Diagnostic Aids

Water or foreign material can cause a no start during freezing weather. An EGR sticking open can cause a low air/fuel ratio during cranking. Low fuel pressure can result in a very lean/air fuel ratio. A grounded circuit No. 423 (EST) may cause a no start or a start then stall condition.

Fig 1: Chart A3 Schematic, Cranks But Won't Run ("B" & "G" Bodies)

Fig 2: Chart A3 Schematic, Cranks But Won't Run ("F" Body)

Fig 3: Flow Chart A3, Engine Cranks But Won't Run (1 of 2)

Fig 4: Flow Chart A3, Engine Cranks But Won't Run (1 of 2)