Knock sensor wire??
04-22-09, 07:04 PM
#1
Knock sensor wire??
ok on my 87 TII i think its the knock sensor( hexagon shaped sensor on the center iron below oil fill neck) is not hooked up to anything...Its just has one black wire, does it hurt to not have it hooked up?? Also where does the knock sensor wire run too?? does it run out of the same wire loom as the CAS?? cause i also have a single black wire thats not hooked up to anything there also
thanx
thanx
04-22-09, 07:58 PM
#2
If your knock sensor is not hooked up, the ecu will retard the timing alot to be safe.
On the S4, there is suppose to be a gray wire that goes from the knock sensor to the knock control unit. From reading the wiring diagram, it seems that there is a black wire that ties into the gray wire down the line somewhere. That same black wire also goes to the ecu, and the knock control unit. Seems like its a ground wire.
look in the fsm in the wiring section. You can also find the knock control unit in the Fuel Emissions Turbo section page 4B-52
is your oil pressure sending unit hooked up? That black wire is probably that wire.
On the S4, there is suppose to be a gray wire that goes from the knock sensor to the knock control unit. From reading the wiring diagram, it seems that there is a black wire that ties into the gray wire down the line somewhere. That same black wire also goes to the ecu, and the knock control unit. Seems like its a ground wire.
look in the fsm in the wiring section. You can also find the knock control unit in the Fuel Emissions Turbo section page 4B-52
is your oil pressure sending unit hooked up? That black wire is probably that wire.
04-23-09, 06:14 PM
#6
If your knock sensor is not hooked up, the ecu will retard the timing alot to be safe.
On the S4, there is suppose to be a gray wire that goes from the knock sensor to the knock control unit. From reading the wiring diagram, it seems that there is a black wire that ties into the gray wire down the line somewhere. That same black wire also goes to the ecu, and the knock control unit. Seems like its a ground wire.
look in the fsm in the wiring section. You can also find the knock control unit in the Fuel Emissions Turbo section page 4B-52
is your oil pressure sending unit hooked up? That black wire is probably that wire.
On the S4, there is suppose to be a gray wire that goes from the knock sensor to the knock control unit. From reading the wiring diagram, it seems that there is a black wire that ties into the gray wire down the line somewhere. That same black wire also goes to the ecu, and the knock control unit. Seems like its a ground wire.
look in the fsm in the wiring section. You can also find the knock control unit in the Fuel Emissions Turbo section page 4B-52
is your oil pressure sending unit hooked up? That black wire is probably that wire.
04-23-09, 07:03 PM
#7
The ECU won't retard timing if the knock sensor isn't hooked up. It will only retard time if it is hooked up and you start to get knock.
Mine isn't hooked up on my turbo swap, with no effect. Hailers and others suggest not bothering with them since your engine will likely be damaged by the time they work anyway. I tend to agree.
Mine isn't hooked up on my turbo swap, with no effect. Hailers and others suggest not bothering with them since your engine will likely be damaged by the time they work anyway. I tend to agree.
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