Question about 1994 Lexus Es 300
I would like to know the exact location of the Knock Sensor on a 1994 Lexus ES300.
Posted on Jan 07, 2009
I do not recommend to do the knock sensor on V6 engines yourself , if you don't have mechanical skills. You will end up towing car to mechanic shop , it's not that easy as the guy saying here.
He might be right about wiring , yes maybe knock sensor is not bad , but once you there it's worth to repl. both knock sensor and wire harness which is $50.00 from dealer.I know knock sensors are expensive ~ $170.00 a piece , but sometimes testing sensor manually when it's exposed can mislead you if problem intermittent.
Good luck to all of you.
Posted on Apr 16, 2010
READ THIS FROM A OWNERS FORUM BEFORE YOU DO THE SENSOR, THEY ARE OVER $100 FOR THE SENSOR, $3-400 TO REPLACE IT.
1 That's SK's way of telling you should search first. Knock sensors are covered on every Toyota/Lexus v6 forum to death.
2) 1mz-fe's (ENGINE TYPES) are notorious for having over sensitive knock sensors. You should run your tank of gas low (18.5 gallon tank), refill with high octane fuel & reset the ECU (Pull the EFI fuse a second & replace)
3) 90% of the time the wiring is damaged - the knock sensor is fine. A knock sensor is nothing more than a piezo in a metal housing. Nothing to break less a mechanic does it during repairs, or the sensor shorts out (that falls under bad wiring).
4) It's a two piece intake manifold, some wires, some hoses, some cables, a fuel rail. Not engineering a new insulation foam for the space shuttle that the EPA says is "environmentally friendly".
You need a normal set of tools:
Normal & deep well metric sockets. Specifically 10, 12, 14 mm with extensions
Lexus provides cheap chrome coated wrenches 8/10, 14/16 mm in your tool pouch
If you're smart; you'll get a brush & some type of strong cleaning agent, and clean the entire upper intake air chamber (the actual name for the upper intake), including everything connected to it. (Throttlebody, ISC & EGR valves)
Have some RTV silicon on hand incase you break a paper gasket.
Posted on Jan 07, 2009
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