EOCing problems
 

I have an '09 Sonata, 4 cyl, 5 spd. I have EOCed it using the ignition switch on a regular basis since new. It now has 110K on the clock. Last week, I did a typical EOC on a downhill stretch on the interstate. After popping it into 5th, I got a flashing CE light and it seemed to be running on 3 cylinders.

I pulled off at the next exit. Shut it off, restarted. No CE, running like new.

WTF?

I have not EOCed it since.

Any ideas?

A few weeks ago I did get a solid CE light after an EOC while on cruise control. It ran fine during this stretch for a few miles. When I disengaged the cruise and lifted the throttle, the CE light cleared.

Would installing a FI cutoff switch possibly avoid these problems? I really should as 09 Sonata headlights go off with the ignition switch, making ignition switch EOCing at night kind of interesting.

Do you have any way of checking for codes? That may give you anindication of what happened.

Sounds like a good choice until you get it figured out.

It's been many hundreds of miles since. Would the codes still be stored?

Same thing happens in my KIA I just kill it again and bumpstart again and it goes away. I got a code for the fuel injectors. It probably thinks something is wrong because the engine keeps cutting out.

Some codes are retained even if the light goes off.

And you need a kill switch it will change your life lol.