just purchased 928, after 944 and 924s
05-23-2005, 04:57 PM
#1
Drifting
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just purchased 928, after 944 and 924s
I've been on Rennlist for several years, since I bought by 85.5 944. I bought an 88 924s in January (which is now for sale) and just sold my 944 a month ago.
I just got a good deal on a 90 928 s4. I absolutely love this car! Of course, I have a few questions.
1. I've attached a picture of the passenger side. I'm going to drop the car off at a body shop to repaint the door, but I wonder if anyone knows what happened to the paint. I thought maybe it was replacement door, or respray, but the entire door and door jam is also discolored.
2. This car has the extra leather interior, so the rear interior quarters in back seat and hatch are leather. They have shriveled and curled from the sun and I'd like to replace them. Does anyone know of an affordable source for these 2 pieces?
3. On the digital dash, it flashes the messages, traction control off, and tire pressure off. Can this monitoring/control be enabled, or are they an indication of a problem?
4. The left back up light does not operate, both bulbs work on the the right side, so it is obviously the socket. All other lamps work, I believe. Any hints on tracking down the solution to this?
5. How hard is to pull the intake and cam covers to refinish them? What parts would I need to do this job, ie gaskets, bolts, etc?
6. The belly pan is missing? Should I replace this and why?
7. Could anyone use the cellular transceiver/receiver that's in the bottom of the hatch? I'm not going to use it.
8. One of the D90 rims has been curbed and is nicked up. Can this be repaired, or should it be replaced? Anybody got one for sale?
9. Anybody know a source for 2-ohm speakers? I'd like to replace a few of the 10 that are in this car.
10. Anyone want to buy my 924s? Ad is in classifieds.
Thanks in advance for any help and advice.
I just got a good deal on a 90 928 s4. I absolutely love this car! Of course, I have a few questions.
1. I've attached a picture of the passenger side. I'm going to drop the car off at a body shop to repaint the door, but I wonder if anyone knows what happened to the paint. I thought maybe it was replacement door, or respray, but the entire door and door jam is also discolored.
2. This car has the extra leather interior, so the rear interior quarters in back seat and hatch are leather. They have shriveled and curled from the sun and I'd like to replace them. Does anyone know of an affordable source for these 2 pieces?
3. On the digital dash, it flashes the messages, traction control off, and tire pressure off. Can this monitoring/control be enabled, or are they an indication of a problem?
4. The left back up light does not operate, both bulbs work on the the right side, so it is obviously the socket. All other lamps work, I believe. Any hints on tracking down the solution to this?
5. How hard is to pull the intake and cam covers to refinish them? What parts would I need to do this job, ie gaskets, bolts, etc?
6. The belly pan is missing? Should I replace this and why?
7. Could anyone use the cellular transceiver/receiver that's in the bottom of the hatch? I'm not going to use it.
8. One of the D90 rims has been curbed and is nicked up. Can this be repaired, or should it be replaced? Anybody got one for sale?
9. Anybody know a source for 2-ohm speakers? I'd like to replace a few of the 10 that are in this car.
10. Anyone want to buy my 924s? Ad is in classifieds.
Thanks in advance for any help and advice.
05-23-2005, 05:21 PM
#2
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Wel, first of all, congratulations! Is this a '90 or '91? Auto or Manual? You should always include this info when askinf questions, just in case...
About the belly pan: I recommend doing a search here for belly pan, and you can find gazillions of reasons why you should have it, and just as manybelievers who think you don't. I strongly feel you should have one. There are nice aftermarket ones made from metal - these last longer than the brittle plastic ones from the factory. If you get the metal type, you need to find yourself a pair of the air ducts that come with the factory type.
The paint on the passenger door - who knows... might be a cheap repaint. Usually you can see, if it is a replacement, when you remove the door panels and compare the two sides.
