Re-wire knock sensor?

asc_up · Post by **asc_up** » Tue Dec 04, 2007 12:33 am

replace your knock sensor first, trust me.

then try to rewire it.

vrg3 · Post by **vrg3** » Tue Dec 04, 2007 3:17 am

I'm with Aaron. The wire that typically gets damaged is the one attached to the sensor.

tmarcel · Post by **tmarcel** » Tue Dec 04, 2007 11:12 pm

I wired in one from a WRX. Works just fine. Just needed to tie the shielding from connector and the sensor in just right.

Soobster · Post by **Soobster** » Fri Mar 14, 2008 4:07 am

Anyone know if you can order a complete replacement for the knock sensor wire with the harness from Subaru?

If not, do the newer Subaru cars have the same wiring harness for the knock sensor as the MY 90 to 94?

I just tried to replace my knock sensor, but when I moved the wire around it started cracking all over. I want to either replace the wire completely, or if I can find a wire from another newer Subaru I'll try splicing it.

kleinkid · Post by **kleinkid** » Fri Mar 14, 2008 8:14 am

What I did was buy from a junk yard, the ECU side of the connector where it plugs into the knock sensor with about 6" of wire and spliced. That was the part of my wire that was exposed. A reminder, do not over tighten the knock sensor bolt, 15ft. lbs is plenty. Make sure the mating surface with the block is spotless.

Soobster · Post by **Soobster** » Fri Mar 14, 2008 4:57 pm

ok, sounds like a reasonable solution. Does anyone if I can harvest one of these knock sensor wires from a newer Subaru vehicle. I'd like to pull one from a newer car. I'd imagine that most of our MY cars are having problems with their knock sensor wires deteriorating, and I don't see the point in installing another 17 year old wire in my baby.

kleinkid · Post by **kleinkid** » Fri Mar 14, 2008 7:34 pm

Contact this member, SubaruVanagonguy, he is in the S.F. area. Warren is his name. 415-225-9770

He has stuff.

Mattheww044 · Post by **Mattheww044** » Thu Apr 16, 2009 12:39 am

hey guys, bringing this thread back to life... My situation sounds a little different then most here but with the same problem. When i got the car, the knock sensor was unplugged, with no problems, then i plugged it in, and once i hit boost (around 3k), it just started running like crap almost as if the fuel pump was going out. So i unplugged it, and it ran fine, then it started doing the same thing even with the knock sensor unplugged. Now it just kinda does it whenever it wants, it ALWAYS does it when its plugged in, and only sometimes does it when its not plugged in. So i was told to rewire from the ECU to the connector for the knock sensor itself. The car has a PP6 ECU. So does anyone know where i can buy some of this shielded wire, or should i just go get some from an NA at the junkyard? Napa and autozone had no idea what i was talking about when i asked for shielded wire.... thanks for any help

ericem · Post by **ericem** » Thu Apr 16, 2009 12:49 am

Did you try replacing the knock sensor though?

beatersubi · Post by **beatersubi** » Thu Apr 16, 2009 4:12 am

Some online electrical suppliers have it. Or you could grab a harness out a j/y car. Probably easier and cheaper. There're a few shielded wires in there.

Mattheww044 · Post by **Mattheww044** » Thu Apr 16, 2009 5:18 am

ya i replaced the knock sensor with a brand new one. so if i just go grab the wire out of an NA from the junkyard it will work?

dzx · Post by **dzx** » Thu Apr 16, 2009 6:28 am

i bought some microphone wire from radioshack and rewired the whole thing. Works good.

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

Re-wire knock sensor?

SubaruVanagonguy