Knock sensor rewire.
by Dawgz » Tue Jun 12, 2007 10:13 am
I dont know if this has actually been posted in this section, but it is a DIY.
Ive learned this off this board, from many threads.
there is alot of information on this in the thread linked below
http://www.solaraguy.org/viewtopic.php? ... c&start=30
but heres a short way to do it so u dont have to read it all.
If ur boosted and u get a check engine light and u go get the code checked and if it comes out as one of the knock sensors, u've blown ur knock sensor and in turn i believe it is retarding the timing, making the car slow. The good way to fix this is to replace both knock sensors, from what ive read, the replacement knocksensors aren't as sensitive as the stock sensors, and wont set off that easily.
but for a quick temp fix, u can do this mod.
U have to get to the ECU/ECM, which is located behind the glove box, the glove box, here's a diagram of how to do that, and where the ECU is.
once u look at the ecu, u will see the plugs, u want to locate the E11, when ur looking at it at eye level, its the most bottom connector/plug.
What we want to do is look at pin 27 and pin 28, here's a diagram of the ECU's connectors and their corrosponding pins
If the code that ur sensor was throwing was comming from the bank #1, which is the rear sensor, then what u have to do is cut pin #27's wire, give enough slack to each side of the wire because u will need to expose the wire underneath the plastic of the wire. then take off some plastic cover from pin 28 but do not cut that wire, just expose the wire and connect pin 27 to it, firmly, the part that is comming from the ECU, not the wire that leads to the engine bay.
Here's a small diagram of how it looks, and how it should look after ur done.
and now how it should look.
here's a REAL picture of how it should be like.
This is a TEMPORARY FIX, the most likely cause for ur blown knock sensor is either the sensor being too sensitive, or ur running real lean, and or ur actually getting knocking.
Any corrections to this DIY are welcome.
Ive learned this off this board, from many threads.
there is alot of information on this in the thread linked below
http://www.solaraguy.org/viewtopic.php? ... c&start=30
but heres a short way to do it so u dont have to read it all.
If ur boosted and u get a check engine light and u go get the code checked and if it comes out as one of the knock sensors, u've blown ur knock sensor and in turn i believe it is retarding the timing, making the car slow. The good way to fix this is to replace both knock sensors, from what ive read, the replacement knocksensors aren't as sensitive as the stock sensors, and wont set off that easily.
but for a quick temp fix, u can do this mod.
U have to get to the ECU/ECM, which is located behind the glove box, the glove box, here's a diagram of how to do that, and where the ECU is.
once u look at the ecu, u will see the plugs, u want to locate the E11, when ur looking at it at eye level, its the most bottom connector/plug.
What we want to do is look at pin 27 and pin 28, here's a diagram of the ECU's connectors and their corrosponding pins
If the code that ur sensor was throwing was comming from the bank #1, which is the rear sensor, then what u have to do is cut pin #27's wire, give enough slack to each side of the wire because u will need to expose the wire underneath the plastic of the wire. then take off some plastic cover from pin 28 but do not cut that wire, just expose the wire and connect pin 27 to it, firmly, the part that is comming from the ECU, not the wire that leads to the engine bay.
Here's a small diagram of how it looks, and how it should look after ur done.
and now how it should look.
here's a REAL picture of how it should be like.
This is a TEMPORARY FIX, the most likely cause for ur blown knock sensor is either the sensor being too sensitive, or ur running real lean, and or ur actually getting knocking.
Any corrections to this DIY are welcome.
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Dawgz - SolaraGuy Professional Racer
- Posts: 4678
- Joined: Fri Jul 16, 2004 2:28 pm
