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Spark Control Computer Spark Test
- Warm engine to normal operating temperature. Disconnect carburetor switch or unground it. Be sure coolant temperature switch/sensor is connected and working properly.
- 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.
- If computer fails to obtain settings, replace computer.
Spark Advance Test Specifications
| Computer Part No. |
Spark Advance |
| 5213437 |
51-59° |
| 5213438 |
46-54° |
| 5213480 |
41-49° |
| 5213481 |
43-51° |
| 5213482 |
41-49° |
| 5213483 |
41-49° |
| 5213486 |
40-48° |
| 5213542 |
51-59° |
| 5213544 |
46-54° |
| 5213546 |
39-47° |
| 5213546 |
27-35° |
| 5213594 |
33-41° |