ERIKC DLLA145P870 injection DLLA 145 P 870 denso common rail injector nozzle DLLA 145P870 093400-8700 for 095000-5600

FAQ: Why do injectors need cleaning?

ERIKC Answer:Modern fuels are a complex blend of hydrocarbons and additives, many of which evaporate at different temperatures. Each time a hot engine is shutdown (heat soak), a small amount of gasoline is left on the tip of the each injector. Since the engine temperature is now above 200 degrees F, the more volatile compounds in the fuel evaporates and the less volatile elements dry on the injector tip and form solids. As time goes on, these accumulations grow and start affecting the injector spray pattern and fuel distribution.

Both Turbo and Supercharged engines are very tough on injectors due to the higher intake temperatures and turbo oil getting past the seals and depositing on the injector tips.

Older engines with worn rings and valve guides also contribute to the build-up. This blow-by gets introduced into the intake by the PCV system.

Failure to change the fuel filter and allowing moisture in the gas tank both have detrimental effects on the injectors. Rust can deposit itself below the injector filter and can cause serious problems.

FAQ: Do we modify injectors to increase the flow?

ERIKC Answer:Very few injectors can be modified to increase the flow and still work correctly. Usually the spray patterns will be poor and their flow rates will be very mismatched after modierikcation.

The only injectors we currently modify are the pink or blue top-feed Denso's and the yellow side-feeds that are used in the late model Subaru. These will typically flow within a few percent of one another after modierikcation. We perform this operation using a lathe or mill to prevent injector damage. See our Subaru Mods page page for pricing.