Multec 3.5 Fuel Injector Application Manual
Recommendations and Precautions
Delphi Energy and Chassis Systems
Revision: 11/05-1 7-7
times be less than the maximum on-time calculation above to prevent
hydro-lock.
7.4.2 Vehicle Assembly Fuel System Prime
In some instances, at the vehicle assembly plant an injector prime pulse
sequence is initiated to expedite purging a new fuel system of air prior to
the initial start of the vehicle. For demand fuel systems, the only purge
path for air in the fuel system is through an open injector. The injector
must be commanded on long enough to purge the air from the fuel system,
but not longer than the max on time calculation above to prevent engine
hydrolock if the purge sequence is inadvertently repeated.
7.5
Injector Harness Connector – Corrosion
The USCAR injector connector styles are designed to be submersion –
proof to prevent external corrosive materials from attacking the electrical
terminals. Yet, fretting corrosion can occur from relative micro-movement
between the mating terminals. As a preventative measure against fretting
corrosion, a coating of oil or grease is recommended on the mating
connector terminals:
Recommendation
Nyosil M25 oil or Nyogel 760G grease terminal lubricants are
recommended on the harness connector to guard against terminal fretting
corrosion.
