2005 Cobalt 2.2
Just removed, rebuilt, and replaced engine. Primed it and all was ready to start but all I get is cranking.
Injector Harness has voltage (5V and 12V) and ground. However no injector pulse. I believe that it is triggered by the crankshaft position sensor through the ECM so I next verified voltage at sensor. I was surprised to find 2.5V on both sides of the connector instead of 5V on one side.
I am more comfortable doing engine mechanical than electrical but I believe having the voltage split like that indicates a missing ground on that circuit. That correct?
I verified continuity from connector all the way to the ECM pin. Also verified wires are in perfect condition.
Does anyone know what would cause the ECM to provide power to both sides of that circuit? Where do I look? Am I on the right track?
I examined the wiring harness extensively looking for any issue. Engine replacement went well and had no pinched wires or any issues. All ground wires are connected and clean. I see none missing.
Thanks in advance for any ideas.
Just removed, rebuilt, and replaced engine. Primed it and all was ready to start but all I get is cranking.
Injector Harness has voltage (5V and 12V) and ground. However no injector pulse. I believe that it is triggered by the crankshaft position sensor through the ECM so I next verified voltage at sensor. I was surprised to find 2.5V on both sides of the connector instead of 5V on one side.
I am more comfortable doing engine mechanical than electrical but I believe having the voltage split like that indicates a missing ground on that circuit. That correct?
I verified continuity from connector all the way to the ECM pin. Also verified wires are in perfect condition.
Does anyone know what would cause the ECM to provide power to both sides of that circuit? Where do I look? Am I on the right track?
I examined the wiring harness extensively looking for any issue. Engine replacement went well and had no pinched wires or any issues. All ground wires are connected and clean. I see none missing.
Thanks in advance for any ideas.