Originally Posted by
DickieO
Thanks all for all the help,
Woke up early this morning after leaving the battery disconnected all night to have a sticky beak.
I could hear a leak (hissing sound) coming from the needle valve under the dash while idling and noticed the grub screw had come loose. When i closed the valve completely the hissing stopped, backed it off half a turn to where i could just hear the hissing again and tightened up the grub screw. Test drove and was getting 15psi of boost.
Spool rate was super quick, so adjusted it while making my way to work. Till i was getting more normal reading.
I did loosen and retightened the dawes valve as mentioned, i didn’t clean it though. This may of done it. Not completely sure just yet.
Seems to be driving fine, Boost and EGT looking normal but i will do some more investigating.
Thanks all.