1982 Mazda B2000 BaseFACTORY OEM SERVICE PROCEDURE

Spark Delay Timing Control System: Description: 626

This system consists of a water thermo valve which prevents vacuum advance until engine coolant temperature reaches 129°F (54°C).

Fig 1: Schematic of Mazda 626 and B2000 Spark Delay Timing Control System
G09323242Courtesy of MAZDA MOTORS CORP.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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