My 4wd Saph was fine when I put it in to hibernation in October. Pulled it out for the summer and It’s had fresh fuel and started but ran really rough with vibrations and wouldn’t rev. It got worse after 30 seconds or so and now won’t even start.

I have already changed the rotor arm and distributor cap. There is fuel to the rail and spark at the plugs.

When the car was running with vibration I did see a 1+ 3 error code but now showing nothing code wise now it won’t even start.

I believe 1 + 3 code is shown as ‘ignition timing signal (ECU internal)’. Does this literally mean ECU problem or could this be CPS?

Thanks in advance.