Recommendations and Precautions
Multec 3.5 Fuel Injector Application Manual
7-2
Delphi Energy and Chassis Systems
Revision: 11/05-1
Figure 7-1 - Thermocoupled injector
7.2
Durability
Injector flow performance will vary over its usable life due to mechanical
wear and deposit build up. This variation must fall within defined
acceptable limits over the application’s target life. Injector performance
may vary as follows:
•
Injector flow rate may shift over the life of the injector due to engine
vibration, friction or wear (accelerated by fuel contamination).
•
Set point flow shifts are most commonly the result of changes in
injector opening and closing response.
•
High alcohol fuel or poor quality fuels may accelerate internal injector
wear.
•
Excessive build-up of deposits on the director may result in a lean
shift.