Originally Posted by
matts1
what are the breather pipes like? sure these being blocked and full of gunk can cause this?
had that problem as well, but even after cleaning them mine still popped the
cap off when the boost came on, turned out to be worn rings.
but my quick fix till i had time was to put a self tap screw threw the cap into
the rocker cover to keep it on
ruff but worked a treat.