A bullet Toyota van, cold car is hard to start, to be repeated several times before starting. Drive parking time is longer, it is difficult to start, and the hot start is relatively easy.

The engine running, high, medium and low speed is normal. Oil, no abnormal phenomenon, and does not show when performing a self-test failure code. Using routine inspection, oil leaks, fuel pressure is normal, injector test, slightly only found few injector clogging, is not a fault. Feel the injection pipe temperature when the engine is running, and description of each cylinder injection basically normal, may be excluded from the electronic control unit (ECU) is suspected. Circuit wiring are good, the temperature sensor may have normal, so check your spark plugs. Found removing the spark plug electrode gap is more than 2mm, concave Centre electrodes in galvanic corrosion of people inside the ceramic core. Apparently. Has exceeded the limits of the spark plugs, and replace them with a new set of spark plugs. Since then, even in the cold state, are making good engines, working back to normal.


Analysis: the spark plugs at the bottom under the cab, checks and adjustments more difficult. When disassembling, you must remove the seat cover and wait more associated components and longer spark plug dedicated socket needs to be used and, therefore, easier to ignore. It is understood that the car has been 70000km. Spark plugs using the 35000km will need to be tested and adjusted, if necessary, replaced.

The failure reason is the electrode gap greatly exceed normal values normal f electrode gap is 0.8mm~0.9mm). Vision fire caused difficulties. If you continue to use will be more difficult to start, could not even start. The car can still fire after several starts. Because mixture after repeated compression combustion chamber temperatures, coupled with thick mixed gas was ignited. If a spark plug gap bigger than jumping the fire, it is basically impossible to ignite the mixture, also failed to start.