As long as it is running. The engine cannot function if fuel is not being injected into the cyclinder.
It would be a good idea to add a bottle of fuel injector cleaner to your gas tank at every 3000 mile service. Other than that, your fuel injection system should not need any other service.
Fuel injection systems do not need to "bled." However, if Questioner is actually trying to ask, "Should I relieve pressure in a fuel injection system before performing fuel system maintenance?" then the anwer is yes.
Throttle body injection should have 41 to 47 psi. Central fuel injection should have 60 to 66 psi.
92 b2200 ,fuel injection psi should be 38 to 46 psi
twice a year
The recomeended service at 15000 miles and may also vary depending on the make and age of your vehicle. Recomendations from customers for reliable service are priceless. http://www.yelp.com/biz/diesel-fuel-injection-service-portland-2
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Fuel injection
Fuel injection.
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