When I first got my car, I hit .7 bars easily. Now I only can hit .6. I do feel like i'm getting less boost and the car feels slower.

My diverter valves DID go bad about 2 months ago. I replaced with new stock ones. However the NEW ones have a metal diaphragm and the old ones were only plastic. I'm assuming this is simply a better design. Other than this, i'm sure my car is running tip-top. I have around 25k miles.

We're gonna check and make sure the hoses are still fully connected.

Anyway, do you guys think there's a problem, and if so what could it be?

 

Could be the weather outside right now doing it or you could have a boost leak somewhere. Check your hoses.

 

Acutally since the weather is getting colder the boost should increase a little bit not decrease.


Do you have a flash of any kind? Also what octane gas do you have?

On some P-cars that we have had in here with our terrible 91 octane if a car gets a bad tank the boost will decrease due to Porsche's over active dynamic boost and ignition controls. Not saying that IS the cause but could be.

Mitch Mckee

 

No flash or any mods. It's 91 or 93. Whatever the highest is in St Louis.

 

If you lost 1 bar of boost you would be at vacuum.

 

Thanks, that was great help!!

 

I know, I'm an ***. I can't help myself sometimes.

It sounds like you probably have either weather related changes, bad gas, or a boost leak somewhere. Hopefully it won't be too hard to figure out.

 

HAHA! All good brotha!

 

ya...should be about .1 higher...I was showing .8 all day at the track last week...