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A number of things can cause the CEL to illuminate, but if it only lights up briefly and then goes out, it is sometimes just an imtermittent O2 sensor code. I noticed it happening more often when my SVX was parked outside on cold and humid nights and I just start up and drive off under light throttle, but it would go away when I let off. The is not the only cause of an intermittent CEL, but it is a common cause from what I've seen.
As for the non-start condition, was it cold and humid last night? Have you tried the flood clearing mode? Floor the gas pedal, then crank the engine a few times for 5-10 seconds and let of the gas immediately when it catches. If it starts, then it was probably flooded. If not, then you've at least eliminated one possibility. Some people also recommend changing the engine temp sensor for hard start problems, but it doesn't work for all cases, at least not in mine.
KuoH
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