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'91 daihatsu hijet 4x4 van 4 speed manual

My '91 daihatsu hijet 4x4 van (4 speed manual) makes a high pitched humming sound when pushing on the gas in fourth gear. It sounds like it's coming from the rear of the vehicle. It never makes the sound any other time.

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  • Daihatsu Master
  • 14,036 Answers

Could be worn universal joint bearing if noise coming from rear end of vechicle.

Posted on Aug 01, 2013

Testimonial: "That's what I'm thinking. Just exploring the possibilities at this point. Thank you."

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: high pitch sound

Front wheel bearings. We have a 2004 Limited and ended up getting both replaced (at different times) paid for by Ford. We only had 40,000 km on the vehicle at the time and had to fight Ford to cover the cost. The did come through in the end.

Posted on Sep 08, 2008

  • 98 Answers

SOURCE: daihatsu hijet 4wd van 1985 model 3 cyl 4 stroke 993cc valv tmg

If the belt has slipped you might be in trouble, becuase it's an interference engine.

e9f5605.jpg

Posted on Feb 03, 2009

sledge1863
  • 149 Answers

SOURCE: high pitch whining sound from engine

Check the power steering fluid if its low it could cause this. Also could be alternator, water pump, ac compressor, or idler pulley. My bet would be on the idler pulley, its the one that keeps the belt tension constant. Remove the belt and check this pulley for slack also spin it by hand.
Good luck, dont forget to rate.

Posted on Jan 05, 2010

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I have Daihatsu Hijet 2000, It's strat normally & after 5 minutes idle up automatically. After around 30 minutes running idle comes up very slow and stop the engine.


Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
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Why does my 2000 Nissan Quest emits humming sound when engine run


Most likely, that is the sound of the FUEL PUMP. If the car is running well, don't worry about it. Try changing your fuel filter to see if that helps (usually does).
If you have trouble with fuel delivery at high speeds or under load, suspect that your fuel pump is about to fail.

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I recently purchase a 1986 Chevy S10 4x4 pickup with 91,000 miles. It runs great, shifts great (automatic), and everything works fine. However, there is a soft humming sound that increases in pitch with...


You may be listening to a slightly noisy differential or the Tyre's....If they are off roader's they sometimes buzz....To check the diff keep it in gear and give normal gas when descending a hill and then, with the vehicle in gear lift your foot from the gas pedal....If the noise increases to any notable degree, its the diff....You can carry out the same test by disconnecting each of the shafts in turn and repeat the test....When testing the front diff, don't forget to engage the 4X4 drive or you wont go anywhere....You've said the sound is not high in volume, I'd think you can leave it...As an after thought have you checked the oil in the transfer case? Its not the same as the gear box and has a separate filler?.

Oct 16, 2010 | Chevrolet S 10 Cars & Trucks

1 Answer

2004 ford freestar 4.2L engine...high pitched


this sounds odd but mine did this when i replaced the wipers. it seems the design of the wiper frame was making a whistle at higher speeds. the freestar wipers are exposed on the window cowl and not hidden so they endure the winds at high speed. it is worth a shot.

Apr 27, 2010 | 2004 Ford Freestar

1 Answer

Daihatsu hijet 4wd van 1985 model 3 cyl 4 stroke 993cc valv tmg


If the belt has slipped you might be in trouble, becuase it's an interference engine.

e9f5605.jpg

Jan 30, 2009 | 1992 Daihatsu Charade

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