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Check valve stuck open on mine causing the hot start issue. At least 10 seconds of embarrassing cranking before start up when hot.
Fixed valve and instant hot starts now.
Obviously fuel to main injectors flows back to tank and leaves the system with air that needs to be purged.
Could the cold start injector be positioned where a small supply of fuel is still maintained within a fuel line?
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George in Indiana
928 Weissach #153
Cayenne S
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