Question about 2006 Jeep Liberty

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Jeep engine is knocking - 2006 Jeep Liberty

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This engine has two knock sensors that plug in under hood back of manifold drivers side the sensors are located under intake manifold that needs to be removed if sensors or wireing is damaged a good mechanic can change one in about one hour or less

Posted on Aug 30, 2010

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Have a 2004 jeep grand cherokee and when i push on the gas peddle it makes a knocking noise and the heater seems to have gone out at the same time


Heater 'gone out' = low coolant. Knocking noise = internal engine damage? Maybe low coolant = internal engine damage.

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Have a knock in my 2000 2.5 jeep cherokee just had the head rebuilt new lifters and pushrods can't ajust rockerarm it's torque to the right setting


I'm not sure where your knock is coming from, but If you rev your engine up and the knock becomes faster and louder you may have a bad rod bearing. If this is the case and you haven't ran your engine too much it is possible to put a new set of bearings in it and you'll be ready to go. But it is possible that you have spun a bearing and the crank would be ruined. Hope that's not where your knock is. Hope this helps, Jeff Horton

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Where is the knock sensor located on my 92 Jeep Cherokee 4.0L straight 6 4WD?


I don't see the knock sensor on the 4.0L engine. --- COMPONENT LOCATIONS Fig. 1: Electronic engine control component locations - 2.5L engine shown 91074g07.gif
Fig. 2: Overhead view of the (A) automatic idle speed motor, (B) MAP sensor, (C) crankshaft position sensor wiring harness, (D) air temperature sensor, and (E) throttle position sensor - 1992 Cherokee with the 4.0L engine shown 91074p15.jpg
Fig. 3: Electronic engine control component locations - 4.0L engine shown 91074g08.gif
Fig. 4: Electronic engine control component locations - 5.2L and 5.9L engines (Part 1 of 2) 91074g05.gif
Fig. 5: Electronic engine control component locations - 5.2L and 5.9L engines (Part 2 of 2) 91074g06.gif
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Sep 30, 2010 | 1992 Jeep Cherokee Briarwood

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Have a 98 Jeep Cherokee,engine light is on ,has a knock when it accellerates, have an y ideas??? (sounds like engine knock).


have truck scanned for trouble code most auto stores such as auto zone/ advanced auto do it for free code gives u start point as to knock which is where code is coming from most knock noise is lower engine problems rod knock-wrist pin -main bearing going

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What is a knock sensor in my 2006 jeep commander with the hemi?


the knock sensor is a sensor that detects any abnormal engine knocking/ pinging, (pre-detonation) caused by low octane fuel or lean air/fuel mixtures. When it detects a pre-detonation knock it sends this information to the PCM and the PCM will normally ****** the ignition timing to prevent damage to the engine. However if it is detecting a knock from say bad bearings it can ****** the timing all it wants and it will not help anything. At this point you have a mechanical failure.

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Check engine light keeps coming on...test says its from the knock sensor...sensor has been replaced, but check engine continues to come on...have always used premiun gas...do have a airaid cold air...


it could be that the wiring to or from the knock sensor has a prob. also after the knock sensor was changed was the code cleared? if it was not it may be a inactive code that stays in the computer causing the light to stay on...

Aug 01, 2009 | Jeep Wrangler Cars & Trucks

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Diagram or location of knock sensor


Look under exhaust manifold on drivers side, closer to rear of engine . mounted on engine block.

Jun 01, 2009 | 1995 Jeep Cherokee

1 Answer

2002 jeep liberty 3.7 engine where is knock sensor located and can the knock sensor cause it not to start.


get the pcm computer checked first for errors.
The 2 knock sensors are bolted into the cylinder block under the intake manifold. The sensors are used only with the 3.7L engine.
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c15280221909

what are your sysptoms of no start?

Mar 10, 2009 | 2002 Jeep Liberty

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