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Yes the interior is much better with the black contrast, I’m planning to change the dial faces to black too (those silver ones
are not genuine Porsche and the lights are hard to see in daylight.
I quickly cleaned the interior but it still needs a deep cleaning of the leather.
i really like the red now.
Wow. I don't know how I've missed this thread, but kudos to you for resurrecting such a nice car! With your impressive DIY ability, I'm sure you'll enjoy owning this one!!! Congrats on getting it rolling again.
Getting Hot in Europe this weekend, so I decided to take a look at the climate control.
The only thing that is working is the blower motor speed control.
The defrost-flap is fixed in open position and also the temp mixer flaps in open positions.
So I'm only getting hot air out of the climate control.
I started with reading the ECU's DTC's:
When I looked to the schematics i found out that all these sensors (and mixer positionsensors) are sharing the same sensorground and 5V DC sensor power source.
So i figured that if this voltage was not present, all these DTC would be caused by the same defect.
So I measured the voltage between pin 1 en 2 at the defrost flap motor, but to my surprise the 5VDC sensor power was present.
So now i have to check all these sensors if they are faulty or not.
Before I decided to remove the ECU i desided to take a look to the 2 mixingchamber temp-sensors.
They are easy to access and after removal the defect was very obvious, the sensor wire is broken(in the housing) in both sensors.
The Porsche repair sensors costs about 250€ for one sensor, so 500€ for both sensors, pfff thats a lot of money for 2 sensors.
When I looked in the schematics the resistance-temp. valuaes are stated as 12,5Kohm at 20°C and 4,4Kohn at 45°C.
So thats a NTC temp-sensor.
As a refrigeration technician these values came a bit familiar, and i looked at the values of the sensors i daily use in commercial cold rooms and freezers.
Gues what?..... the values are almost identical, see graph below!
If you want to know what these sensors costs, I sell these sensors to my customers for €12,- each, so 24€ for 2 sensors!
So for €476,- less then those from Porsche you have sensors with quality for use in proffessional refrigeration.
I have those sensors on the shelf, so i decided to give it a try.
I had to use the dremel to make a bit more room for the sensor at the front, and i used some 2K glue to secure the leads at the top.
After fitting the sensors on the 993 and soldering the wires, this is the result:
Sensors are working perfectly.
2 DTC's down, and still 4 to go.
To be continued......
This thread keeps getting better. That circuit board was a real mess. The AC Fix for 24 euros. Fantastic.
Thanks, but the AC is not completly fixed yet.
Last night i checked the outside temperature sensor and the left temp mixer flap.
Both parts are missing.
thats a problem with cars that are standing in a corner for a decade, they get used for donorparts. If the owner needs a part for an other porsche its easyer and cheaper to take it from a car you allready have, so you don’t have to buy a new part.
Thats why i have so many defect or missing parts, or parts that don’t belong to the car like the ABS computer a few posts ago.
The parts are ordered, but my regular parts suplier just came back from a holliday, and it's verry busy at his shop.
So wile waiting for the parts decided to test the AC system, because i would realy like this to work with the hot summer days.
I Pressure tested the AC system with 10 bar of nitrogen (N2) and discovered there was a leak.
After some searching with leak finding spray i found a leak at the sealing rings of the thermostatic expansion valve.
I replaced the rings.
As you can see in the picture below, the old rings have become triangular and don't provide enough pressure to the seating of the joint for a propper fitting.
The rings should be round like the new yellow ones. only use special rings for AC systems as R134a and the oil will eat your rings if you use standard rings.
After replacing the rings i pressure tested again and i have no leaks anymore, i got lucky this time.
So next i evacuated the AC system and filled 840grams R134a with my Robin air servicestation.
I know being a refrigeration technician has its privileges, if your not you probaly don't have the ability to buy refrigerant.
And i am heaving cold air!
Ok the heating does not work because of the ordered parts, but i have AC for now
PS: I know i should have put the nitrogen cilinder flat to the ground for safety reasons. it's dangerous for having it standing upright. but i actualy only applied the presure on the system while holding it, and only taking a quick step back to take the picture.
Last edited by Gert 993; Aug 8, 2020 at 11:36 AM.
Reason: adding picture
Last few months i replaced the rear bumper, repaired the cruise control, the Interior lights, and i rebuild the pedal assembly.
I also had a alarm installed and i deeply cleaned the leather.
i found a rear turbo bumper as good as new on the internet, and dropped it at the bodyshop for repainting.
all the old painting has been stripped, They applied new primer and a fresh paintjob.
All the old painting has been removed and the bumper has new painting primer
Fresly painted
All new trims and brackets are mounted
New Rear bumper
The Interior light problem was caused by problems in the wiring, i fixed the supply and replaced the boot en engine compartment lightunit and then there was light!
i also discovered that my clutch pedal die not return all the way. There is some play on the pins and slots of the spring assembly. I replaced all worn parts and added new pedal rubbers.
Old vs new parts Rebuilded pedal assembly Pedal assembly mounted and adjusted.
I adjusted the clutch switch and I replaced the steering column switch because the cruise control stalk was missing. After test driving all went well, I now have a perfecty working cruisecontrol. This week I had a certified alarm installed because insurance does not accept the factory Porsche alarm, and I also liked to have a keyfob to control the central locking. My car did not have the Porsche immobilizer with keyless entry. Now I do with the certified alarm. I have no pictures of the alarm because of security reasons.
Yesterday I cleaned the leather, I was surprised by the amount of dirt that came off, so I taped a part of the seat to make a comparison old vs cleaned.
and I cleaned a part of the center of the seat.
After finishing all the seats this is the result
Last edited by Gert 993; Nov 22, 2020 at 05:02 PM.
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