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Discussion summary
YOUR RESEARCHNew method to put PSE in All-time Sport Mode
Leading reported evidence
Clean car engine until it is factory
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Suggestion
They even make you clean the car engine until it is factory clean.
Leading evidence: 'Clean car engine until it is factory' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean car engine until it is factory' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
I kid you not when I say the dealership actually had guys with toothbrushes cleaning the engine so that it would pass inspection.
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Suggestion · Original poster
When I picked up my new C4S with factory PSE, the dealer tech told me if I wanted to have the PSE in full time sport mode to just disconnect the black vacuum line from the switch/valve in the engine compartment rather than mess with the electornics.
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Suggestion
Disconnect the electrical connector on the PSE vacuum switch in the engine compartment.
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Suggestion
Essentially disconnecting the pink speed signal wire on the back of the PSE relay connector (what the relay plugs into) or cutting the relay diode does the same thing as all the diode does is prevents current from going into the speed signal line.
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Suggestion · Original poster
When I picked up my new C4S with factory PSE, the dealer tech told me if I wanted to have the PSE in full time sport mode to just disconnect the black vacuum line from the switch/valve in the engine compartment rather than mess with the electornics.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
Essentially disconnecting the pink speed signal wire on the back of the PSE relay connector (what the relay plugs into) or cutting the relay diode does the same thing as all the diode does is prevents current from going into the speed signal line.
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When I picked up my new C4S with factory PSE, the dealer tech told me if I wanted to have the PSE in full time sport mode to just disconnect the black vacuum line from the switch/valve in the engine compartment rather than mess with the electornics. Most of the suggestions I've seen talked about cutting the diode or pulling the speed sensor wire.
Disconnecting the vacuum line seems to work fine. Wonder why no one has done this. Took all of 1 minute.
Keith
One problem. If you do that you lose the ability to turn it ON and OFF at will.
I modified mine to remove the speed cutout but retain the ON/OFF functionality.
The main reason many others did the electronic mod is because they wanted to be able to turn PSE on and off at will. Doing the electronic mod disables the automatoc "cut off" of PSE (even when it is on) that occurrs at approximately 30 to 45 MPH. THis cut off was added to comply with noise abatement laws in some countries (primarily Sweden).
I am on a German message board for Boxsters, where there are German and Swiss owners.
The Germans blame the Swiss for the drive-by noise law. Then the Swiss point their fingers at the Germans.
It's definitiely swiss, I lived there for a few years and they are kind of crazy about this stuff.
I once moved from Germany into Switzerland and brought a Merc ML over the border with me (I moved a couple of hundred miles). The paperwork I had to go through to import the car was unbelievable. They even make you clean the car engine until it is factory clean. I kid you not when I say the dealership actually had guys with toothbrushes cleaning the engine so that it would pass inspection.
Like I said, they are a bit crazy..........
I've had my '03 C2 for about two months with factory PSE. I'd been reading about this topic and didn't notice any change in sound through the range in question. Yesterday I popped open the relay and discovered the previous owner had already snipped the diode. He must have been a renlister!
Unfortunately, you will induce a vacuum leak in the engine when it goes through the 35-45 mph range when you disconnect any of the PSE vacuum hoses, and not address the root cause, which is the speed signal allowing the PSE relay to go into quiet mode.
There are 2 "proper" ways to modify the PSE to get rid of the 35-45 mph quiet mode, that will not have any detrimental effects.
1. Disconnect the electrical connector on the PSE vacuum switch in the engine compartment. The downside of this is that manual control of the mufflers for is disabled.
2. Disconnect the Pink speed signal wire from the PSE relay plug on the relay support bracket under the drivers side of the dashboard. Without a speed signal, the relay does not operate the quiet mode at 35-45 mph. This method retains full control of the quiet mode via the dash switch, and does not damage any components.
Modifying the PSE relay by cutting components is not recommended.
I'll give a try to the electricl disconnect. I haven't noticed any effects of a vacuum leak although I did plug the connector where the vacuum line attaches in the engine compartment.
Keith
I am re-hashing an old thread but my friend has a 2007 C2 with the PSE. He asked me to look into disabling the dashboard switch so it is loud all of the time as he is mechanically uninclined. Can you please elaborate on number 2 above? Do you have any pics on the Pink signal wire under the dash to disconnect? If not, can you point me where under the drivers side I should look.
Thanks,
Adam
If your friend just wants to disable the PSE quiet mode entirely and in the process completely disable the dash switch, the simplest way to do that is to unplug the vacuum solenoid valve in the engine compartment. it is next to the power steering fluid tank and above the battery tap. It looks like this:
Just pull the brown connector, tape over the end of it on both sides to protect from gunk, and you are done. The PSE will now be loud all of the time.
I like method number 2.... but instead of removing the pink wire, I installed a small toggle switch in between, now I have both auto/manual option with a flick of the switch.
I heard creating a vacum leak creates raised pressure on the RMS
Why would anyone ever want to turn the PSE off??? The guy who owned the car before me did the relay hack.
one great reason to turn it off is for early morning Sunday drives.... why wake up the whole household/neighborhood.... you can sneak out under the radar.
yes, the orange connector.
I just want to defeat the 35-45mph cutout. I want my dash switch that defeats the PSE to still work.
Does cutting the diode just defeat the mph cutout? I don't want to disable the PSE switch on the dash.
Also, where is the pink wire found (in case I want to go that way - it seems easier). Thanks!
The easiest way to do this is to just unplug the relay all together. This disables the switch on the dash, but who cares, since the sport exhaust sounds perfect. Then if you ever want to put it back, just plug in the relay again.
Essentially disconnecting the pink speed signal wire on the back of the PSE relay connector (what the relay plugs into) or cutting the relay diode does the same thing as all the diode does is prevents current from going into the speed signal line.
To get at the pink speed signal wire, you have to get at the back of the replay support bracket, which is held in by one bold and a hinge clip. It is not that hard to do, just very awkward get up into the drivers footwell.
Pulling the relay out and working on it at a bench is much easier, and I would suggest rather than cutting the diode, that you desolder it from the relay on one side, that way you can always put it back.
This will keep the dash switch operative and disable the speed dependent "quiet mode" .
Yes, if you unplug the vacuum line, you'll need to plug the hose with something.
If you don't care about turning on and off the PSE, then just pull the relay completely out. It takes all of 5 seconds.
- Anthony
One reason is you would want to cycle that valve once in awhile.... if you dont, it will eventually seize up. That valve is the main reason why the PSE is very expensive.... there have been alot of PSE with internal rattles.... the valve or not have the exhaust gas flow into the other chamber may be the source of the rattles.... you dont use it, you loose it.
I think I have noticed mine rattle once in a while, around maybe 1500 RPM when I am just starting out. The valve had been active for 5 years, so I don't think it has seized up. May just be a normal occurance...
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