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Knocking noise - 2005 Lincoln Navigator

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Not good to have a knocking noise.
An engine knock can be serious signs of engine failure coming soon....whatever it is have it looked at right away before you have a complete break down on your hands.

Posted on Jul 04, 2010

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2 Answers

Does a knock sensor sound like a rod knocking


Knock Sensor contains no moving parts and can not make any noise. It only detects noise in the engine block to allow the engine control computer to make adjustments as needed.

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97 grand marquis engine makes a knocking noise


have the timing checked if its off it could be pre-ignition which some people describe as a knock. if its a heavy knocking noise it could be a piston noise or it may even be a bad crankshaft/connecting rod/bearing. have the oil pressure checked this may help to know what to do. some people describe a rocker noise as a knock but its more like a ticking noise at the top end in the area of the valve covers.

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I have a 2004 ford 150 with a 5.4 and its making


knocking noise as in rod knock? or knocking noise from a fan blade hitting the fan shroud?

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Knocking noise


Mechanical wear on engine, incorrect valve timing, lack of oil.
Knock sensors are detecting engine knocking so sensors not at fault. Ignore fault codes and deal with the noise.

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Sounds like a rod bearing knock.

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Knocking noise in engine of 2002 Nissan maxima


This is hard to say with hearing the noise but try to pin point the noise , is it coming from the top or bottom of the motor , the knocking noise could be a bearing in the lower motor or may be something else making it sound like a bearing,

Oct 05, 2012 | 2002 Nissan Maxima

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KNOCKING NOISE IN ENGINE UNTIL CAR WARMS UP


I have the same car, but my engine makes the knocking noise after I turn it off for about two seconds. Has this happened to anyone else? Dealership says it's normal. All this cars make this noise.

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Knocking noise when reversing


check your lug nuts. also check the axle shaft joints.

Jan 02, 2012 | Nissan N Z 38 POWER CAT Cars & Trucks

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The engine has a nkockig sound..could this be caused by a bad knock sensor?


No it isnt a knock sensor the knock sensor job is to detect a knock noise and ****** timing. The knock that it is looking for is from octane or fuel or pinging that creates N0X s. A pollution gas. The knocking noise that you are hearing is different. If it is a multiple noise ar a rattling sound that will be the valves. There are other noises like a piston knock this knock is a sharp metallic noise, If the knock occurs only on acceleration that noise is a crankshaft noise. You need to check you oil level and make sure it is corrects. Look at the oil condition do you see silverish or whitish condition,is the oil deep black.

Apr 24, 2011 | 2004 Nissan Maxima

1 Answer

WHERE IS THE KNOCK SENSOR ON A 2006 CHEVY COBALT TO REPLACE IT.


Not related to the O2 sensor. Located on the front of the engine just above the starter KNOCK SENSOR (KS) SYSTEM DESCRIPTION

PURPOSE
The knock sensor (KS) system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The ECM uses the KS system to test for abnormal engine noise that may indicate detonation, also known as spark knock.

SENSOR DESCRIPTION
The knock sensor (KS) system uses a flat response 2-wire sensor. The sensor uses piezo-electric crystal technology that produces an AC voltage signal of varying amplitude and frequency based on the engine vibration, or noise, level. The amplitude and frequency are dependant upon the level of knock that the KS detects. The engine control module (ECM) receives the KS signal through a signal circuit. The KS ground is supplied by the ECM through a low reference circuit.

The ECM learns a minimum noise level, or background noise, at idle from the KS and uses calibrated values for the rest of the RPM range. The ECM uses the minimum noise level to calculate a noise channel. A normal KS signal will ride within the noise channel. As engine speed and load change, the noise channel upper and lower parameters will change to accommodate the KS signal, keeping the signal within the channel. In order to determine which cylinders are knocking, the ECM only uses KS signal information when each cylinder is near top dead center (TDC) of the firing stroke. If knock is present, the signal will range outside of the noise channel.

If the ECM has determined that knock is present, it will ****** the ignition timing to attempt to eliminate the knock. The ECM will always try to work back to a zero compensation level, or no spark ******. An abnormal KS signal will stay outside of the noise channel or will not be present. KS diagnostics are calibrated to detect faults with the KS circuitry inside the ECM, the KS wiring, the KS voltage output, or constant noise from an outside influence such as a loose/damaged component or excessive engine mechanical noise.

Feb 24, 2011 | 2006 Chevrolet Cobalt

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