Join Date: Nov 2012
Location: Nor Cal
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First - Welcome to CT!
How much do you know about the history of this particular Taco?
In particular - how sure are you that the ECM is in fact the original one for this model year / model?
When the ECM was rebuilt - was it tested in any way? Did the rebuilder give any indication that the ECM *should* be working OK?
Here (attached) are:
- The 1995.5 4-cylinder engine control wiring diagram
- The diagnostic procedure for ECM main power
- The ECM terminals layout
You might want to take a look at the EFI Relay circuit. That relay supposedly triggers power to the ECM. If something's wrong with the relay or the circuit, it might be that the ECM is not functioning at all. That should trip a CEL.
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