Question about 1996 Volvo 850

3 Answers

There is an electronic components located in the air line between the air intake and the engine. It does not seem to be functioning it just hums when the ignition is turned on and the vehicle will not start. I have search for this part but am not sure exactly what it is called. Any Help?

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  • Contributor
  • 70 Answers

That sounds like your idle air valve. On 1994 to 1997 850 models, it does hum as it is pulsed on. If it is broken and stuck shut, it may still hum.
FCP Euro Genuine Replacement

Posted on Oct 22, 2013

  • _-__-___-_
    _-__-___-_ Oct 22, 2013

    fixing cars with no manuals, now that is a hard job. not saying exactly what hums, makek any answer a pure guess. The car has an ISC and will hum. key on, all non stepper motor type, ISC hum, mine hums at 200HZ, its a modulated ISC< called PWM method(ASE class learning) Ok so again why not DIAGNOSE it? start by ANSWERING my first question. DOES the engine crank at full speed, cranking, ?????

  • _-__-___-_
    _-__-___-_ Oct 22, 2013

    1 tiny step for man kind......

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  • Expert
  • 86 Answers

Its the coil

Posted on Jan 01, 2014

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  • Volvo Master
  • 20,706 Answers

Will not start, or will not CRANK? be clear here.
its a Volvo, (ghastly. and no more mommy" where is volvo today?)
what county was it sold,or where are you if same.?
cars vary by country, (to the extreme)
USA answering... and lots of guessing... no photo part, makes this
100% harder. but..
buy the FSM used, on fraudbay.
go to alldata.com and its there.'
i see it there , so can you.

if it dont crank, hot wire the starter, with good charged battery
jumper start it. does it crank now.
lets say, its good cranking no start car.
the fiirs test is for spark
check spark at all 4 spark plugs, using a new real spark plug for car.
in fact now do that 60k mile tuneup you missed, 100k meters.

Posted on Oct 15, 2013

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Posted on Jan 02, 2017

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(see Figure 14)
The 3.1L engine is equipped with upper and lower intake manifolds. The upper intake manifold is also known as the intake manifold plenum.

CAUTION The fuel system is under pressure and must be properly relieved before disconnecting the fuel lines. Failure to properly relieve the fuel system pressure can lead to personal injury and component damage.
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zjlimited_601.jpg

Fig. 14: View of the intake manifold and related components

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The intake pushrods are marked yellow (5 3 /4 inch long) and the exhaust are green (6 inches long). Make sure the pushrods are properly seated in the valve lifters and rocker arms.
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