Diagnostic Aids

Improper fuel system pressure can result in one of the following conditions:

• Engine cranks, but will not run.
• Engine cuts out, may feel like ignition problem.
• Poor fuel economy, loss of power.
• Hard starts.

Fig 1: Chart A-7B Diagram, Fuel System Diagnosis - Pressure Check

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Fig 2: Chart A-7B Flow Chart (1 of 2), Fuel System Diagnosis - Pressure Check

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Fig 3: Chart A-7B Flow Chart (2 of 2), Fuel System Diagnosis - Pressure Check

Courtesy of GENERAL MOTORS CORP.