Bleeding brakes on PSM car w/ Durametric tool
#1
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I've done several searches and can't find much of a definitive answer to this issue, so I'm starting a new thread...
Does anyone have any advice or instructions on how to properly bleed the brakes using the Durametric tool on a 996 with PSM? My '99 C4 had the master cylinder replaced and now has a soft brake pedal no matter what process we use to bleed the brakes. My independent mechanic uses a power motive bleeder and the Durametric tool, but even after updating the software, it doesn't seem to properly activate the PSM module to remove all the air from the system.
I can't help but think we're missing or forgetting something basic here, or there'd be a dozen threads with the same complaint. Anyone know what to do here?
TIA!
Does anyone have any advice or instructions on how to properly bleed the brakes using the Durametric tool on a 996 with PSM? My '99 C4 had the master cylinder replaced and now has a soft brake pedal no matter what process we use to bleed the brakes. My independent mechanic uses a power motive bleeder and the Durametric tool, but even after updating the software, it doesn't seem to properly activate the PSM module to remove all the air from the system.
I can't help but think we're missing or forgetting something basic here, or there'd be a dozen threads with the same complaint. Anyone know what to do here?
TIA!
#2
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I've done several searches and can't find much of a definitive answer to this issue, so I'm starting a new thread...
Does anyone have any advice or instructions on how to properly bleed the brakes using the Durametric tool on a 996 with PSM? My '99 C4 had the master cylinder replaced and now has a soft brake pedal no matter what process we use to bleed the brakes. My independent mechanic uses a power motive bleeder and the Durametric tool, but even after updating the software, it doesn't seem to properly activate the PSM module to remove all the air from the system.
I can't help but think we're missing or forgetting something basic here, or there'd be a dozen threads with the same complaint. Anyone know what to do here?
TIA!
Does anyone have any advice or instructions on how to properly bleed the brakes using the Durametric tool on a 996 with PSM? My '99 C4 had the master cylinder replaced and now has a soft brake pedal no matter what process we use to bleed the brakes. My independent mechanic uses a power motive bleeder and the Durametric tool, but even after updating the software, it doesn't seem to properly activate the PSM module to remove all the air from the system.
I can't help but think we're missing or forgetting something basic here, or there'd be a dozen threads with the same complaint. Anyone know what to do here?
TIA!
#3
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I don't know. I've tried to do mine for the sake of completeness as well, even though I don't have a soft pedal. Durametric seems to do nothing. I hear a relay click somewhere when I activate it, but no actual action from the ABS pump or anything. So as far as I can tell that part of the software is worthless. I've read other threads where people have had the same result, contacted Durametric, and gotten nowhere.
...and I know the Durametric people are useless and just point the finger at someone else.
#4
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The only actionable advice some people have had seems to be that if you activate the ABS during driving, you'll free up some air that's in there, which can then be purged by pedal or pressure bleeding again. An easy way to do this is to brake hard on painted crosswalks or other painted lines when it's raining. Super-slippery and guaranteed to trigger ABS action.
#5
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The only actionable advice some people have had seems to be that if you activate the ABS during driving, you'll free up some air that's in there, which can then be purged by pedal or pressure bleeding again. An easy way to do this is to brake hard on painted crosswalks or other painted lines when it's raining. Super-slippery and guaranteed to trigger ABS action.
Maybe it made a 5% difference after re-bleeding? But that's probably just my wishful thinking.
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#8
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$20 worth of speed bleeders makes the 996 just as easy as any other car with $20 worth of speed bleeders.
To those of you who are curious: thus far I have not been contacted by any of the mainstream protestant German churches about this blasphemous practice...which is nice. Further, my hands have not burst into flames, and no more portals to hell than anticipated have appeared.
I even own one of those pump-em-up bleeder things - but honestly...speed bleeders.
To those of you who are curious: thus far I have not been contacted by any of the mainstream protestant German churches about this blasphemous practice...which is nice. Further, my hands have not burst into flames, and no more portals to hell than anticipated have appeared.
I even own one of those pump-em-up bleeder things - but honestly...speed bleeders.
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#11
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Hey Jake - I'll state the obvious - there are two bleeders per caliper, correct? You're not forgetting the inboard one?
Other than that, I have no input. Please update if you resolve the problem. I need to bleed my brakes soon too. Also looking for more aggressive pads. I think my 944s stop better...
Other than that, I have no input. Please update if you resolve the problem. I need to bleed my brakes soon too. Also looking for more aggressive pads. I think my 944s stop better...
#12
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I should clarify that my question isn't really about doing a normal brake bleed--that's basically the same as on any other car. The problem is that on PSM cars, the normal bleeding procedure is not able to remove air introduced into the ABS module after replacing the master cylinder. The 'official' Porsche PST2 system handles this by allowing you to activate the module during the bleeding process, but there doesn't appear to be a way to do it manually. The Durametric tool claims to be able to do it, but it sounds like everyone is having the same experience using it as I am--the function appears to be there, but it doesn't actually do anything.
Does this make any sense? I know how to get the air out of the brake lines, but I don't know how to get the air out of the PSM module. Other people have posted about the same problem, but I've never seen a solution.
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The Durametric tool does NOT have the ability to run the ABS pump or PSM pump on the 996. I went round and round with Durametric on this and other members here have done the same. They won't admit it but it cannot.
Apparently it used to be able to but a few years ago after one of their software updates it lost this ability and they have not fixed the problem (and from what I can tell have no interest in fixing it).
Currently when you try to activate it you just hear a "click" and nothing happens.
Apparently it used to be able to but a few years ago after one of their software updates it lost this ability and they have not fixed the problem (and from what I can tell have no interest in fixing it).
Currently when you try to activate it you just hear a "click" and nothing happens.
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Nope, we're going in the right order and doing both bleeders. The pedal stays pretty spongy no matter how many times we do it.
I should clarify that my question isn't really about doing a normal brake bleed--that's basically the same as on any other car. The problem is that on PSM cars, the normal bleeding procedure is not able to remove air introduced into the ABS module after replacing the master cylinder. The 'official' Porsche PST2 system handles this by allowing you to activate the module during the bleeding process, but there doesn't appear to be a way to do it manually. The Durametric tool claims to be able to do it, but it sounds like everyone is having the same experience using it as I am--the function appears to be there, but it doesn't actually do anything.
Does this make any sense? I know how to get the air out of the brake lines, but I don't know how to get the air out of the PSM module. Other people have posted about the same problem, but I've never seen a solution.
I should clarify that my question isn't really about doing a normal brake bleed--that's basically the same as on any other car. The problem is that on PSM cars, the normal bleeding procedure is not able to remove air introduced into the ABS module after replacing the master cylinder. The 'official' Porsche PST2 system handles this by allowing you to activate the module during the bleeding process, but there doesn't appear to be a way to do it manually. The Durametric tool claims to be able to do it, but it sounds like everyone is having the same experience using it as I am--the function appears to be there, but it doesn't actually do anything.
Does this make any sense? I know how to get the air out of the brake lines, but I don't know how to get the air out of the PSM module. Other people have posted about the same problem, but I've never seen a solution.
Have you tried doing the bleeding with the engine running? Not sure it would make a difference, but I think I had to do this on some of my DSMs. Or at least it seemed to help...
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