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this is what i've found out today 700 1990

posted by  invar on  Sat Jul 31 15:01 CST 2004
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last visit: Fri Feb 26 21:00 CST 2010
[RELATED]

I disconnected the fuel line from the fuel rail and then plugged it (the line) with my thumb so that there was a very definite very tight seal around it. I know my thumb wasn't leaking. Then I had a friend turn the key to prime the system. Again, the pressure went up to about 40-50PSI when it primed, but dropped back down to 0 within 2 seconds.

That being said, tomorrow I need to make sure that the gauge isn't somehow leaking.

I mean... it's starting to look more and more like the fuel pump, or the check valve that's integrated into it, because if it were actually a leak like this would cause fuel to actually come out from SOMEWHERE in the system, and I'd smell or see it.

Any opinions?

Thanks for all the help so far!!
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'






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