It's hard to find good leather interior panels for the 928, as most have similar damage as yours. Get a quote from a local upholstery shop who works on Porsches and can match the color. I've heard the main cost is in removing and replacing the panel - recovering is not too bad. If you can do the R&R yourself you might be looking at only $300-400 or so and have them like new. Some owners replace the leather with vinyl to avoid future shrinkage.
Design 90 are not very popular, so you should have an easy time finding a used rim that 's still decent - except for the rear. These rims stand out beyond the tire and scratch easily on curbs. Ask the guys at 928 International or DEVEK, if they have one in the size you need.
Hope this helps. Best of luck!
About the belly pan: I recommend doing a search here for belly pan, and you can find gazillions of reasons why you should have it, and just as manybelievers who think you don't. I strongly feel you should have one. There are nice aftermarket ones made from metal - these last longer than the brittle plastic ones from the factory. If you get the metal type, you need to find yourself a pair of the air ducts that come with the factory type.
The paint on the passenger door - who knows... might be a cheap repaint. Usually you can see, if it is a replacement, when you remove the door panels and compare the two sides.
It's hard to find good leather interior panels for the 928, as most have similar damage as yours. Get a quote from a local upholstery shop who works on Porsches and can match the color. I've heard the main cost is in removing and replacing the panel - recovering is not too bad. If you can do the R&R yourself you might be looking at only $300-400 or so and have them like new. Some owners replace the leather with vinyl to avoid future shrinkage.
Design 90 are not very popular, so you should have an easy time finding a used rim that 's still decent - except for the rear. These rims stand out beyond the tire and scratch easily on curbs. Ask the guys at 928 International or DEVEK, if they have one in the size you need.
Hope this helps. Best of luck!
05-23-2005, 05:29 PM
#3
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A PO may have simply disabled the tire pressure monitoring system. Don't know if it's also possible to do that with the traction control system, but I'd imagine it is.
A lot of folks are bugged by the tire pressure monitoring system. I have found mine to be very finicky. It actually requires my tire pressures to be a bit higher than factory recommendation. I have to inflate my tires to 38 psi or else I get a warning light. Many owners like their tires at 36 psi. So to avoid the nuisance of always having the warning glaring at you, they disable the system.
A lot of folks are bugged by the tire pressure monitoring system. I have found mine to be very finicky. It actually requires my tire pressures to be a bit higher than factory recommendation. I have to inflate my tires to 38 psi or else I get a warning light. Many owners like their tires at 36 psi. So to avoid the nuisance of always having the warning glaring at you, they disable the system.
05-23-2005, 06:21 PM
#5
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Originally Posted by sweanders
Devek has wheels and belly pan for you, and anything else you want or need. 
Congratulations on interesting career move. 
05-23-2005, 06:29 PM
#6
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Originally Posted by Vilhuer
Anders, you learn quickly. Congratulations on interesting career move.
Congratulations on interesting career move. 
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05-23-2005, 10:44 PM
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Hi Brett
Do you also get an ABS off message? The Tire Pressure sensing system (RDK) is not related directly IIRC to the traction control system (PSD). You may have two separate faults. But, it is possible that both faults could be due to the same cause since the signals for the systems originate close to each wheel. Does the digital dash give you any indication of a particular wheel?
There has been some discussion of the RDK system. Do a thread search for RDK in the title. Also the same for PSD.
Search for powder coating. Removing the intake and cam covers, prepping for powder coating, cleaning-up after powder coating, and re-installing the covers and intake will take 25-35 hours of time to do the job correctly. (The variability is due to model-year differences and general state of the engine bay e.g. seized bolts, dirty engine, removal of excess powder coating, etc.) However, there are a lot of WYAT things that can/should/might be done once the top has been pulled off the long block that can add considerably to the time and expense:
- replacement of all under-intake rubber and gaskets (hoses, elbows, 4 gaskets, 10 pressure gaskets, etc.)
- replacement of all cam cover rubber (2 gaskets, 26 rubber bolt gaskets.)
