Chery A5 fault, please help solve it.

Problem description: There is a problem with the original oil-gas dual-purpose vehicle of Chery A5: 1. Now that the oil and gas are working, the engine is shaking seriously. In July this year, the oil nozzle was cleaned and the 1 air nozzle was replaced, but the engine has not been improved. 2. The water thermometer is at zero, and there is no water temperature. Water thermometer alarm, EPC alarm, and the fan keeps turning. So far, I can't find it. Maintenance before the problem occurs: the first cause of the problem cannot be found after the maintenance! You clean the throttle of Chery A5, if it doesn't work! Pull out the cylinder lines of the four cylinders respectively after starting! Generally speaking, any car that is pulled out will shake badly! If one is unplugged and there is no response! It's just a cylinder. No! Do you want to change the spark plug! If this is normal! Then the ignition time is wrong! Adjust the belt again! The second one is very simple! The water temperature sensor is broken! At the water tank! Try another one!