as soon as the temperature hits 80+ outside my brake pedal starts to sink. I'm not loosing any fluid anywhere though. If I'm coming to a stoplight or something when I'm pressing the brakes the pedal slowly goes to the floor sometimes I have to lift my foot off the pedal and press it again to get pressure. Even if I'm sitting at a stoplight holding my foot on the brake, the pedal still slowly sinks.

As stated before this only happens when it's hot outside. And I know someone is going to say it so here it is again >I'M NOT LEAKING FLUID ANYWHERE, AND THIS DOES INCLUDE INTO THE BOOSTER, MY FLUID LEVEL IS FINE<

 

Your master cylinder has an internal leak. Replace the master cylinder.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Targa250R &raquo;</TD></TR><TR><TD CLASS="quote">Your master cylinder has an internal leak. Replace the master cylinder.</TD></TR></TABLE>
That's what I assumed I just don't understand why it only happens when it's hot out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ILcrxsi1 &raquo;</TD></TR><TR><TD CLASS="quote">That's what I assumed I just don't understand why it only happens when it's hot out.</TD></TR></TABLE>
If you leave it go long enough, it will start happening all the time.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Targa250R &raquo;</TD></TR><TR><TD CLASS="quote">
If you leave it go long enough, it will start happening all the time. </TD></TR></TABLE>
yeah I know I guess it's time for MC#3