I was looking around some threads for a code 43 and everyone is saying that the knock sensor seems to be the problem. Does anyone have a pic of the knock sensor laying around? I just replaced the starter and i think i know which one it is but i couldnt figure out how disconnect the damn thing. Im sure since i pulled the starter out i bumped it so i want to pull the connector and check the voltage and such if not just replace the sensor. Thanks

 

Passenger side block beneath the exhaust manifolds. Shouldn't be hard to find. I can't recall what color the single wire is going to it.

 

squeeze the connector to get it off, it's the one directly in front of the starter, only sensor in the block on that side, the other (fan temp switch) is in the head, and it has the same type of connector on it.

EDIT:
Typo; should read, "only sensors in the block on that side.

The reason I mentioned the temp sensor is because it uses the same typ of connector and can be confused with the knock sensor, some have even unknownly swapped the connectors.

 

Hmmm..I thought the sensor on the right side between cyl's 6 & 8 was a coolant temp sensor. What is the sensor on the left side of the block between cyls 1 & 3?

Also, I may have a 305 sensor on the left side as described above (run a 355), is that harming anything?

 

http://chevythunder.com/fuel%20injec....%20pg%20B.htm

Try this link, there a good pic here. With the sensor pictured here, I know this particular one is located on the left side of the block, right under/between cylinders 1 & 3.

Good Luck.
Eric

 

1&3 is coolant temp sensor for the gauge I believe. 6&8 is knock sensor.

 

Knock sensor is on the bottom of the block at the oil pan rail.

The sensor between the 6 & 8 cylinders is for the cooling fan.