Sinister_Z28

OK so my car has been sitting for like 2 1/2-3 months and i didnt start it or drive it cause i was waiting on parts. Now i got all the parts in and on so i went and took it around the block. The highest RPMs the car went was like 3700. So when i got home i saw i had a SES light and i got my scanner and it said both knock sensors had low voltage so could bad gas cause this?

Zlow28

iTrader: (11)

Its possible, but i dont think 3 month old gas would cause knock sensors to go bad. Swap in some new gas and reset the pcm to see what happens

salemetro

iTrader: (5)

Bad gas will not cause a low voltage reading. Gasoline never even comes in contact with the sensors.

My guess is a corroded ground or harness pigtail.

Sinister_Z28

So what exactly does a low voltage knock sensor code mean. Does it mean the knock sensors dont have enough voltage to operate. Or does it mean i might have have some engine knock. I believe my plugs are to hot. Im running stock plugs from auto zone. Didnt even think about it until now and my static compression is 11.2:1. What plugs should i be running. Also i cleared the code and let it idle for like 10 minutes and i didn't get any codes. Ive been meaning to ask. Why do i sometimes get a code without the SES light coming on?

blackbirdls1

iTrader: (5)

Man check those sensors, hell even replace them if you get to, I just had taken apart my manifold and replaced some sensors, but didn't think to do the knock sensors even though they are fine, and they weren't in my budget but after all the work of taking everything out its something you should do if you can.