Note the fuel pipes which are all the same length,
requiring coils on the front cylinders.
The pipes are actually 3 layers of tubing with an
internal dimension of only 1.5 mm.
There are no known replacements for the pipes. The
pipe clamps and brackets are necessary to protect the pipes from
The front four high pressure pump outlets feed the
left side of the engine; the last four feed the right side.
8 throttle plates must be synchronized and completely closed with the
engine fully warmed up. Idle air is provided from the idle/air mixer
with small vacuum hoses that connect to the throttle bodies downstream
of the throttle plates.
Setting the fuel adjusting
solenoid (FAS) must be done at 2800 rpm, never at idle. See our “Billet
Nut and Wrench” that allows setting the FAS with the air box installed.
Injection pump timing is confusing to most owners since
there are two “top dead center” events in all 4 cycle engines. The pump
and distributors rotate at half speed. Ask about our new “Red Dot
Pulley” for simplified pump timing. We have found many Montreals with
the injection pump timing off by 180 degrees which results in a
reduction of power and torque, fuel mileage and increased emissions.
Some pumps require one to two weeks to setup and calibrate, even longer with
the very stubborn ones. Because 8C pump spares and the unique parts are
very rare, we have to remove the plated parts and ship them for
re-plating, unlike the 4C pumps where we have hundreds of spares.
Quality plating is a moving target in that we are always searching for
better service. It's expensive and they do not like doing small volume
plating especially for automotive.