Welcome to RennTech.org Community, Guest
To all 996 owners with PSE, especially those with a 4S.
I think my 996 C4S exhaust behaves oddly. I think it's a fault but you might tell me it's normal behaviour. The problem is that I've always had this 'fault' on my car so I don't know if it's a fault or intentional behaviour. If you have the same car, perhaps you can shed some light on this.
When I start it, it's noisy and sounds great. It quiets down as it runs for the first 5 mins.
I have the PSE system and when I press the button you can audibly hear the exhaust note change - quieter when on and louder when off. Default is off so loud.
Here's the rub. Up to around 1500rpm it's got a good noise then it fades out to the point where it's so quiet it's like driving my partners Yaris. If I keep accelerating, when I get to around 3500rpm the exhaust suddenly gets loud again. I mean it's immediate - like someones flipping a switched marked loud. It sounds great.
It happens in 2nd and 3rd gears most noticeably and the PSE is in the 'off' position. If I have the PSE button on, then it's just quiet all the time and that works fine.
So why the silent spot?
I did read somewhere that German market cars might have had a system that turns on and off the PSE at certain speeds to prevent people driving round residential streets with a loud exhaust but information is thin and I don't think I was ever on UK cars.
I have also had a small go at checking vacuum pressure at idle on both sides of the Y piece in the engine bay but both hold good pressure. One side has only a microscopic leak but not enough to cause this kind of issue.
i have a problem, my 997 Turbo has a fault in the airbag system. I changed the front right airbag sensor, must have done something stupid with my Piwis 2 Tester, because now the airbag warning light on the dash is blinking. Does anyone know what’s wrong?
Doing the 80K mile service and have run into a problem.
The oil is changed, all filters refreshed, motor mounts replaced, brake fluid flushed, but plugs need to be replaced. Never pulled mufflers with PSE, and am at a loss on how to remove the stainless braided vacuum hoses that are crimped onto the valves. The heat shield (driver's side) is off, but without removing the muffler can only get to two of the three plugs.
Hoping for help and thanks in advance.
FWIW ... 2012 GTS. The subject of another post on center locks.