Vapor lock can also be caused by fuel lines running near hot things. I had this problem with my wife's ute, the electric fuel pump was mounted in front of the right shock tower when I bought it... after I installed A/C it would get vapor lock whenever it was on because it was all too close to the condensor. Moved it and no problems since.

Might switching to a lower octane fuel
help with vapour lock ?

The "premium" petrols here in Malaysia
are 97 octane, the "regular", 92 octane.

Hi again,

This post mentioned wrapping the fuel lines
in aluminium foil with the shiny side to help
reduce vapor lock.

http://shop.store.yahoo.com/coolfj40/vaporlockqa.html



Would this mean that the shiny side should
be facing inwards or outwards ?

I've just wrapped them and am afraid I might have
it facing the wrong way. What might happen if
I did ?

Thanks again.

tham i'd say put the shiny side out so that it reflects all the heat.

the dull(er) side would absorb more heat that the shiny side

Thanks, Ronald.

I'll take out the foil and install a new one
again with the shiny side out. I had done it
at first with the shiny side in.

The mechanic who helped me to wrap it earlier, had
wrapped additional black electrical insulation tape
over the foil, covering the entire rubber fuel line
to keep it in place. I'm wondering if this should
taken out, since the tape might well keep the heat
in rather than out.