ok wow so the tappet cover outlet was plumbed to airbox and throttle body bunged off? Mine is LPG also but this has not been done. If you have a pic of
that please post it.
That still creates enough vacuum to suck the crankcase fumes out?
How does replumbing it solve the issue of the stalling if you remove the dipstick?
This was an issue unique to the XEs and XF EFIs only from memory, is that right?