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Spark Control Computer Spark Test

  1. Warm engine to normal operating temperature. Disconnect carburetor switch or unground it. Be sure coolant temperature sensor is connected and working properly.
  2. Remove and plug vacuum hose at vacuum transducer. Connect an auxiliary vacuum supply to vacuum transducer and apply 16 in. Hg. Increase engine speed to 2000 RPM and wait 1 minute before checking specifications. Advance specifications are in addition to basic advance. See Spark Advance Test Specifications table.
  3. If computer fails to obtain settings, replace computer.
SPARK ADVANCE TEST SPECIFICATIONS - 2.2L (1)

Application Computer Part No. (2) Advance
Federal 5226176 39°
California
M/T 5226124 41°
A/T 5226178 40°
High Altitude
M/T 5226118 42°
A/T 5226166 38°
(1) Engine speed of 2000 RPM and 16 in. Hg applied.
(2) All readings plus or min 4°. If amount of advance differs from emission label, use label as accurate listing.
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