1992 camaro 5.7. I’ve look all over the forums and internet. Did everything and still have the dreaded code 43, I don’t know if that directly connect to my car running rich but I’ve read that it can be the cause. I even ran a direct line from the ecm to the knock sensor. Still no luck.
what I replaced so far.

• knock sensor
• distributor
• ignition coil
• ignition control module
• Spark plugs
• spark plug wires
• MAP sensor
• coolant temperature sensor
• Idle air control valve
• Throttle position sensor
• Fuel filter.
  I threw everything I can think of involving ignition and spark. Can some please shed some light and answer my prays. Thank you.

 

From my experience it pulls timing off idle and more in the higher rpms. Code 43 is usually associated with a KS circuit. Knock sensors from '85 through '92 can physically look alike but the resistance can be different depending on the application. Take a ohms reading center of the sensor to the body of the sensor and it should be ~3.9 ohms. If it's 100k ohms, chances are you have the wrong KS. Been told KS are torque sensitive and over torquing them can damage them or make them oversensitive.
Post #2

 

Oh ok. I never thought about that. I ordered me an oem KS and it’ll arrive tomorrow. I’ll check the readings on my new one before installing. The one I have on right now was a cheap generic brand off Amazon. Hopefully this was the cause all along. I’ll update have an update after my findings. Thanks.

 

Besides the ks being 3.9k ohm make sure head temp switch and ks arnt swapped electrical connections.

 

Yeah. When I first got the car someone cut the wires to the KS and temp sensor, the wires were blue and white. I did some research and people said the blue wire was for the KS and the white one was for the TS. And I believe the KS plug had a blue wire on it. I replaced the old plug for it because I crushed the housing while trying to remove it. The aftermarket plug came with a white wire though. But I think I’m in the clear. Thanks 🙏🏽

 

UPDATE!
so today the oem KS came in. ACDelco part number 213-92. I ordered it from Amazon for about $55. Amazon says it doesn’t fit but it does, I checked by going online to GM parts store, AutoZone, and Orilleys. So took off the cheap off brand KS and switched it with the OEM part. I reset the codes by disconnecting the negative battery terminal. Waited a few mins and started the car up. NO CODES!! Now I have to connect the KS back to the factory wires because I ran a straight wire from the KS to the ecm.

so for whoever is reading this. Please please please, always get OEM parts.