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Old 07-30-2014, 10:46 AM   #1
Dr. octagon
Scooby Specialist
 
Member#: 171127
Join Date: Feb 2008
Chapter/Region: MAIC
Location: Union Station
Vehicle:
02 Kinugawa'ed
Rotated T67

Default Knock sensor wire broke (wire comming off harness) use rca cable?

I noticed my accesport was not reading fine knock at all and then discovered that the wire coming off the wiring harness to the knock sensor plug in was hanging on by one copper thread. I went to a spare harness and hacked off the plug in and some extra length to solder back into the harness.

I striped and soldered the plug in back on but now fine knock and feeback knock are reading different than before.

On the accessport before the wire broke, fine knock would read "continuous"....kind of like looking at aem wideband cycling.


Now, knock sensor is reading.......but it seems in single events.

I don't know if the lack of shielding on the solder job has anything to do with it. Does it matter what gauge rca shielded wire I use to redo the job?


Basically this happened, but I have more length of wire to work with than whats pictured............and yes I read the thread

http://forums.nasioc.com/forums/show....php?t=2175398
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Last edited by Dr. octagon; 07-30-2014 at 10:51 AM.
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Old 07-30-2014, 11:00 AM   #2
Dr. octagon
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Member#: 171127
Join Date: Feb 2008
Chapter/Region: MAIC
Location: Union Station
Vehicle:
02 Kinugawa'ed
Rotated T67

Default

Should be mentioned.........I have NO cels with concern to the knock sensor..........none.
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Old 07-30-2014, 11:02 AM   #3
ride5000
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Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

since current flow through the circuit is vanishingly small, the gauge of conductor should have no effect on the knock sensor signal.

the shielding is important to preserve the very small amplitude.

can you get a picture of your splice?
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Old 07-30-2014, 11:13 AM   #4
Dr. octagon
Scooby Specialist
 
Member#: 171127
Join Date: Feb 2008
Chapter/Region: MAIC
Location: Union Station
Vehicle:
02 Kinugawa'ed
Rotated T67

Default

I can get a picture later this afternoon. It should be mentioned that:


a. I am not good at electrical.........it scares me

b. I have a tendency of ****ing up things/making them worse


Do you believe that I should give this a second shot or is it okay given no cels.

The first time I tried to fix it I used crimping connections and was greeted with knock sensor high cel.

Soldered and got no cel.
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