Engine fault detection points

     Engine work is not stable, it has a direct impact on vehicle and the driving force of economic, and the comfort of passengers, the vehicle's emission increase, and so on, so when the engine of a vehicle of political turmoil, we have to determine its fault The reasons, to return to normal working methods. Check the following steps:

     1, should check the spark plug and cylinder-line. The spark plug the gap with the original technical standards, sub-cylinder line of resistance is also in line with technical requirements, which do not meet the need to adjust or replace.

     2, the need for a fuel pressure system testing. Check the fuel pressure gauge and oil pressure gauge components, and the oil pipeline linking table. Start the engine idling and make it into operation, fuel reading should be 270 ~ 320 kpa range. If the pressure beyond the technical specifications, the need to replace the fuel pressure regulator and fuel filters.

     3, check-cylinder nozzle. To enter the idling engine running, respectively, each nozzle disconnect plugs, check whether there are changes in their idling, if the nozzle off each cylinder, idling reduce basically the same, then the normal work of Nozzle. When a certain disconnect Nozzle, the engine idling and stability not change, you need to plug the nozzle measuring whether the resistance values of 10 to 13, if we do not meet the standards will replace the nozzle.

     Of course, the need for PGM-FI relay and the main connecting point between the plug wire inspections and Plug connection with the nozzle whether there is a rupture between the wires connecting the poor, such as failure.

     4, fuel pump and fuel pump circuit inspection. Fuel pump inspection: Unscrew the fuel Covers, ignition switch in the ON position, in addition I can hear the fuel pump operation of the voice, under normal working conditions, when the ignition switch in the ON, the fuel pump should be running two seconds 10 minutes. If the fuel pump is not functioning, the first check whether the insurance pump burned. Check PGM-FI relay and plug the main terminal between the on-and so on.

     5, followed by the pressure to check the cylinder, intake and exhaust doors of space, fuel vapor control solenoid valves, EGR valve cylinder work, whether the intake manifold leak, and so on.

     Engine instability caused by many reasons, therefore, in practical work to carry out analysis in accordance with specific circumstances, the reasons for failure to accurately identify and resolve the problem.