j cAT,
Okay I will give the propane a try.
This is one strange engine design. I found that the EGR is bolted directly to the lower block on the *intake* side of the engine. How does it get exhaust gas from that location? There must be some odd internal plumbing to do that.
Also, there is a 1"OD hose coming off the valve cover with a T connection for the normal PCV hose. The other section of the 1" hose goes to the intake manifold behind the throttle butterfly. Could this hose be providing all the extra air?
Everything is a bit tight to work on... I don't have small Korean hands either.