Re: ANOTHER #%*!:( BTV failure

Posted by HH56 On 2010/10/11 8:57:36

I'm agreeing with PV8 on this one. There is no adjustment on the BTV or any other vacuum type unit I'm aware of.

As the vacuum is more than adequate, aside from something put together wrong, the only thing on the booster side I can think of that could maybe mess with boost is a partially blocked air inlet under the cleaner mesh. If they painted the can and taped the inlet holes & didn't remove all the tape that could cause problems. The only other thing I can think of on BTV side would be the residual check valve. On the original I don't think they could be installed backward but the replacements are a flat rubber disc in a retainer. I am not sure if they can be installed wrong or exactly what the symptom would be if they can--but I think you would be trying to apply brakes against the normal valve flow which would need more pressure.

If the sleeves were installed partially blocking the passage or if the diameter of the cylinders were made smaller with the sleeve, both could affect the amount of pressure needed.