24jeffg

can some one tell me the location of the knock sensor on a 99 4 runner 3.4 sr5, bank one? thanks

24jeffg

Ok found out where they are at,,lol, wow. Does anyone have any manuals or pictures on how to do this job, any help at all, thanks

habanero

There's a really nice write-up around somewhere, unfortunately all my bookmarks fled the coop. It's not on Yotatech, but there was a link on one of the threads, I've just got to remember who it was that had it....
bump or til I remember...

Edit: Still can't remember who posted this link, but here it is-
http://mattshowto.blogspot.com/2009/...44127321246682
Yes, I know it's about fuel injectors, but those are in the same area.

And a thread discussing how it's a lot of times the harness and not the knock sensor itself-
https://www.yotatech.com/forums/f2/9...sensor-143178/

There's also some who've had luck bypassing them and installing their own piezo-electric sensor elsewhere. That you'll have to find for your ownself if interested.
I have no personal experience with knock sensors- yet- other than unplugging them made the truck run funky when I hit around 3,000 rpm. (curiosity, looking for ping)

24jeffg

ok thanks ill keep looking, but if you remember please let me know, thanks

habanero

Edited post above with links and info.

24jeffg

ok just got everything off and took out the old knock sensors, the only thing on the knock sensors are a big 71 under that i got looks like 863 and under that a big m, i dont know witch one to order denso or the other brand that i cant spell or say but starts with an M i think,lol.

rworegon

What is the condition of the knock sensor pigtail wire? The pigtail gets cooked from the engine heat and goes bad, rarely do the sensors go bad.

24jeffg

the wiring didnt look bad at all, (but going to get new ones any way), now the connectors was brittle, but do you know witch sensor to buy?

rworegon

I believe the big M on the sensor denotes MATSUS H I T A. Your local Toyota dealer can confirm since you have the sensor in hand.

The language censor is not liking the company name. Hence, the spaces.

24jeffg

ok thanks alot

24jeffg

Ok called toyot this morning about witch knock sensor to buy for my 99 toyota 4 runner 3.4, and they wanted the vin off the vehicle, so I gave it to them and they said either denso 89615-12090. Or matsu˟˟˟˟a 89615-12040 , both would work, just wanted to pass this along incase someone else comes across this problem.

24jeffg

does anyone know what to torque the bolts on the lower intake, cant find anything, thanks