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03-09-2011
Your supercharger isn't going out. If you had full boost and then all of the sudden had half boost, you knocked a vacuum line off somewhere or damaged the bypass valve by accident. I've never one of these superchargers fail and immediately output less boost. If anything, they wear over time and probably lose a nominal amount of output. A "failing" blower would be one that is making loud bearing noises and even that blower would still make full boost.Originally Posted by mngtp
03-09-2011
I know its probably a dumb question. But what is PB? I quickly cleaned the egr valve last night. The light went off after driving about 10 miles on the freeway while I was going to the store, but came back on on the way to work. Do you think I just need to clean the egr valve better?
03-09-2011
Sounds like you will need to replace the EGR. PB Blaster is a penetrating catalyst that you spray on nuts that are rusted and froze up.
03-09-2011
Ok. I had a guy at work watch the boost gauge while I reved the engine and worked with the valve. If I hold the arm (under the bbv, its the black dome thing like in the picture posted) up, nothing happens. But if I push it down so it is flat, it boosts full. I sprayed PB but it didnt make a difference. I reved the engine wthout touching it, the arm doesnt go all the way flat. I hope this makes sense. Any ideas? Ugh this is annoying. I bet its getting a little annoying for you guys too.
03-09-2011
Makes sense...looks like a bad BBV too.
03-09-2011
That about how my luck goes. Is it possible to replace the bbv? If so how hard is it? What would I need? And what would I need to do to replace the bbv? If I dont fix it, will it hurt anything else besides the performance of the car? This is my first car with a blower.
03-09-2011
Is the electrical connector on the valve plugged in? Are you verifying that there is no vacuum leak? It's highly unlikely that the bypass valve would fail without any outside interference.
If it indeed needs to be replaced it is a cheap and easy part to replace though.
03-09-2011
I looked and didnt see any loose, broken, cracked, or separated vacume lines. I even sprayed carb cleaner all over like the tech at my job told me to do to detect any leaks and I found nothing. I will look to see about the electrical connection in the morning. I assume the connector is on the black dome part of the bbv. Correct?
03-10-2011
I dont believe that the BBV has any electrical connections, it only has vacuum connections. Unless, Mike is talking about the BBV solenoid which is #7 on the vacuum diagram that I posted earlier in the thread. My car is at the muffler shop gettin some tips welded in, so I cant verify. But Im pretty positive the BBV itself has no electrical connections.
03-10-2011
I missed this post... Does that arm go flat (horizontal) with the engine off? The more I think about it the less sense this makes as a vacuum leak would result in the valve staying closed which would result in constant boost. The arm connecting that piece is adjustable. If nothing else I would just adjust the boost bypass so that that little metal piece at the end of the rod stays flat under throttle (and with the engine off) and stays vertical when the engine is idling.
03-10-2011
The arm is flat when the engine is off. But when the engine is running it is verticle. When the engine is reved the arm moves, but doesnt go all the way flat. How do I adjust the arm if that is what I need to do to fix the boost problem?
03-10-2011
That's odd. It's as if the bypass is never seeing zero vacuum, even at wide open throttle or the spring that forces the bypass to return is broken and overcome by pressurized air. Have you checked to make sure that spring is indeed properly seated?
03-10-2011
did u check the rubber T fitting that goes into the lower intake mani under snout?
Originally Posted by SuperSport
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