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Hi George -
I'm 41. Younger than yourself, perhaps, but not too young to understand the mystic SUs.
On Scott's car, the vent hole on the forward float bowl is venting fuel instead of air. It's not coming from the bottom of the bowl nor the jet, nor is the fuel line cracked or ill fitting. The car has the correct heat shield.
After adjusting the float (which was waaay out of spec), the problem went away... for a very short time - maybe 15 minutes of running and two or three startups. After replacing the needle and seat with new parts, the problem went away again... until, apparently, a few days ago.
Unlike Matt, I've seen more than one Volvo that has benefitted by the use of a pressure regulator. At this point, I'm thinking that might be the way to go for this car, as its fuel pump is a newer aftermarket device that I suspect produces more pressure than the old style needle can control.
I also have some unused Grose Jets that I might try, though I don't think they're necessarily better or worse than the old style needle and seat.
But first I think I'll finish enjoying the 'flu. At least it's not H1N1. At least I don't think it is.
Any ideas on the ol' carbies you might have are welcome. Just a quick recap:
fuel lines are not leaking
jets are not leaking
bowl-to-jet lines are not leaking
new needles and seats are installed
new bowl gaskets are in place
floats properly adjusted
... about all I can think of that's left is fuel pressure. Any thoughts on what I ought to bring along when I make an (extremely rare) house call?
Best,
Cameron
444,122SC
Rose City
I once had a bird
Its name was Enza
I opened the window
And in flew Enza
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