Fuel system diagnostic help.

[Joshua Van Tol]

>  > I think the hot plug wire is a red herring. The symptoms you describe
>>  sound like a fuel starvation problem. Next time this happens, go open
>>  the fuel tank, and see if you get a huge whoosh of air going into the
>>  tank.
>
>You should have partial vacuum in the tank - it's designed that way.
>
>The emission regulations (pretty well world wide) require control of
>hydrocarbon venting - that's also why the breathers are fed back into
>the intake.
>
>--
>  Phil Payne
>  http://www.isham-research.freeserve.co.uk/quattro
>  Phone +44 7785 302803   Fax: +44 7785 309674

I did actually clarify this comment when someone pointed this exact 
fact out to me. I did say a HUGE whoosh of air, implying a deep 
vacuum, but it wasn't very clear. A deep vacuum can indeed collapse 
the tank, and can with some pump arrangements, prevent pumping of 
fuel.
-- 
Joshua Van Tol -- josh at spiny.com