05-8
Section 05 DIGITAL PERFORMANCE MANAGEMENT (DPM) SYSTEM
AIR PUMP OPERATION
1. Regulator
2. Pump
This pump supplies the distribution gallery
through a unique pipe.
The pump diaphragm is activated by the alternat-
ing pressure/vacuum within the engine crank-
case. Two pipes connect the crankcase (cylinders
nos. 2 and 3) to the pump.
A regulator within the pump stabilizes the pump
pressure.
Since the pump pressure is insufficient upon
starting, the regulator is fed directly by the crank-
case pressure.
DPM MANIFOLD OPERATION
1. Manifold
The DPM manifold consists of 2 tubes. Depend-
ing on the mode, the upper tube (distribution gal-
lery) distributes pump pressure or vacuum to
each bowl through 2 pipes. The passage is then
opened by the enrichment or the compensation
solenoid, depending on the mode.
The lower tube (vacuum collector) receives the
vacuum created by each carburetor within the
needle jet air inlet.
An air jet also allows the atmospheric pressure to
enter.
MANIFOLD ASS’Y
1. Upper tube: distribution gallery
2. Lower tube: vacuum collector
3. Air jet
1
A06C3WA
2
A06I0OA
1
A06I0TA
1
2
3
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