Terrible title.
Sooty plugs implies lack of air (blockage) or seriously over-rich condition.
The run-on sounds like dieseling - timing is way off (timing chain not indexed correctly) or excessive carbon build-up in cylinders.
Both could be related.
I'd verify timing chain indexing first.

 

Thanks for your message. Title amended. On timing, crank was at tdc and camshaft adjusters aligned so the marks on outer edge horizontally lined up across inner center between the two and chain on links next to marks by sprockets. Also it was running like this before the timing chain was done. The run on will happen even if it has only been run 15 seconds from cold. Not enough time for any carbon to get hot enough to "Pink"
This is the procedure I used for the timing- https://kiamanual.com/kia-rio-yb/timing_chain-431

 

Bad injector spraying too much fuel to engine?

Can you read lambda sensor readings when it runs?

Im jus diesel idiot....

 

Hi. Turning the car over with the injectors removed, They appeared to be squirting just fine, but they have all been replaced anyway as it's on 117k so why not?

 

if the throttle is used it dies like putting hand over the air intake on a carburettor engine.

Perhaps there is excessive back pressure in the exhaust, usually caused by a failed catalytic converter. A quick and dirty test for that is to remove the upstream O2 sensor from the exhaust. That will leave a big hole in the exhaust upstream of the cat to allow the exhaust gas to escape. If the engine is able to rev up with the sensor removed you can feel pretty confident your dealing with a plugged exhaust.

I would also take a look at the MAP value when the engine is not running to check that it's displaying a plausible value. It should show atmospheric pressure KOEO (approx 100kpa). If that checks start the engine and see what the value drops to when the engine is at idle. It should drop to something like 40kpa at idle and increase as you open the throttle.

The other thing to look at is the fuel trims. Let the engine idle for a few minutes first though to allow the fuel system to switch into closed loop control. What are the fuel trim values with the engine at idle?

If I helped you fix it, why not...

Your support is greatly appreciated​

 

Perhaps there is excessive back pressure in the exhaust, usually caused by a failed catalytic converter. A quick and dirty test for that is to remove the upstream O2 sensor from the exhaust. That will leave a big hole in the exhaust upstream of the cat to allow the exhaust gas to escape. If the engine is able to rev up with the sensor removed you can feel pretty confident your dealing with a plugged exhaust.

I would also take a look at the MAP value when the engine is not running to check that it's displaying a plausible value. It should show atmospheric pressure KOEO (approx 100kpa). If that checks start the engine and see what the value drops to when the engine is at idle. It should drop to something like 40kpa at idle and increase as you open the throttle.

The other thing to look at is the fuel trims. Let the engine idle for a few minutes first though to allow the fuel system to switch into closed loop control. What are the fuel trim values with the engine at idle?

If I helped you fix it, why not...

Your support is greatly appreciated​

Hi. I've not tried checking for back pressure although it had recently occurred to me. I don't know anything about fuel trim values. Is that in the live data on the code reader? What should the values be? I'm used to pre injection mechanics. Cars seem to have so many other ways to mess up these days! Timing, air, fuel, spark, it should **** well go! I'm just old and don't get complicate!.