i have a 95 4runner it is running bad, runs rich and shakes bad has no power at all, and the only code i have is code 52 knock sensor, engine has about 15,000 miles on it long block from toyota i put it in last year and it ran great until now could the knock sensor make it run like it is? also cut exhast before the cat thought that could have been the problem but no differece

 

hmm does sound like the knock sensor also when you cut the exhaust off did the o2 sensor get removed

 

yeah but runs the same as before i cut it out and i put the exhaust back together and i didnt get o2 sensor code thanks for the help i will change knock sensor and wire since i have read others and wire seems to be a problem

 

the wire is easy. the sensor is about 8 solid hrs of wrenching ... good luck

 

i have been having almost the same problem. 95 truck with 3vz-e that's running rich and it shakes a lot of doesn't have much power but the code i get is 26 (rich) i have done a tune up and pulled out the 02 senor and it looks fine. any ideas on what it could be or what i should look at next?

 

You already have a thread on this: https://www.yotatech.com/forums/f116...g-rich-222433/

So OP, your O2 sensor is GONE? Not good.

knock sensor is a PITA & will make it have ZERO power as it reduces your spark advance to 0 degrees BTDC.

 

Just look up the thread on relocating the knock sensor. Get one cheap on ebay or at a junk yard and buy a new wire from the dealer. Then you just need to drill a hole in your rear engine hoist hook and thread tap it. screw your new KS in there and plug 'er up to the harness. 30 min. job instead of 8 hrs! I did this on my new 4runner and the code disappeared. I'm a little worried about the sensor's ability to detect knocks from the 1, 3, and 5 holes but I retarded the timing a little to 5-7 degrees BTDC to take care of any possible knocking.

 

the knock sensor is a pain to get to....but it's NOWHERE NEAR 8 HOURS OF WORK.


i could be to my knock sensor and have it out in about 30-45 mins..

takes me like 3mins to take the upper intake manifold off, maybe 20 minutes to get the lower off, then a few minutes to get at the sensor.

 

Well, I guess I was exaggerating a little bit. But either way, reloacating it is WAY less of a hassle. Plus ya don't need all the gaskets and stuff. Grab the parts at a junkyard - save time and money.