5.2L EFC System: Testing: Notes
A malfunction in the EFC system may result in engine surge, hesitation, rough idle and/or poor fuel economy. Before performing any tests, check all vacuum and electrical wiring for proper routing and connections and check for exhaust and intake manifold leaks. If these are in order, proceed with testing.
NOTE:
The Spark Control Computer controls ignition timing as well as air/fuel mixture. Before testing EFC system, perform Spark Control Tests first.