Folks-
I'm seeing in my log there are a few knock sensor counts when the sensor isn't even physically connected.
Any ideas what would cause this?
Folks-
I'm seeing in my log there are a few knock sensor counts when the sensor isn't even physically connected.
Any ideas what would cause this?
-Phil, in Charleston, SC
'89 S10 Blazer: SOA SAS: Dana 44s, 5.7L V8, 700R4; 35s, 4.10:1; TBI with 1227747 ECM
'94 Grand Cherokee: 4.0, 4" lift, 31s
'90 Jeep Cherokee: In progress: 5.7L V8,700R4,NP231C, D44s. TBI with 1227747 ECM
'87 Fiero GT: 3.8SC (initial research stage)
You have to provide +5V reference voltage to the knock sensor input. An open wire will be interpreted as constant knocks. Please refer to a wiring diagram for your ECU to find out which pins to connect.
Issue has since been resolved via harness repair. Also, there was only one wire going to it..
-Phil, in Charleston, SC
'89 S10 Blazer: SOA SAS: Dana 44s, 5.7L V8, 700R4; 35s, 4.10:1; TBI with 1227747 ECM
'94 Grand Cherokee: 4.0, 4" lift, 31s
'90 Jeep Cherokee: In progress: 5.7L V8,700R4,NP231C, D44s. TBI with 1227747 ECM
'87 Fiero GT: 3.8SC (initial research stage)
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