PSE Button
#17
Burning Brakes
Join Date: Nov 2001
Location: San Francisco Bay Area
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I think your solenoid is faulty and/or one/both of the vacuum actuators are bad.
At least according this post link, the system fails to sport mode (valves open).
Another relevant post here
It seems the design is such that when a vacuum is pulled on the actuators, the exhaust is quiet. Seem's counter-intuitive to me but I didn't design it
You can try to disconnect the hoses to the valves near the solenoid and pull a vacuum to test. Easier than going below the car.
At least according this post link, the system fails to sport mode (valves open).
Another relevant post here
It seems the design is such that when a vacuum is pulled on the actuators, the exhaust is quiet. Seem's counter-intuitive to me but I didn't design it
You can try to disconnect the hoses to the valves near the solenoid and pull a vacuum to test. Easier than going below the car.
#18
Rennlist Member
I had the same thing happen to the PSE on my 2010 C4S Cab..... turned out there was a pinch in the vacuum line. Everything was connected, the solenoid was fine, but the valves were defaulting to open since there was no vacuum pressure to close them (leaving me with the LOUD exhaust note full time) even though I hadn't activated it via the button (so the light was not on). I actually prefer it on 100% of the time, but when I pull out of the driveway at 5.45am for work my neighbors don't appreciate the throaty sound as much as I do.....
#19
Instructor
Thread Starter
I had the same thing happen to the PSE on my 2010 C4S Cab..... turned out there was a pinch in the vacuum line. Everything was connected, the solenoid was fine, but the valves were defaulting to open since there was no vacuum pressure to close them (leaving me with the LOUD exhaust note full time) even though I hadn't activated it via the button (so the light was not on). I actually prefer it on 100% of the time, but when I pull out of the driveway at 5.45am for work my neighbors don't appreciate the throaty sound as much as I do.....
#20
Instructor
Thread Starter
Well, with time...things reveal themselves. Out for a drive and check engine light came on. Everything appeared okay on the service. Gauges all reading normal, engine idling and running fine. Sport Exhaust: no longer throaty. Hmmmm....
Going to throw a scanner on and see what we find.
Stay tuned...
Going to throw a scanner on and see what we find.
Stay tuned...
#22
Instructor
Thread Starter
I did some searching. Can anyone confirm if P1486 is DME Control Unit Fault? If so, any thoughts as to whether that means replacement or is there some other test that can be done?
Thanks!
Thanks!
#24
Instructor
Thread Starter
Here's some info:
https://rennlist.com/forums/997-foru...is-5-08-a.html
I Googled "Porsche DTC P1486"
https://rennlist.com/forums/997-foru...is-5-08-a.html
I Googled "Porsche DTC P1486"
#25
#26
Rennlist Member
Lessons learned - don't trust old guys' memory and OP lack of PSE button appears normal. Hope you've gotten the CEL sorted.
#28
Burning Brakes
#29
Rennlist Member