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RX300 knock sensor replacement DIY

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Old 04-17-13, 12:13 PM   #61
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I'm having a hard time locally finding 'high temp split wire loom.' If you google that term it appears that 'high temp' means 300 degrees; what I can get from my local parts store - claimed to be appropriate for 'under-hood applications' - is rated to 240. Enough?
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Old 04-17-13, 12:36 PM   #62
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I'm having a hard time locally finding 'high temp split wire loom.' If you google that term it appears that 'high temp' means 300 degrees; what I can get from my local parts store - claimed to be appropriate for 'under-hood applications' - is rated to 240. Enough?
Please PM gazi001. He plans to buy 10ft and in the good spirit of Pay-It-Forward both of you can benefit.

In my setup, it the coat hanger metal that conducts the heat and the rest is due to radiation. I was tempted to hide the coat-hanger-wire inside the loom but for this very reason left it outside... it gets hidden by the cover.

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Old 04-17-13, 01:24 PM   #63
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I pm'ed gazi001, as you suggested.
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Old 04-20-13, 01:16 AM   #64
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I pm'ed gazi001, as you suggested.
Jab, I already sent pm to you. I will mail to you the loom free. Give me your shipping address. Good luck.
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Old 04-20-13, 01:36 AM   #65
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Way to go guys.

Remember to vacuum the crumbling plastic, else they might endup in the intake. Gravity sucks.

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Old 04-20-13, 06:28 AM   #66
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Way to go guys.

Remember to vacuum the crumbling plastic, else they might endup in the intake. Gravity sucks.

Salim
Thanks Salim.
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Old 04-21-13, 09:08 AM   #67
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Jab, I already sent pm to you. I will mail to you the loom free. Give me your shipping address. Good luck.
Jab, did you get my pm?
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Old 05-24-13, 10:31 PM   #68
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Default Yikes! Replaced Knock Sensors, now I am leaking coolant!

I went through all the trouble of replacing all the knock sensors (but thank goodness for this DIY) and buttoned everything up and let the engine run for 5 minutes only to find it leaking tons of coolant from the most unlikely location...from the circled plastic box behind the differential (see attachment). Feel like a huge retard! What in the world did I do?
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Old 05-24-13, 11:17 PM   #69
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This is canister but how come coolant coming from it.
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Old 05-25-13, 01:14 AM   #70
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This is canister but how come coolant coming from it.
Figured it out. The reason why coolant was coming from the evap canister is because upon reassembl y I got the evap lines and coolant switched. Boy do I feel like a dumb ****! Such a dumb mistake I made, feel like a complete idiot. I work on cars a great deal and rarely make mistakes -- boy did I eat a big slice of humble pie after realizing my blunder... I think I ate the whole pie. The two hoses are the same diameter and right next to each other so in my haste to reassemble, I did not verify. This is why labeling is so super important.

So at any rate... with the evap canister completely soaked, I had to shop vac with special hose attachment so it would fit the right diameter (I used a length of auto hose that I had on hand, it was the perfect diameter). I let the vacuum run for a full hour until not a single drop was flowing through the shop vac line (used a clear hose attachment so I could see).

I will have to seafoam the engine tomorrow to burn off the coolant residue that is now part of the intake. Not a huge deal, but the whole thing just bites hard.

But if that was not enough, I test drove the RX for 20 minutes after all this and the stinking Knock sensor error came back on... only this time, instead of one error, I have two knock sensor errors, both bank one and bank two. The other rookie mistake I made was I did not replace the knock sensor wiring harness. Really kicking myself now as I think it very well could be that the knock sensor wiring harness is bad and the true cause of the errors. Either that, or the two new knock sensors I bought are both bad right out of the box... not as likely (anyone used aftermarket knock sensors from ebay?).

Anyhow, please learn from my mistakes folks... I will be spending half the day tomorrow trying to rectify this.
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Old 05-25-13, 07:12 AM   #71
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Figured it out. The reason why coolant was coming from the evap canister is because upon reassembl y I got the evap lines and coolant switched.
...
snip.
We all make mistakes and it takes a bigger person to admit it.
Almost all mistakes provide some learning but unfortunately some end up costing us more than just time and hurt pride. With complications you will be wondering what is needed to fix, till all problems are solved.

If you would pardon my piling on..

1. After market sensors
2. Not changing the wire harness.
3. You did not mention gaskets (usually people are tempted to re-use).

With the amount of time to do this DIY, I would not suggest skimping on the parts.

Salim
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Old 05-25-13, 12:36 PM   #72
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I hope you will make things alright. Do you have a picture of hose which you switched by mistake?
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Old 06-25-13, 10:36 PM   #73
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I found the part numbers for the Knock Sensors and harness but my question is, are there two harnesses that need to be purchased or just one?

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Old 06-26-13, 07:36 AM   #74
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One harness. The sensors sit in the middle of "V" bank and they connect the sensors to the main harness outside of the v-bank.


If you can compile and post the list and part numbers it would be a great add.

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Old 06-26-13, 08:16 AM   #75
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Thanks, Salim! Once I get all of them lined up, I'll post the part numbers.
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Old 06-26-13, 08:16 AM
 
 
 
 
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1999, arm, break, clean, cleaner, engine, fuel, knock, lexus, location, replace, rx300, sensor, sensors, shaking, wiper

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