PCB is the F20B ECU.
If it's not throwing a CEL, then I'd say you're right... everything that reports back to the ECU should be functional. That leaves a fair amount of potentially problematic stuff, though.
Given your attention to detail so far, I'd assume you're running the correct injectors, and not using the CB7's resistor box. Still, toycar's question is a valid one, as the wrong injectors (or using the resistor box with the right injectors) could definitely cause problems.
Since the other ECUs run the engine with the CEL on, they are running in open loop mode. Try disconnecting the o2 sensor and running the PCB with a CEL on to see if it runs properly. If it runs well, then I'd definitely suspect the ECU or possibly the o2 sensor (or its wiring.)
That is, of course, if the intake manifold gaskets don't fix the problem.
If it's not throwing a CEL, then I'd say you're right... everything that reports back to the ECU should be functional. That leaves a fair amount of potentially problematic stuff, though.
Given your attention to detail so far, I'd assume you're running the correct injectors, and not using the CB7's resistor box. Still, toycar's question is a valid one, as the wrong injectors (or using the resistor box with the right injectors) could definitely cause problems.
Since the other ECUs run the engine with the CEL on, they are running in open loop mode. Try disconnecting the o2 sensor and running the PCB with a CEL on to see if it runs properly. If it runs well, then I'd definitely suspect the ECU or possibly the o2 sensor (or its wiring.)
That is, of course, if the intake manifold gaskets don't fix the problem.
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