely a reference sensor, or the connections to that from the harness. The harness gets brittle over time, and the wires break inside the sheathing.

Use a WR8DS for the early cars.

 

Hey Doc,
Is it possible the speed sensor to be the problem ?! I gave my car to a garage to check it out and they say that the speed sensor is faulty. It will cost me $300 - to install the sensor, re-tighten the belts and full check up ---is this OK, or too much ?