100 series knock sensor #1

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Joined
Mar 25, 2020
Threads
2
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Location
Firestone Colorado
Hello Everyone!

FIrst post on the forum. I recently purchased a 1998 Land Cruiser with 223k miles for $3,000 about a month ago. It was a 2 owner LC with records at the same dealership since it was bought so I'm optimistic that there isn't anything major as it had 44 carfax records at the dealership. It had some issues such as bad tie rods, bad wheel bearing, torn inner tie rod boot and a bad radiator.

All of that has been replaced and I went ahead and had Robbie Antonson install a new radiator and swap out my heater tees for me since I live up near Longmont. You may notice one of the coolant pipes with some coolant gunk near the back below the driver side tee. Robbie noticed it was bent so he had to seal it back up. I just haven't gotten around to cleaning it up yet.

Anyway, it also has a check engine light for knock sensor #1. I did some searching and saw that a lot of the times rodents get in there. I could see just enough under the intake manifold and I definitely had a nest under there. I decided to go ahead and try to tackle this job myself. I don't see any chewed wires but I did notice a disconnected ground in the back so someone has definitely been in here before. I know the service records did state a starter was done at some point. I'm curious if you guys think this would cause the check engine light or if there's a way to test if that knock sensor is bad or not.

I've attached a picture. Also, do those intake tubes seem extremely gunked up? That bolt you see back near the starter and disconnected wire is one of the intake bolts that I had dropped.

Any help would be appreciated!

5160A526-8569-4DF9-8701-C06094AF12E3.jpeg
 
Last edited:
Sorry no one has gotten back on this. I too need some help with the Knock sensor issues. Need the Harness part # for my 99. Need to replace my starter so i figured i'd replace the sensors and harness while it's open.
 
The wire could be broken at the bend or the knock sensor itself could be broken. Lots of heat in that spot...go to local auto shop and get a knock sensor...should be less than $50; otherwise OEM will be $$$
 
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