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GOOD! START THE
ENGINE THE NEXT
MORNING TO
RECHECK
SETTINGS**
DOES THE ENGINE
STALL IN THE FIRST 2
SECONDS?
YES
INCREASE
AFTERSTART
ENRICHMENT 5% AT
THAT ENGINE TEMP*
ADD 5% MORE
COOLANT TEMP
ENRICHMENT AT
THAT ENGINE TEMP*
DOES THE ENGINE
STALL DURING
WARMUP?
NO
NO
* The actual amount of fuel that
needs to be added depends upon
how far the settings are off.
**The settings may need fine
tuning as varying cold start
conditions change (summer to
winter, etc.)
START THE ENGINE
YES
DOES THE ENGINE
RUN ROUGHLY DURING
WARMUP?
NO
ADD 2% MORE
COOLANT TEMP
ENRICHMENT AT
THAT ENGINE TEMP*
YES
DOES THE ENGINE
CONTINUE TO RUN
ROUGHLY?
NO
YES
Note: This flowchart is slightly simplified. See
accompanying text for details.
Figure 55 EFI Tuning Guide—Cold Start—After Base Map is Tuned Hot