Basic Testing Procedure
- An electronic fuel feedback tester (ET 501) is available to aid in system diagnosis. If tester is not available, test No. 1 should be performed first, then tests No. 3, 4, 6, 8A, 8B and 9. These series of tests will provide a thorough system diagnosis.
- The steps listed in the charts will provide a systematic evaluation of each component that could cause a malfunction. After completing a repair, repeat the test to ensure that the malfunction has been corrected.
- Before performing any of the tests, make sure that the following related systems are operating properly:
- Basic carburetor adjustments.
- Mechanical engine operation (plugs, valves, rings).
- Ignition system.
- Intake manifold, carburetor or base plate gaskets.
- Loose vacuum hoses or fittings.