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Loud vibrating/knocking noise

Had trouble starting, especially in cold weather, occasionally would show all lights on dash but absolutely nothing when turned key. Found loose earth connection. always had tappit sound from cold. Got through mot, but develloped loud vibrating noise which came & went when driving,sometimes giving a little exceleration when it disappeared. Eventionally staying there permanately. when staring from cold it would cut out with a bang,like something had hit you from behind.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 16 Answers

SOURCE: loud noise and vibration in the hole car when driving especially

By the sound of what your saying i think the easiest and cheapest thing is to check the driveshaft. Besure to check the uni's. You may not see any problem with it if this is the case remove it and check the yoke of the gearbox & diff if these are ok take the driveshaft in in the shop to be rebalanced.

Posted on Feb 16, 2009

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SOURCE: winding noise or vaccum leak from front of motor.

A/C -Heater controls
Has you are aware the A/C Clutch compressor is engaged at all times when the defrost mode is turned on. Turn off all heater controls. If the noise is gone it will be either the Air conditioner compressor clutch bearing or possible the idler pulley bearing .
The Warden

Posted on Apr 26, 2009

ftw1952
  • 10319 Answers

SOURCE: car won't start!!! & ABS Light on

Sounds like carbon build up on the contacts inside the electrical ignition switch which is not the key cylinder. Its located on the lower steering coluum if coluum shift or if you have a floor shift it will be inside the console

Posted on May 29, 2009

co7196
  • 3433 Answers

SOURCE: 2004 Nissan Quest - Engine chatter/knocking

Ther e is a chance your injectors are leakin g down and there is excess fuel in the cylinders. Not a good thing. So, you fuel pressure and injectors need chkg. good luck

Posted on Jun 09, 2009

  • 14036 Answers

SOURCE: Toyota Corolla 1995 starting problem with loud noise

CHECK THE STARTER.MAKE SURE ITS NOT LOOSE.IF ALL IS GOOD.THEN THE STARTER COULD BE BAD.IT COULD HAVE WORN DRIVE GEARS OR THE FLYWHEEL COULD HAVE WORN OR BROKEN TEETH.IF YOU REMOVE STARTER TO CHECK IT AND FLY WHEEL MAKE SURE TURN OFF RADIO SO YOU WONT LOSE PLAYING CODE.WHEN YOU REMOVE NEGATIVE BATTERY CABLE.

Posted on Oct 28, 2009

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WHAT IS THE LIKELY CAUSED OF A LOUD SQUEALING NOISE COMING FROM THE ALTERNATOR SERPENTINE DRIVE BELT SYSTEM ? IS IT THE ALTERNATOR OR SERPENTINE BELT?


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NOISE


This can be a sound made by "cam phaser" engines that Ford made for 4 or 5 years. Usually the noise quits above 2000 rpm as the phasers limit out in their travel. These engines are very sensitive to the correct weight oil being used and a Ford filter being installed.

The noise has been described as a muffled diesel rattle. Owners report stalling, hesitation, poor acceleration, but most do experience vibrations. What is happening is each bank of cylinders is suppose to be synchronized by the phasers. Imagine if half of the valves are firing several degrees earlier or later than the other half of the engine. Since these adjustments constantly change it makes trouble shooting difficult.

Other areas for rattles are the beads in the catalytic converters which may loosen and float inside the converter or even loose baffles in honeycomb design converters.

I have had terrible noises coming from gravel and rocks trapped in between the heat shields of catalytic converters especially if you travel gravel roads. Since you have "knock sensors" you can get driveability problems from the engine trying to misinterpete the knocks and rattles caused by rocks.

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The sensor picks up noise and vibration in the engine such as a spark knock would generate, and the computer slows down the spark timing to fix it. If the noise or vibration continues, the code is set.
Could be a noisy valve, or a problem with the crankshaft or other component.

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have you check the level of the oil... if it is down you are either dumping it on the ground (major oil leak) or it's burning oil quickly... i suspect if you ran it without oil the damage is done... either buy some stp oil conditioner (thickens the oil) or start using 50 weight oil.... all that will do is keep it quiet mostly.

one thing tho... don't try these solutions if you live in a cold weather climate... the oil will get so thick because of the cold you will have trouble turning it over.

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