The car is a 2000 milly, That originally had a two wire sensor. Girlfriend hits a dog, runs the car hot, Long story short, new motor is a 99, with a bad knock sensor which turns out to be a one wire. So we got the original sensor, and I'm looking at both sensors now. I understand that one wire should be the ground, assuming the red is pos and black with white stripe is neg but the question for that is what do i do? how do i plug this two wire plug into the one wire plug on the car? i removed the orange tab on the inside like a mazda world member told me to but there seems to be no metal wire exposed for the one wire of the plug to touch? i don't get it? do i just cut the plugs out and solder the wires and ground the other one or what!

 

well, i'm confused. checking mazda epc, for the 2.3, there is only 1 part number. for 2.5, there are 2, BUT, the later part number superseeds to KLY1-18-S50, and fits 97-up. checking our 99 wiring diagrams, the 99 2.5 has 2 wires, red and grey/yellow, which seem to join together. the 2.3 has a single white wire. have you possible gotten the wrong motor? iirc, no major changes were done until 2001 my and later. 2000 my and before were basically all the same.

 

well the car is not supercharged, so im assuming its a 2.5 but whats so weird is the knock sensor on this motor is a single white wire, but the one from the other motor is two wires. so i am at a complete loss with this thing and there are parts laying all over my garage haha

 

a single white wire tells me that the sensor is off of a 2.3. if this was a short block, might be someone slammed you with a 2.3 instead of a 2.5. where did the motor come from?

 

I thought the motor came from another car. I am going to the shop where to motor was installed tomorrow, will let you know what I find out. If it was a 2.3 it was running surprisingly well with a regular intake on it, just throwing a knock sensor code!