74propu
Full Access Member
- Joined
- Aug 8, 2015
- Posts
- 687
- Reaction score
- 242
- Location
- florida
- First Name
- austin
- Truck Year
- 1974 1980 1986
- Truck Model
- c10s/b c10 s/b c10l/b
- Engine Size
- 5.3 / ?/454 tbi
I have a 95 454tbi with a 4l80e 17 bolt pan . I have a code 43 knock sensor ground, open , short to + . I have changed the ecm , knock sensor read out the blue wire from k/s to the ecm no ground found . the wire has continuity from the sensor plug to the ecm .The blue wire at the ecm pin has 2 blue wires I can not find where the 2nd wire go's ??? the egr valve has been deleted out of the wiring harness if that would have anything to do with the k/s . I have found out that there is 2 deferent knock sensor's for this eng/trans setup .1 sensor is for a 16 bolt trans pan the 2nd is for a 17 bolt pan on a 4l80e transmission . So how do I tell what trans and knock sensor my ecm requires ??? I am lost and need lots of help with this.