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quiet humming/moaning/hollow sound @ idle 700 1990

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posted by  thelostartof on  Sun Jan 11 18:08 CST 2004
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last visit: Wed Sep 1 17:12 CST 2010
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so i just picked up a 90' 740T w/ 150k on it .. car pretty much has all factory parts on it ... i just replace the melted AMM->Turbo pipe and am going to be doing all the vac lines tomorrow and then a tune up and oil change this week.

tho my prob is that @ idle i get this off an on humming kind of droning sound ... its very very low pitched kind of droning sound .. i can't pick it out .. but i have only heard it from inside the car not from outside yet ... it might be the clutch fan being that my 91 740T has had an elec fan for the last 2 years so.

i think itmight be the harmonic balacer going out tho when mine was seperated it made a horrible loud sound ... this sound is so low pitched i almost don't hear it.

but yea i'm gonna change most of the fluids and plugs and cap and rotor and see how she runs but so far i'm still loving these bricks






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New quiet humming/moaning/hollow sound @ idle [700][1990]
posted by  thelostartof  on Sun Jan 11 18:08 CST 2004 >


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