Evaluation: Start of injection display (actual)

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V.A.G 1551 display	Possible cause of malfunction	Corrective action
Earlier than 3 ° BTDC	Engine too cold	Run engine at increased speed to warm up and repeat check.
	Injection pump set too "advanced"	Dynamically check and adjust: Start of injection → Start of injection, dynamically checking and adjusting
	Cold Start Injector N108 inoperative	Check Cold Start Injector N108 → Output Diagnostic Test Mode, performing
Later than 2.0 ° ATDC	Injection pump set extremely "retarded"	Dynamically check and adjust: Start of injection → Start of injection, dynamically checking and adjusting
	Injection adjustment blocked	Check Cold Start Injector N108 → Output Diagnostic Test Mode, performing
	Cold Start Injector N108 inoperative