106 XR FAULT HELP PLEASE

friends, i have 106xr vehicle, my car had a singing problem for a week but it still hasn't recovered the car was kicking at low speed black exhaust was coming from the exhaust, but I still didn't fix it, but still it did not happen spark plug cables and engine changed valve would have been overhauled, but the problem still continues, if my master finally said I would change the brain, something could be electrical. Please help, please let me know with the information that the vehicle is kicking and stapling in LPG and LPG. & nbsp;

Thanks so much for your help.

There will be someone who will answer your problem, but there is no need to know the answer to each subject and read it.

no problem

WHICH CHANGE THE SPARK PLUG WIRES, WHY DID NOT CHANGE THE SPARK PLUGS, THERE ARE BREAKING IN THE SPARK PLUGS, IT WILL STOP, STOP AND DRUM THE BLACK ...

Have the throat butterfly checked, my grandfather had the same problem in the car, but he did not throw black smoke from the exhaust. The throat butterfly was found to have a problem, and the problem disappeared when it was purchased.

THERE IS THROUGH THE THROTTLE BUTTERFLY THE TRANSFER OF THE CAR WILL ALWAYS UP, WHEN IT IS EMPTY, THE YELLOW SHOOTS THE BLACK SMOKE WHAT?

Throat throttle failure also causes the car to stall and stop at a low speed. We personally lived in my grandfather's 97 model polo. I mentioned in my message above that there was no black smoke. There can be 2 different problems.