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As each injector is energized a fuel pressure gauge is observed to monitor the drop in fuel pressure. Install your aftermarket fuel injectors.
The basic manifold fuel injection system consist of a fuel pump fuel pressure regulator fuel lines fuel filter fuel rail fuel injectors and the engine control unit or engine management system.
How to change a fuel injector. How to Replace Fuel Injectors in Your Car - YouTube. The fuel rail is held in place by screws or bolts depending on your cars setup. Remove these screws or bolts.
If your wiring travels over the top of the rail see the next step to disconnect the wiring first. With everything disconnected from the rail pull it away from the fuel injectors. Lift the fuel rail off of the intake manifold bringing the injectors with it.
This takes a good amount of force as the injectors are attached to the rail and the sprayer tips are a snug fit in the intake manifold. Dont use so much force though that you deform or bend the fuel rail. Make sure not to misplace the wires that you pulled off.
Now that the space in your engine is clearer you have more access to the fuel injectors. Be extra careful as you pull off the fuel injector from its place. Once youve pulled the fuel injector out you can replace it with a new one.
These are the simple steps to replace a diesel fuel injector. Install your aftermarket fuel injectors. Set your injector size setting in your tuning software to the new injectors published flow ratesize.
Hold the throttle steady at 3000 rpm and adjust the injector size setting higher or lower until you reach the same airfuel ratio that you wrote down in step 3 above. Damaged Injector O-Ring. Replacement fuel injector seals and washers are cheap and are fairly easy to install.
This can often fix the problem and if you are handy with a wrench its not that difficult to do. It is fairly inexpensive to have your car injectors. Unplug the electrical connectors for the fuel and vacuum switching valve.
Remove the engine wiring harness clamp and the air conditioning compressor clutch connector with a socket wrench. Remove the two fuel rail mounting bolts with a socket wrench and lift out the fuel rail with the injectors. Insert the injector into the injector hole in the head.
Install the hold down collar onto the injector hold down studs. Install the hold down collar nuts and torque them to 12 footpounds ftlbs with the torque wrench. Install the injector fuel line and tighten it down loosely.
Install new ones with NEW o-rings you DID buy some right into the fuel rail. Install the retainer clips. Give the injectors a good pull to make sure they wont shoot off if you installed the clip wrong.
Adjust or reseat clip if necessary and repeat until its solid. Reinstall fuel rail and seat the injectors into the manifold. Position the injectors into the openings in the manifold and press the rail down until the injectors are seated in the manifold.
Install and tighten the 10mm retaining bolts securely and reconnect the fuel lines. Reconnect the injector wiring harness to the injectors and reinstall the air filter housing. Prime the fuel system by turning the.
Another effective test is to measure the pressure loss in the fuel rail when each injector is fired and pulses for a set period of time. Use an electronic injector pulse tester for this. As each injector is energized a fuel pressure gauge is observed to monitor the drop in fuel pressure.
Pull the fuel rail back and upward to remove the fuel injectors from the cylinder head ports. Rotate the fuel rail so that the injectors are positioned downward and then remove the fuel rail. The last thing that you want to do is ignore the warning signs that the fuel injectors need to be replaced due to the damage it can cause your engine.
When the fuel injectors are in need of replacement here are some of the things you will start to notice. The Check Engine Light is on. Your engine continuously misfires.
So the fuel injectors on your car will last for between 50000 and 100000 miles. But if you need to replace the old fuel injector with a new one on a do it yourself basis with intermediate skills it will take you between 1 to 2 hours. How to Replace A Fuel Injector.
The basic manifold fuel injection system consist of a fuel pump fuel pressure regulator fuel lines fuel filter fuel rail fuel injectors and the engine control unit or engine management system. Manifold fuel injection systems on average operate at about 45 Psi Pounds per square inch Side feed and top feed fuel injectors are used in.