05-5
Section 05 DIGITAL PERFORMANCE MANAGEMENT (DPM) SYSTEM
This enrichment process of the air/fuel mixture
takes place at start-up and during engine warm-
up, and it depends on engine temperature.
The higher the engine temperature upon start-up,
the leaner the mixture.
This enrichment progressively decreases and
takes place during no more than approximately
1-1/2 minutes. Once the engine is started, the
module reduces the solenoid duty cycle. The warm-
er the engine, the shorter the enrichment mode.
If the throttle opening exceeds one quarter, the
enrichment mode is interrupted during the start-
ing process, which allows unflooding the engine.
However, the enrichment mode is restored when
releasing the throttle.
Following the enrichment mode, carburetors are
operating normally, i.e. without additional pres-
sure within bowls.
NOTE:
Calibration is exactly the same on engines
with a DPM Module and those without.
A06I0NS
TO
CARBURETOR
CALIBRATED JET
AIR JET
ENRICHMENT
SOLENOID
FROM AIR PUMP
REAR VIEW
ACTIVE
TO
CARBURETOR
COMPENSATION
SOLENOID
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