Diesel injectors are a very important part of diesel engines. They started life as a simple single spring injector and slowly got more complicated. After the single spring injector came the dual spring injector to reduce engine noise. I always wondered, if some efficiency was lost to make the engine quieter. To enable the ECU to read engine timing, a magnetic lift sensor was added. To meet more stringent emissions standards, high pressure common rail injection came along with very precise solenoids. Pressures kept on going higher and higher. The next iteration added piezo solenoids to enable more pulses and injection cycles. There are pre-injection pulses for niose reduction and post injection to burn cleaner.
Injectors can fail in many ways. Common rail injectors can slowly start backflowing, which means leaking fuel back to the tank. The internal valve can also completely fail cutting off high pressure to all of the injectors at the same time, which kills the engine. Injectors can also start to put out either too much or too little fuel resulting in a rough running engine.
If you have any of these problems, it's time to replace your injectors.
Here are the diesel injectors for sale here:
  028130122B TDI Injector Fuel Return Valve   028130201T TDI Injector   028130202J TDI Injector   028130202P TDI Injector (OEM Bosch Part)   028130202P TDI Injector   028130203F Bosch TDI Injector (OEM Part)   Used 028130206 TDI Injector Hold Clamp   03L103113 Injector Sealing Cap (OEM Part Removed From Engine)   03L130216 Injector Tensioning Plate (OEM Part Removed From Engine)   Rebuilt 0445110023 Injector   Rebuilt 0445110169 CRI Injector   Rebuilt 0445110070/170/6110701687 Sprinter CRI Injector   New Bosch 0445110192 Injector   Rebuilt 0445110217 Common Rail Injector   0445110340 Rebuilt Common Rail Injector   Rebuilt 0445110522 CRI Injector   Rebuilt 0445110540 Common Rail Diesel Injector   Rebuilt 0445110561 Injector   Rebuilt 0445110564 Common Rail Injector   Rebuilt 0445110597 BMW CRI Injector   Rebuilt 0445115059/060 Injector   Rebuilt 0445115061 Mercedes Injector   Rebuilt 0445115077 BMW injector   Rebuilt 0445116028 Mercedes CRI Injector   Rebuilt 0445117008 Chevy CRI Injector   Rebuilt 0445117010 Chevy Injector   Rebuilt 0445117035 Injector   Rebuilt 0445117036 Diesel Injector   0445117024 Rebuilt Ford 6.7 Injector   059130216C Injector Tensioning Plate (OEM Part Removed From Engine)   0445117005 Rebuilt Injector   059130277CP / 0445117033 Rebuilt Diesel Injector   ROT130813N DSLA150P672 .157 mm TDI Injector Nozzles (Set of 4)   068130201K VW TD Mercedes-265 Injector   187 Injector Nozzles 0 433 175 058 (Made in Italy)   3mm Camplate Shim   Rebuilt 0445110163 Injector   New Bosch TDI Injectors Set of 4 - 3x 028130203F 1x 038130202C   Bosch 2 467 010 003 Rebuild Kit (OEM BOSCH Part) with ROT945816M Tool   Injector Nozzles 0 433 175 1247 (Made in Italy)   068130219 1.6 1.9 Injector Heat Shields (Set of 4)   N0445113 Stud (OEM Part)   046130219A TDI Nozzle Washers set of 4   Rebuilt 190 Bar TDI Injectors Set of 4 (187 Nozzles)   Rebuilt 220 Bar TDI Injectors Set of 4 (187 Nozzles)   ROT145716D Nipple Fitting Banjo Bolt Copper Washers
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