- replacement of oil filler neck gasket
- coolant crossover gaskets (prime candidate for powder coating as well)
- checking/setting cam timing
- cleaning head oil check valves
- checking/replacing cam chain tensioner pads
- fixing any worn insulation on under-intake harness connections
- cleaning grounds under intake at engine rear
- replacement of knock sensors
- upgrade head breather system to GTS spec.
- check operation of WOT/idle switch
- clean and balance injectors
- check condition/replace Hall sensor
- check/clean/replace idle stabilizer
- plugs, wires, (rotors, caps)
928 Specialists has various parts kits available for these procedures.
A comprehensive parts list depends upon how deep you want to go. I would expect the Full Monty to run close to $1500 in parts plus or minus the cost of powder coating. (The full intake kit is ~$500 without the upgrade to GTS spec). Powder coating typically runs in the $400-500 range.
It's a lot of work but the results of the Full Monty are always impressive. Below are pictures of my '89 GT and 928andRC51's so-to-be-finished '87.
Originally Posted by Brett Jenkins
3. On the digital dash, it flashes the messages, traction control off, and tire pressure off. Can this monitoring/control be enabled, or are they an indication of a problem?
There has been some discussion of the RDK system. Do a thread search for RDK in the title. Also the same for PSD.
5. How hard is to pull the intake and cam covers to refinish them? What parts would I need to do this job, ie gaskets, bolts, etc?
- replacement of all under-intake rubber and gaskets (hoses, elbows, 4 gaskets, 10 pressure gaskets, etc.)
- replacement of all cam cover rubber (2 gaskets, 26 rubber bolt gaskets.)
- replacement of oil filler neck gasket
- coolant crossover gaskets (prime candidate for powder coating as well)
- checking/setting cam timing
- cleaning head oil check valves
- checking/replacing cam chain tensioner pads
- fixing any worn insulation on under-intake harness connections
- cleaning grounds under intake at engine rear
- replacement of knock sensors
- upgrade head breather system to GTS spec.
- check operation of WOT/idle switch
- clean and balance injectors
- check condition/replace Hall sensor
- check/clean/replace idle stabilizer
- plugs, wires, (rotors, caps)
928 Specialists has various parts kits available for these procedures.
A comprehensive parts list depends upon how deep you want to go. I would expect the Full Monty to run close to $1500 in parts plus or minus the cost of powder coating. (The full intake kit is ~$500 without the upgrade to GTS spec). Powder coating typically runs in the $400-500 range.
It's a lot of work but the results of the Full Monty are always impressive. Below are pictures of my '89 GT and 928andRC51's so-to-be-finished '87.
05-24-2005, 02:15 AM
#10
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#2 Try Leatherique first. www.leatherique.com I use it on old dry leather with very good results.
#3, is the message Tire Pressure Off? or is it Tire Pressure Loss? Try the obvious first, check the air pressure. The PSD can be more involved. Tell us what else is on when the car first starts, before rolling, and then what is on after you roll off? ABS sensors can come into play, and will also affect RDK.
#9 Forget the two ohm speakers. You might get them from Porsche, but it's better to trash the amp, and redo the power section of the stereo with something else, including new speakers. Lots of posts on the forum regarding this.
#5 It's significant job, and as someone else said, there's a bunch of while you re in there items to take care of once it's apart. Really helps the look of the engine, but it's cosmetic mostly.
#6 Belly pan, many are missing. From what I've heard, it's important to have on the car above 140MPH to help keep the car stuck down in front. It also would seem to improve fuel economy, but it's not visible, and is easily damaged or torn off if replaced. The big 3 sell aftermarket units in Aluminum that would be better than the stock unit.
Doc 90GT in resto
#3, is the message Tire Pressure Off? or is it Tire Pressure Loss? Try the obvious first, check the air pressure. The PSD can be more involved. Tell us what else is on when the car first starts, before rolling, and then what is on after you roll off? ABS sensors can come into play, and will also affect RDK.
