Arty, you probably need to do an inlet tract (filter to inlet manifold)
including Idle Air Control Valve cleanup. This is needed every two years for
the engine to have the best inlet conditions for satisfactory running. When
thoroughly cleaned reset the slow running speed and throttle switch if
necessary. The pump may be responding to possible in-tank pump irregularity.
Unless your car has Regina/Rex fuel ignition system there are two pumps
fitted, one in-tank and one main (underneath car under passenger seat)
presuming you to be in UK. If Regina/Rex then there is only one pump which
is of in-tank variety but much stronger than two pump in-tank pump.
You may also need to check the condition of the ignition set-up.
Good idea to join the Volvo Owners Club, check out details and joining
instructions on the website URL is http://www.volvoclub.org.uk
receive your goodies package you will find a form for registration of your
car to the register below.
All the best, Peter.
700/900/90 Register Keeper,
Volvo Owners Club (UK).
"bodacious" <email@example.com> wrote in message
> Evening all ! This is my baptism of fire, so to speak. I have just taken
> delivery of my first Volvo, an immaculate 740 GLE with 130,000 on the
> clock. It starts and runs really well (asnd the body-work is also
> remarkable). But the petrol pump occasionally makes a low unobtrusive
> whiring sound at idle. Also the idle is not smooth. When warm the engine
> is quite erratic, not smooth at all.
> May I ask if anyone thinks these two symptoms are related. Or, is this a
> common fault with the 740, please?
> any ideas, guys?
> Best wishes