Home | Contact Us | FAQ | Search & Site Map | Link to Us
Sign In | Join | Other 45 Sites in Network
HomeAnnouncements
Discussion Groups
By Brand
BMWChevroletDodgeFordGMHondaLexusMercedes-BenzNissanPeugeotToyotaVolkswagenOther Brands
By Topic
4x4 CarsRVsDrivingMaintenance & RepairCar AudioCollectible Cars
Country Specific
Australian ForumsUK Forums
ArticlesAuto InsuranceBuyingCars & TechnologyMaintenanceMiscellaneousSafety
DMV Resources
Related Topics
MotorcyclesBoatsMore Topics ...

Car Forum / Porsche / Porshe 944 / April 2006

Tip: Looking for answers? Try searching our database.

1978 924 Brakes

Thread view: 
Enable EMail Alerts  Start New Thread
Thread rating: 
Paul - 25 Apr 2006 02:13 GMT
When I bought the car I was informed that all the brake lines and brakes
were replaced, but the master cylinder was bad.  So I ordered a master
cylinder, and attempted to put it on.  When I did, the rear pressure sensor
disintegrated into it's plug.  the plug appears to have been shorted out
and melted, although it could be silicon from the sensor being eaten into
it by the leads rusting.  I ordered and replaced those, and put the system
together, although if the rear sensor is working is anyones guess.  The
brakes were still soft.  Next I power bled the brakes, and they stiffened
up a bit, but when I applied power, and started the car, the brake warning
lamp came on immediately.  The brakes held the car, but were still soft.
The brake lights still do not come on.  I bled the back brakes again, after
a short run in it, and this stiffened them up more, but still no lights.  
I guess the question I would have is whether these cars are hard to get bled
properly.  Also what pressure should I use the power bleeder at?  I used
about 13 psi with it.  Is there a way to check the function of the pressure
switches short of the lights coming on?  It really seems like a finicky
system if the rear brake lights cut out at the slightest pressure
fluctuation.

I hope I have given enough details.

Thanks,
Paul.
Signature

Email is bogus.  Email to:
p Sorah circle at mutual data period com(ercial)
no spaces, and the usual punctuation where indicated.

Honest John - 25 Apr 2006 08:11 GMT
Your skills as a mechanic sound as good as your judgement in buying a decent
car.

> When I bought the car I was informed that all the brake lines and brakes
> were replaced, but the master cylinder was bad.  So I ordered a master
[quoted text clipped - 23 lines]
> Thanks,
> Paul.
darthpup - 25 Apr 2006 13:14 GMT
Recommend you use a more conventional method of bleeding the system.
Two people, pump and bleed until no more bubbles.
Myles Sutherland - 25 Apr 2006 17:43 GMT
> Your skills as a mechanic sound as good as your judgement in buying a
> decent car.

Sometimes being ' honest ' can be taken a bit too far !!

Myles

>> When I bought the car I was informed that all the brake lines and brakes
>> were replaced, but the master cylinder was bad.  So I ordered a master
[quoted text clipped - 25 lines]
>> Thanks,
>> Paul.
Paul - 26 Apr 2006 03:31 GMT
> When I bought the car I was informed that all the brake lines and brakes
> were replaced, but the master cylinder was bad.  So I ordered a master
[quoted text clipped - 22 lines]
> Thanks,
> Paul.

In the interest of keeping the usenet archives up to date, after thinking
about it, and tracing the wire layouts I decided to try somethings.  First,
when I bench bled the master cylinder, I did not bleed the sensor orifices.
So I put the power bleeder back on, and cracked them open.  I left them
open till I saw fluid, and retightened.  Next I tested the voltage at the
82a point on the sensor plug (I had unplugged them to bleed the sensors)  I
read 12v.  I placed a jumper from 82a to 81 (this is the two vertical
female plugs).  Still no lights.  Testing the driver side light, I found
12v.  The lamp appeared to be good, but was not coming on.  Since I do not
have any extra lights about, I swapped with the backup light.  The light
came on.  Next I removed the passenger light box, and found the ground had
come loose.  Pressing this together gave me that light.  

I then removed the jumper, and replaced the plugs, and pumped the brakes
some.  After a few pumps the brake warning light went off, so I removed the
bleeder.  After buttoning up the hood, and putting away tools, I took it
for a little spin.  The brakes stop the car, and lock the wheels, as well
as not receiving complaints from the brake warning lights.  I am not used
to power brakes, so they still feel a bit soft, but they hold position, and
stop the car, so this must be the feeling of the pedal.  

I am waiting for a few parts from AutoAlanta to get here, and will still
replace the wire harness for the instrument panel, as it was cut by a
previous owner.  This and the heater control that is damaged will complete
the internal issues (not including the few upholstery issues, but they are
not a priority)

I tell you driving this car around really made my night, it will be probably
hard to fall asleep!  I just wish there were some nice curves close by to
test it out on.  

Thanks to all that have helped,

Paul.
Signature

Email is bogus.  Email to:
p Sorah circle at mutual data period com(ercial)
no spaces, and the usual punctuation where indicated.

 
Sign In
Join
My Latest Posts
My Monitored Threads
My Blog
My Photo Gallery
My Profile
My Homepage

Start New Thread
Enable EMail Alerts
Rate this Thread



©2009 Advenet LLC   Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.