ok so where is the knock sensor located at on an 83 camaro z28?...and wat colored wire goes connected 2 it?...plz help any body thanks...pics will help big time...

 

It's screwed into the block's drain plug fitting at the bottom of the block, passenger side, along the oil pan rail about mid-way along the block. About an inch and a half around. You can see if from underneath slightly above and in front of the starter. It utilizes a "squeeze and pull" type connector (if it's not butchered, as they often are) with a single wire going to it. Should be a black wire and black connector, if memory serves.

 

ok thanks......i have another question...wat does the knock sensor do?...

 

It's the computer's "ear" that listens for a specific frequency through the block that would indicate a detonation condition (spark knock). When it hears it the ECM and electronic spark control module work together with the computer controlled distributor to reduce timing advance to eliminate the detonation condition.

If you're worring about it not working properly on a non-stock engine (larger 350 or 383 in place of a 305) or with aftermarket heads, intake, etc., DON'T BE. While there are slight differences between 305 and 350 sensors as well as some other stuff in the system, my experience is that they will ALL work on a non-stock motor, even with larger cubes.

The system never gave me any indication of being either hyper-intelligent or hyper-sensitive. I've used both stock 305 and stock 350 knock sensor systems in engine swap scenarios to 383s and even 400s. It always seemed to work just fine on the bigger motors, even though it wasn't specifically designed for them.

Please note you will get differing opinions on this- I offer only my personal real-world experience.

Certain things CAN cause problems with them... Anything that causes unusual "noise" through the engine block. Like gear drives, loose brackets that bang against things, exhaust systems that hit the frame, or anything with some size and weight that bangs against the engine can cause a "false knock" signal from the knock sensor system.

 

ok thanks all of this is new to me...this is very valuable information to thanks...