#9 Forget the two ohm speakers. You might get them from Porsche, but it's better to trash the amp, and redo the power section of the stereo with something else, including new speakers. Lots of posts on the forum regarding this.
#5 It's significant job, and as someone else said, there's a bunch of while you re in there items to take care of once it's apart. Really helps the look of the engine, but it's cosmetic mostly.
#6 Belly pan, many are missing. From what I've heard, it's important to have on the car above 140MPH to help keep the car stuck down in front. It also would seem to improve fuel economy, but it's not visible, and is easily damaged or torn off if replaced. The big 3 sell aftermarket units in Aluminum that would be better than the stock unit.
Doc 90GT in resto
05-24-2005, 11:24 AM
#11
Drifting
Thread Starter
Thanks for all the info so far.
It's a 90 s4 automatic.
When I 1st turn the ignition on, it says differential controll off and then tire pressure control off, no mention of ABS.
I got 2 body shop quotes yesterday on the door. 1 shop wanted to strip the door to bare metal and redo it completely. 1 wanted to sand the door and respray it. Of course shop #1 was significantly higher. Aren't these panels galvanized and treated by the factory? If I go the route of shop #1, does anything special need to be done in the process for they job to be done correctly and and long-lasting?
It's a 90 s4 automatic.
When I 1st turn the ignition on, it says differential controll off and then tire pressure control off, no mention of ABS.
I got 2 body shop quotes yesterday on the door. 1 shop wanted to strip the door to bare metal and redo it completely. 1 wanted to sand the door and respray it. Of course shop #1 was significantly higher. Aren't these panels galvanized and treated by the factory? If I go the route of shop #1, does anything special need to be done in the process for they job to be done correctly and and long-lasting?
05-24-2005, 02:32 PM
#12
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[QUOTE=Brett Jenkins]Thanks for all the info so far.
It's a 90 s4 automatic.
When I 1st turn the ignition on, it says differential controll off and then tire pressure control off, no mention of ABS.
QUOTE]
RUH_ROW! The ABS sensors on the back are used partially to determine if one of the rear wheels has lost traction, and to engage the PSD if other parts of the circuit are working properly. But, since the ABS warning light comes ON when you turn the KEY, then goes OFF after the car STARTS(right?), the problem is likely elsewhere.
Try this test, and record the results:
Key off, wait 2 minutes. Parking brake off (not set) Key to on but NOT start, wait 30 seconds and record what indicators are illuminated.
Key start the car, but do not roll or move. Record indicators on. Press, release brake pedal, any change in indicators?
Clear all warning messages in the annunciator by pulling toward you and down. Roll forward in a straight line for at least 100 feet, record any changes.
You may want to disconnect the battery for 30 minutes to reset your controllers to a base setting. This will also reset your LH/EZK to learn mode, so there is some small risk involved. If you have the stock Blaupunkt radio, you will need the code to make it work again.
Let us know the results,
Doc 90GT in resto
It's a 90 s4 automatic.
When I 1st turn the ignition on, it says differential controll off and then tire pressure control off, no mention of ABS.
QUOTE]
RUH_ROW! The ABS sensors on the back are used partially to determine if one of the rear wheels has lost traction, and to engage the PSD if other parts of the circuit are working properly. But, since the ABS warning light comes ON when you turn the KEY, then goes OFF after the car STARTS(right?), the problem is likely elsewhere.
Try this test, and record the results:
Key off, wait 2 minutes. Parking brake off (not set) Key to on but NOT start, wait 30 seconds and record what indicators are illuminated.
Key start the car, but do not roll or move. Record indicators on. Press, release brake pedal, any change in indicators?
Clear all warning messages in the annunciator by pulling toward you and down. Roll forward in a straight line for at least 100 feet, record any changes.
You may want to disconnect the battery for 30 minutes to reset your controllers to a base setting. This will also reset your LH/EZK to learn mode, so there is some small risk involved. If you have the stock Blaupunkt radio, you will need the code to make it work again.
Let us know the results,
Doc 90GT in resto
