CIS system relies on potentiometer on side of fuel distributor to provide signal for needed enrichment to accelerate when engine is cold.

Of course cold start injector, idle air valve, and temp sensor must be working, too.

Search archives for potentiometer.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles