Spark Timing Control System

On Maxima and 280ZX, disconnect Gray harness connector from distributor. On all others, ensure all vacuum hoses are in good condition and properly connected.

Fig 1: Sentra, 210 & 310 Spark Timing Control System
Courtesy of NISSAN NORTH AMERICA, INC.

Fig 2: 200SX Spark Timing Control System
Courtesy of NISSAN NORTH AMERICA, INC.
Place transmission in neutral or "Park". With engine cold, connect timing light. Start engine and note timing. Continue to operate engine and note temperature gauge and timing.
As needle of temperature gauge reaches middle position, timing should advance from former position. If timing does not perform as described, replace thermal vacuum valve.