meir
OBS Enthusiast
hello guys. need some help with diagnosing an issue.
was working the other day on my truck, adjusting timing on the distributor.
engine was running fine, and i know that in order to adjust timing, i need to disconnect the tan/white wire that goes from the distributor to the ECM.
So, I turned ignition off, disconnected the wire, and try to start the engine.
Engine will not start.
I have spark, the distributer the plugs and the wires are brand new.
Checking the fuel, I have no fuel top the injectors. Fuel relay will not click when I turn the ignition on.
Tested the relay, relay is fine (and so all fuses)
Looking at the circuit diagram, it looks like the ECM is supposed to supply 12 volts to the relay when ignition turned on. Doesn’t happen.
So before I pull the trigger on a replacement ECM, can someone tell me what can Couse the ECM not to provide power to the relay?
Thanks in advance.
Meir.
Edit: 89 350 5.7 TBI
was working the other day on my truck, adjusting timing on the distributor.
engine was running fine, and i know that in order to adjust timing, i need to disconnect the tan/white wire that goes from the distributor to the ECM.
So, I turned ignition off, disconnected the wire, and try to start the engine.
Engine will not start.
I have spark, the distributer the plugs and the wires are brand new.
Checking the fuel, I have no fuel top the injectors. Fuel relay will not click when I turn the ignition on.
Tested the relay, relay is fine (and so all fuses)
Looking at the circuit diagram, it looks like the ECM is supposed to supply 12 volts to the relay when ignition turned on. Doesn’t happen.
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So before I pull the trigger on a replacement ECM, can someone tell me what can Couse the ECM not to provide power to the relay?
Thanks in advance.
Meir.
Edit: 89 350 5.7 TBI
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