My mechanic, a large reputable establishment, replaced #5 fuel injector at a cost of $800. Two starts later I get a service engine light. Codes have not been run yet, but mechanic previously said all injectors should be replaced. I was searching the Internet and saw two references that said the price should be about four to $500/per. Part 4 of 7: Install the new fuel injector O-ring. Step 1: Install new O-rings onto the new injectors. Place the injectors into the intake ports and lightly push them down into place. Step 2: Install the fuel rail onto the injectors. Screw in the mounting bolts, all the way down to hand tight. Let the revamping begin! Understanding Diesel Injectors Before we drill down into the repair process, it’s important to get acquainted with diesel injectors, their functionality, and importance in the diesel engine. Their role is central to the engine’s performance and longevity. Reinstall the injector harness and tighten all the nuts on the injector solenoids. Reconnect the main harness to the injector harness. Depending on how many injectors you have to replace, reinstall fuel supply lines starting with number 6 and working forward. Note that number 4 crosses over number 5 onto the fuel rail. Tighten the fittings. How To Install DT466 Injectors. If you have removed the injectors, then you have all the hard work done. All the parts in the way have been removed and set aside. All you have to do is put the new injectors in the old one's place and use your torque wrench to get the right amount of torque. Oct 21, 2014. #1. The quickest and most reliable way to contaminate a diesel fuel system is to open it up. Never remove lines, pumps, injectors, etc unless all your troubleshooting indicates a failed component. Hard starting and smoke at start-up indicates to me low compression or incorrect injection timing. Injector Return Flow test Hi all, Well I am going to attempt to do the fuel injector return flow test to find if all or any of the injectors are passing too much fuel back to the tank thus lowering the fuel rail pressure and giving P0087 code. Here we show you how to install a fuel injector on a 5.9L Dodge Cummins diesel engine. Learn more from Know Your Parts.Know Your Parts | http://www.knowyour .

how to change diesel fuel injectors