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Spark Control Computer Spark Test

  1. Bring engine to normal operating temperature ensure that basic ignition timing is properly adjusted. 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. See Spark Advance Test Specifications table. Specifications given in table are TOTAL advance (initial advance is included).
  3. If computer fails to obtain settings, replace computer.
SPARK ADVANCE TEST SPECIFICATIONS - 2.2L (1)

Application Computer Part No. (2) Advance
High Altitude (Auto) 5226499 39°
Federal
Automatic 5226497 42°
4-Spd Manual 5226589 39°
5-Spd Manual 5226587 39°
California
Automatic 5226465 42°
Manual 5226591 42°
(1) Engine speed of 2000 RPM and 16 in. Hg applied.
(2) All readings plus or minus 4°. If amount of advance differs from emission label, use label as accurate listing.
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