My 96 Camry V6 now has a knock in the top of the engine it is in the very front right corner of the engine, the puzzling thing is there is no knock when idling or at high RPMs its just there when its at about 1000 RPMs if it was a push rod or lifter won't it be there all the time?

SOURCE: 91 Camry surging

You maybe need to adjust the idle speed, on top of the intake manifold, near where it says EFI, there a small black rubber plug, pull it out, turn off everything in the car, then turn the screw in where the plug was to change the idle speed. Or it could be that you need a new Idle Control Valve

SOURCE: 1990 Toyota Celica GTS. Idle races too high

sound very much like a vacuum leak.... also maybe your timing is off? possibly advanced? try retarding it with the distributor if thats the case...

SOURCE: idles to high

You may need an Idle Air Control Valve (a common problem), I would also change the thermostat as well. If its reading cold it will cause the car to idle high.

SOURCE: 1993 Toyota Camry V6 Timing Settings

Get a T belt from toyota. It has 3 white lines on it and and arrow mark. 2 lines are solid and one is broken. Put the arrow facing away from the engine. The cam gears have a dot punched into them near a certain tooth. This is where the solid white lines will line up with. The crank gear will have a dot also. It will line up at 90 degrees from the top, towards the front of the car. This is where the broken line will match up with. With the belt installed with all lines on their proper dots and arrow away from the engine, you valve timming is correct.
Of course you need to remove and compress the tensioner also. I assume you know this already since you didn't ask.

SOURCE: Need to locate knock sensor on 1999 camry V6. Where is located.

i have toyota windom 4vz-fe i need locate knock sensor