3.0 Knock Sensor

[theking11863]

So I've been slowly rebuilding my engine over the last few months thanks to some blown head gaskets/heads and have been having a debate with myself over whether or not I want to replace the knock sensor while I'm in there. There's nothing wrong with the current one (to my knowledge anyway) but the truck has 261,000 miles on it and I don't want to end up tearing the engine apart again for such a little thing. Only thing that's making me not want to do it is the $130 price tag of a new one. The question is how often do these 3.0 knock sensors go out and is it something I should just knock out? I'm already replacing the wire thanks to nice bit of hack mechanics by a previous owner

Sent from my iPhone using Tapatalk

 

[HanginInUtah]

My completely unofficial opinion is that the sensor is usually bulletproof. The wiring is the issue.
But that may be hopeful. I don't have years and years or miles and miles to back me up.

 

[SaulG]

Replace the harness if the intake is off!

 

[goatfarmer]

Bailed my 90 T4r out of the shop yesterday after engine rebuild. Got punked, received a call from shop after engine was assembled, claims the knock sensor tested find beforehand but the 'engine check light' came on so they had to remove components to replace the sensor, said they would only charge 2 hours labor. Food for thought??

 

[dbd6604]

So I've been slowly rebuilding my engine over the last few months thanks to some blown head gaskets/heads and have been having a debate with myself over whether or not I want to replace the knock sensor while I'm in there. There's nothing wrong with the current one (to my knowledge anyway) but the truck has 261,000 miles on it and I don't want to end up tearing the engine apart again for such a little thing. Only thing that's making me not want to do it is the $130 price tag of a new one. The question is how often do these 3.0 knock sensors go out and is it something I should just knock out? I'm already replacing the wire thanks to nice bit of hack mechanics by a previous owner

Buy an official Toyota OEM knock sensor and pigtail, fix the wiring, and be done with it. You don't want to be screwing with this down the road when you could've taken care of it all at once.

Source: Guy who's had a code 52 for 2.5 years.

 

[theking11863]

Bailed my 90 T4r out of the shop yesterday after engine rebuild. Got punked, received a call from shop after engine was assembled, claims the knock sensor tested find beforehand but the 'engine check light' came on so they had to remove components to replace the sensor, said they would only charge 2 hours labor. Food for thought??

Got punked how?

Buy an official Toyota OEM knock sensor and pigtail, fix the wiring, and be done with it. You don't want to be screwing with this down the road when you could've taken care of it all at once.

Source: Guy who's had a code 52 for 2.5 years.

I already bought a Toyota OEM harness which I'll be picking up from the post office in about 10 minutes. The OEM knock sensor's are about $180, not really a pill I want to be swallowing right now. Is it possible tho that it is your wire that went bad?

I contacted my old auto shop teacher/mechanic and asked him about it and he said he's never seen one of these go out and he's never been wrong about any of the problems on this thing. Going to continue doing some more research though.

 

[goatfarmer]

Got punked how?

I already bought a Toyota OEM harness which I'll be picking up from the post office in about 10 minutes. The OEM knock sensor's are about $180, not really a pill I want to be swallowing right now. Is it possible tho that it is your wire that went bad?

I contacted my old auto shop teacher/mechanic and asked him about it and he said he's never seen one of these go out and he's never been wrong about any of the problems on this thing. Going to continue doing some more research though.

Unfortunately, I had to go by the mechanic's word? I have taken a few engines for him to rebuild and seemed fairly reliable, this was a few years ago? In this case, had the shop pull, rebuild, and install the engine, appears only time will tell; hopefully still in business to honor the warranty??

 

[theking11863]

Unfortunately, I had to go by the mechanic's word? I have taken a few engines for him to rebuild and seemed fairly reliable, this was a few years ago? In this case, had the shop pull, rebuild, and install the engine, appears only time will tell; hopefully still in business to honor the warranty??

Yeah having to go off of someone's word sucks. That's a big part of why I learned how to work on cars. It has saved me thousands and has kept me from being screwed. Absolute worse case scenario would be me having to change the sensor later which would only cost me the money for gaskets and a weekend


Sent from my iPhone using Tapatalk

 

[HanginInUtah]

I contacted my old auto shop teacher/mechanic and asked him about it and he said he's never seen one of these go out and he's never been wrong about any of the problems on this thing. Going to continue doing some more research though.

I would agree with him, although my experience on these motors is relatively new. But that seems to be the common message across the boards... sensor is awesome, wiring is not. Probably one reason the sensor costs so damn much since they don't sell very many.