Knock Sensor Re-Wire

[teedoff00]

Hey guys,
I just have a quick question. I am doing my KS re-wire tomorrow and I got confused by some of the research I have been doing on the forum when compared to the info found on supra.com. Do you need to ground the thin-net cable in both the engine by and by the ecu (on both ends) or just one. I read in a couple of places that people who did the re-wire where still getting the code when grounded at both ends. So one or two?
Thanks guys

 

[j3pz]

when i did mine, i just went ahead and grounded both ends, figured it couldnt hurt any. also no code for me.

 

[suprahero]

I bought my kit from Shaeff on here and I grounded it under the dash and I havne't had a code 52 since then. I highly recommend his kit. It's as good as it gets.

 

[Whasian]

I used usb cable on my car when I did the rewire. I made sure to ground both ends of that wire. The reason why people who did the rewire but were still getting code 52 way becuase of either a back connection or not having a good ground for the shielding.

Whasian

 

[jetjock]

The factory wiring grounds the shield only at the ECU. The reason for that is to avoid a ground loop. I'm not saying you'll have problems by grounding both ends but good electrical engineering practice dictates it shouldn't be done, at least not in DC or low frequency circuits.

 

[suprahabsfan]

shaeff rocks! His kit is top quality, and his directions are thorough, any questions ask him! He's very knowledgeable and willing to help!

 

[teedoff00]

hey guys thanks for the quick replies! I will ground it by the ecu and see how it goes.
Thanks again!

 

[suprahero]

JJ, I hate to tell you this, but I actually understood your post. Those focus factor pills might be paying off............:biglaugh:

shaeff rocks! His kit is top quality, and his directions are thorough, any questions ask him! He's very knowledgeable and willing to help!

:word8kn:

 

[Whasian]

The factory wiring grounds the shield only at the ECU. The reason for that is to avoid a ground loop. I'm not saying you'll have problems by grounding both ends but good electrical engineering practice dictates it shouldn't be done, at least not in DC or low frequency circuits.

Can you show me something that explains this becuase I'm a ciruit breaker technican for Eaton Electrical, and it was explained me that no matter what the current or frequency is, that you always ground out shielded wires.

Whasian

 

[suprahero]

Do you have to ground them out twice though or is one time at the ecu not sufficient? Mine runs perfectly with them grounded out at the ECU.

 

[shaeff]

JJ is stating that you should only ground one side, not both. Grounding both sides creates ground loops, which, as he also stated, might not make a difference in this application, but shouldn't be done anyhow.

Also, thanks for the props.

 

[jetjock]

Can you show me something that explains this becuase I'm a ciruit breaker technican for Eaton Electrical, and it was explained me that no matter what the current or frequency is, that you always ground out shielded wires. Whasian

What Shaeff said. Google "ground loop" for more info. Ignore the references to aviation. While I'm intimately familiar with both I'm happy to say I've yet to suffer the embarrassment of the second.

Btw, I'm not sure but I think a BSEE trumps a CBT