Sportage sounds a click or plop after turning it off

Hello gentlemen, I write to you from Chilito to see if you can help me with a sound that is bothering me and a couple more things. The first when I turn off the kia sounds a click or plop ... I do not know as if something plastic is uncovered, k then after it is hot in each accelerated sounds as if something scrapes with something, it is only in the accelerated ones and after several km tours it is walking on "three legs" as it is told here, with idii shot, before it only went down to 800 and up to 600 rrv. At 1200 sometimes, it occurs to me that it is some sensor, because it is not always stopped.
I ask you for help because there are very few mechanics here in the majority there are only parts changer and if you have no experience in the vehicle, you tell you that they find the fault.

As data. Very recently they uncovered the radiator that was covered and changed the centrifue with the bowl incl.

Kia Sportage Grand II 2001.
Very grateful

Dear friend
According to the fault features you indicate, it is very possible that your vehicle has problems with spark plug cables
Since as indicates the revolutions are low
- If the engine thrown into reling is the real cause of your fault
If not, I suggest you send me more details and I help you
My email is
GREETINGS

Thanks friend ... I'll change the cables and let you know.
A hug