The car failed to start a month ago. And it was started again by
spraying some starting fluid. However, it failed the emission
inspection. Reason: Oxygen sensor not ready, EGR not ready, Catalyst
not ready. The ECM does not have any error code. When I check the
ignition timing with OBDII scan tool, it reads 63 BDTC from ECU when
idle. Using timing light ignition timing is unstable during idle.
However, it become 0-9 BTDC when rev engin to over 1000 rpm. The
specified ignition timing should be 8 BTDC. I checked the engine
coolant temp sensor, throttle position sensor,  camshaft position
sensor, changed the oxygen sensor. Nothing corrected. I then checked
the crankshaft position sensor. It turns out that the crankshaft
position sensor does not receive any voltage (Should be 5 volt
according to the Haynes repair manual). So, I assumed the ECM has a
problem. But the problem still exists after I replace the ECM. Any
suggesionts? thanks