As a result, you may have to remove the spark plugs to let them dry. If the injectors appear to be working, but the engine will not start the engine may be flooded. On newer gasoline direct injection (GDI) systems, however, a NOID light is no help. No flashes from the injector circuit when cranking the engine would tell you the (PCM) is not pulsing the injectors. The tool detects digital signals in a circuit and flashes an LED light.
#Extreme injector not opening professional
Professional technicians, use a tool called a NOID light to check injector pulses. If resistance is outside specifications (high or low), replace the injector. Unplug the injector and measure the resistance, between the two terminals. TIP: You can also measure the resistance of each injector with an ohmmeter. If the engine starts when a particular injector has been unplugged that’s the shorted injector that needs to be replaced. TIP: Try unplugging the injectors one at a time and crank the engine to see if it will start.
#Extreme injector not opening driver
As a result, killing any other injectors, that also share that same driver circuit.
On the other hand, too much current flow to an injector may cause the (PCM) injector driver circuit to shut down. So, if the specification calls for 3 ohms and an injector measures only 1 ohm it will pull more current. Typically, when injectors fail, the solenoids often short internally, causing a drop in resistance. Checking Fuses And Voltage If the fuse is okay, try swapping the relay with another to see if that gets voltage to the injectors. But, if the fuse still blows you will need to check the wiring harness, for damage and repair it. Once the system is identified inspect or replace the failed part and retry the engine. So, if there is a blown fuse, check the system it controls. Use a test light to check its continuity.You can pull each fuse out and inspect it.By using switches, people can break or change the circuit allowing them to try and fix the problem and start the car again.Ĭonsequently, there are two methods of checking electrical fuses that protect various components: Luckily, lots of companies are now using easier technology to make sure car owners can fix this themselves. Due to how important the circuits are it’s so crucial that they can be fixed if they break. When these fuses blow, the system they support stops working and the engine stops running.Īs a result, the engine will not start. They help the fuel pump, fuel injection and computer systems from suffering a short circuit.
Fuses are used to protect various electrical circuits, while supplying power to components. So, the injector fuse and relay are usually located in the relay box or power distribution center in the engine compartment. A fault in the wiring harness to the injectors.First, Check For Voltage At The Injectors, When The Key Is Turned Or Button Pushed. So, if there are problems with how the (PCM) performs these functions, the vehicle may not run. The (PCM)’s functions include positioning the crankshaft and controlling the ignition spark and timing. In some cases, a (PCM) problem, will cause the vehicle, not to run at all. In extreme cases, the (PCM) may have failed. When you turn on the key or push the button, the injectors should receive battery voltage.Īlso, the (PCM) driver circuit, provides the ground connection, to energize the injectors. So, a worn-out belt can prevent the Crankshaft-Camshaft Position Sensor from synchronizing causing the sensor to send the wrong signal. The (PCM) uses the trigger signal from the crankshaft position sensor and/or camshaft position sensor to pulse the injectors.
So, the most likely cause, is that the fuel injectors are probably not opening.