Question about 1994 Jeep Grand Cherokee

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Knocking in engine

While sitting in idle has knocking

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  • hank5899
    hank5899 Feb 25, 2012

    knocking in the engine is not good what is knocking?

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  • Jeep Master
  • 32,281 Answers

If the knocking frequency increases with engine revs then the problem could be worn piston rod bearing.

Posted on Feb 25, 2012

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3 Answers

My acura is making loud banging noise from front when idling. sounds like a missing spark plug but all spark plugs are fine. what could it be?


Can be a lot of things.

Could be a bad rod or rod barring.

Could be a clearance issue in a rebuilt engine.

I wouldn't run it until you Take it to a shop for diagnostic.

Nov 03, 2014 | 1998 Acura CL

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What could be wrong if I hear a knocking in the front of the engine and the engine is hard to start, as well as the engine will not idle?


Automatic idle module isn't working. Isolating the knock is going to be more difficult. There are many reasons an engine knock develops. It will take a good mechanic to tell for sure.

Jul 12, 2014 | 2004 GMC Envoy

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My car is misfiring


I own a 2000 avalon and had a similar issue, rough idle especially when stopped, car felt like it was going to stall. I had a couple error codes which included one of the o2 sensors and knock sensors. I replaced the pcv valve , and o2 sensor, both easy fixes, but tue knock sensor is in the top half of the engine. Cost me 500 bucks to replace, install knock sensor at shop. After knock sensor was replaced and other o2 sensor replaced, no more idle issues. What happens if an o2 sensor on one of

Mar 02, 2014 | 2000 Toyota Avalon

2 Answers

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

2 Answers

Engine knock


2002 KIa Senoda engine. If an engine is knocking it can be that the engine has low idle in fuel pump.because of some reasons that only less gas can enter the engine. that is why you have to adjust the fuel idle until the engine will not knock .

Mar 03, 2009 | 2002 Kia Sedona

1 Answer

Adjusting idle speed ae100 corolla


What is the question, the idle speed or the knock sensor? The idle speed is not adjustable, it is computer controlled, if it has a stalling problem then the idle speed control valve is dirty.
The Knock sensor is just that, it senses what some people call spark knock, some pinging and others cylinder detonation, it sends a signal to the computer that the engine is knocking and the timing is then retarded until the knock stops, it can not completely stop knock but in most cases it controls it well as long as the engine is in good condition and the right grade of gas is used.

Nov 21, 2008 | 1993 Toyota Corolla

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