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supercharger

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rtorres422

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i have a 99 gtp and i replaced my coupler because my supercharger stopped whining, but still with the new coupler the supercharger doesn't whine. does anyone know why this might be happening?
 


when you had it apart did you try turning everything? to check for slack, and or bad bearings? or have you changed anything else, intake/exhaust?
 
Hey Torres. Yea, Boost “By-Pass” valve is good to check first (expensive $211.00/dealer), but what about the vacuum lines that control the Boost “Solenoid” valve (which controls the Boost “By-Pass” valve). It's the little one (Boost “Solenoid” valve) next to the large one (Boost “By-Pass” valve) with the vacuum line (directly) connected to it. That vacuum line can cause all kinds of trouble, too. Good luck Torres.
 
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'stopped whining' isnt a good enough description. are you making boost? how much boost? do you have a vacuum leak? did you forget a belt?

need more.
 




run the car, get somebody else to hit the gas a few times while you watch the belts, look for any pullies not tunning smooth, how is the tensioner arm and pullie?
 


rtorres422 said:
how do i check if the boost bypass valve is working???
Click to expand...

I agree with bluegtp91. I would say look for the presence of something that would MAKE IT fail. That would be the "rubber T fitting".

* Open the hood, looking into the engine compartment.

The vacuum line that starts under the SC nose cone, around the front of the SC, right there is a Rubber T Fitting.

The “Rubber T Fitting” goes on to directly connect to the "boost (vacuum) solenoid" (next to the larger boost bypass valve). That is why it is important, it can cause everything to go static, until vacuum control is restored. Look at the "Rubber T Fitting".
 
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