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The Official "Things you didnt know about your 996" thread

Old 10-13-2009, 02:59 PM
  #121  
redridge
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Originally Posted by wwest
"..The ecu will adapt to your driving habits.."

And here I thought Porsche owners were too bright to believe that CRAP..!!

Maybe in the general case.

Even if the ECU does "learn", adapt, to some aspects of your driving habits those will be, MUST, be erased upon each engine stop/start cycle.
huh? So, when you put an exhaust or a cai... the ecu wont know the diff between aftermarket or stock? The engine management on these cars are adaptive... just about any modern sports cars have this feature. When you unplug the battery, the mapping goes to default... as you drive... the car learns your driving habits. In other words... it re-maps itself based on trending patterns of the way you drive.
Old 10-13-2009, 03:31 PM
  #122  
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Originally Posted by Tippy
Although not confirmed myself, I have read that the Tip cars have a direct pulley on the alternator while the manuals have a sprag type pulley.

I remember my Tip alt pulley was solid.

Can anyone confirm this?
Yep, Tippy, confirmed. Tip's pulleys are hard connected to the alt shaft, whereas the manuals have a free-wheeling clutch (sprag) type pulley, sort of like the rear cassette of a bicycle. Alt can then freewheel back down to engine speed rather than be sucked down with it.

I'm guessing this is this to decrease drag on the motor, and help keep revs up when shifting???
Old 10-13-2009, 11:56 PM
  #123  
wwest
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Originally Posted by redridge
huh? So, when you put an exhaust or a cai... the ecu wont know the diff between aftermarket or stock?

Not immediately, not unless you "tell" it.

The engine management on these cars are adaptive... just about any modern sports cars have this feature. When you unplug the battery, ("telling" it") the mapping goes to default... as you drive... the car learns your driving habits.

No, it learns new engine/sensor/control mapping parameters while you drive, based on how you drive, NOT YOUR driving habits.

In other words... it re-maps itself based on trending patterns of the way you drive.

Once a parameter is "mapped" it will not be re-learned in accordance with ANYONE's driving habits. Excluding driver unique parameters that are ERASED upon each stop/start cycle, MUST be erased.
My statement applies to the systems "learning" "...your driving habits..."

Modify the engine in some manner and the ECU will eventually learn new parameters if/as needed. Or you can disconnect the battery for a period and the ECU will adapt to the "new" parameters more quickly.
Old 10-14-2009, 02:01 AM
  #124  
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Originally Posted by Tippy
-If you have a Tip car, you will state that your car doesnt get hot and wonder why everyone elses does. Then you remember your 3rd radiator that only Tip cars have.
Did you know that not all Tiptronics come with the 3rd radiator?
Old 10-14-2009, 10:00 AM
  #125  
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how can I tell if I have the 3rd rad?
Old 10-14-2009, 12:10 PM
  #126  
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Originally Posted by PasPar2
how can I tell if I have the 3rd rad?

Walk to the front of your car. Bend down and look into the big opening in the middle. If the opening is actually open and you see a radiator grille in there, then you have the third radiator (the other two radiators can be seen with a flashlight by lookng onto far corners of the front openings). If you see black plastic, or nothing but the outside of the truck well, then you DO NOT have the third radiator. Most C2 manual shift cars DO NOT. All GT3, and Tiptronic C2/C4 (should) have them. C2S/C4S may have it, depending on year.
Old 10-14-2009, 04:50 PM
  #127  
gota911
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Another thing.... The driver's side rear fog light is operable but the passenger side rear fog light does not illuminate. It comes that way from the factory.
Old 10-14-2009, 04:53 PM
  #128  
Tippy
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Originally Posted by CosmosC4S
Did you know that not all Tiptronics come with the 3rd radiator?
Is this a rhetorical question?
Old 10-14-2009, 07:36 PM
  #129  
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no rad on mine
Old 10-14-2009, 10:36 PM
  #130  
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Originally Posted by Tippy
Although not confirmed myself, I have read that the Tip cars have a direct pulley on the alternator while the manuals have a sprag type pulley.

I remember my Tip alt pulley was solid.

Can anyone confirm this?
True if the original engine. All M96/01, M96/02 and M96/04 replacement engines from Porsche have a Tip harness installed and the sprag type pulley. Therefore, the replacement engine can be used in either a Tip or a manual car. The freewheeling pulley was to fix a belt shredding problem IIRC.
Old 10-14-2009, 11:29 PM
  #131  
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Originally Posted by gota911
Another thing.... The driver's side rear fog light is operable but the passenger side rear fog light does not illuminate. It comes that way from the factory.
+1
and if you want to get a redneck to laugh at your car because it has "electrical problems" just drive in front of your brother with that on and he will be happy to do that for you......

Then explain that it is "normal" and you did that on purpose to see what he would say and it will confuse the sh^t out of him as he will again explain that something is wrong with your lights.....
Old 10-15-2009, 08:44 AM
  #132  
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I've been playing with that climatronic diagnostic. Super cool stuff. It's fun to watch the coolant temp (6c, I believe) get up to 87 degrees, then drop down a few as the thermostat opens, then climb up into the 90s.

We'll have to figure out what some of the "unknown" codes are.
Old 10-15-2009, 08:44 AM
  #133  
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I've been playing with that climatronic diagnostic. Super cool stuff. It's fun to watch the coolant temp (6c, I believe) get up to 87 degrees, then drop down a few as the thermostat opens, then climb up into the 90s.

We'll have to figure out what some of the "unknown" codes are.
Old 10-15-2009, 09:32 AM
  #134  
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That a CEL on the 996 is usually FI/sensors related whereas other cars I've owned were always polution emissions related. This caused me not to diagnose for 55k miles thinking, "ah, its ok", when the whole time the MAF had croaked.

Bosch electronics..........Germans cant make anything electrical worth a crap and plastic for that matter!

Relax, I'm kraut.
Old 10-15-2009, 10:22 AM
  #135  
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Originally Posted by Tippy
That a CEL on the 996 is usually FI/sensors related whereas other cars I've owned were always polution emissions related. This caused me not to diagnose for 55k miles thinking, "ah, its ok", when the whole time the MAF had croaked.

Bosch electronics..........Germans cant make anything electrical worth a crap and plastic for that matter!

Relax, I'm kraut.
My Bosch dish washer is the best and quietest dish washer ever! That said, it's had to have it's front pannel and another electric component replaced thanks to German over-engineered yet crappy electric components!

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