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RX300 knock sensor replacement DIY

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Old 12-14-13, 08:17 PM   #106
salimshah
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Originally Posted by lexusknock View Post
Hey I recently replaced mine but now oppose to just one sensor being bad both are now saying they are bad any suggestions
Did you buy OEM knock sensors from a reputable place?

Recheck the connector and make sure you hear them snap close.

Salim
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Old 07-13-14, 08:57 PM   #107
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Check engine light is back on. It has been coming on intermittently last year or so, but now it's on solid. Had the codes read yesterday - P0330. What the heck?! I changed both of these and the harness 3.5 years/40k miles ago. When I changed them the first time, both tested Ok, which always raised my curiosity of whether they were actually the problem.

Four situations IMO:

1. The engine is really knocking. Sensors are doing their job and something else is wrong like timing or?... I never hear anything in fact I'm always impressed how smooth she runs with 150k

2. Wiring from sensor harness to main ECM isn't right. Bad ground, bad signal etc.. Guess I could jump all of it If I knew the pin sequence.

3. Bad ECM. Anyone have a loaner?

4. Bad knock sensors. Highly doubt it since they are relatively new and the ones I removed tested Ok.

Gotta get the fixed once and for all. Emission won't pass and as we know, this code shuts down the transmission overdrive

Thanks for any help. Tim
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Old 07-14-14, 03:18 AM   #108
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Just a thought: http://www.clublexus.com/forums/rx-f...ck-repair.html

Last edited by carguy07; 07-14-14 at 03:21 AM.
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Old 01-16-15, 07:46 PM   #109
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Thanks a million Salimshah,took my time broke it down in about 1.5 hours, going to change rear valve cover gaskets and plugs why it is easier to access from this tear down.
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Old 03-01-15, 09:48 AM   #110
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Just want to add. Whenever remove the hidden aic hook bolt, get a longer bolt and put it back with a spacer. So that you can use a wrench to install it or remove it next time. I also added a longer ground and mount it with easier access place.. Thanks
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Old 05-09-15, 08:34 PM   #111
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Originally Posted by carguy07 View Post

This works. Beats knuckle busting, back breaking, down to the gut of the engine knock sensors and harness swap. After all that, my engine MEL'd the same codes 3 years later. Factory parts... If you do decide to do all this work, swap everything you can at that level being plugs, hoses, and left/right valve cover gaskets. If your covers aren't leaking yet, they are either new or about to leak. Then do the above hack.

Tim
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Old 05-14-15, 09:01 PM   #112
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Lower manifold removed. I found it easier to lift out of the way and keep everything connected. I cleaned the injectors also.
How do you clean the injectors?
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Old 05-15-15, 09:23 AM   #113
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Quote:
Originally Posted by av8rga View Post
This works. Beats knuckle busting, back breaking, down to the gut of the engine knock sensors and harness swap. After all that, my engine MEL'd the same codes 3 years later. Factory parts... If you do decide to do all this work, swap everything you can at that level being plugs, hoses, and left/right valve cover gaskets. If your covers aren't leaking yet, they are either new or about to leak. Then do the above hack.

Tim
I would agree here. Doesnt make sense not to do all the extra stuff like plugs, valve covers, etc while the top part of the engine is torn apart.
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Old 05-25-15, 03:19 PM   #114
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Default How to replace Knock sensor Videos

I replaced the Knock Sensors, By pass hose, Harness, Manifold gaskets and clean all fuel injectors few days ago. I made this video for our members.

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Old 05-25-15, 07:59 PM   #115
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Gazi:

Please add your diy to an existing thread (if it exists). If not please add a link to the DIY sticky to your new thread.


To release the pins of the cowl, take a small socket and shove it over the pin. The socket size should match the pin and as you push it on, the spread on the pin is squeezed and the pins come out super easy. [I use 1/4 SAE socket]

Salim
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