Vibe FWD L4-1.8L VIN L (2005)
Steps 20 - 25
The numbers below refer to the step numbers on the diagnostic table.
1. The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool, if
applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later
reference.
6. This step checks the fuel pump for a worn bearing or a binding impeller. The pump should have a smooth and steady low humming sound. A loud
humming or growling noise may indicate a faulty fuel pump. Check a known good vehicle in order to compare pump operation.
12. The fuel system can not maintain constant fuel pressure with a leak in any of the following areas:
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The fuel pump check valve
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The valve or valve seat within the fuel pressure regulator
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The fuel injectors
17. This step checks whether the fuel system is leaking between the fuel pressure gage and the fuel injectors or between the fuel pressure gage and the
fuel sender assembly.
20. This step checks for additional conditions that can cause low fuel pressure other than a faulty fuel pump. Check for any restrictions or blockage in
the fuel feed lines and hoses, including those inside the fuel tank. Check the fuel pump electrical circuit for excessive resistance. Proper fuel pump
operation requires correct voltage and adequate current flow.
23. Check for rust and other foreign materials in the fuel tank. Clean or replace the fuel tank as necessary.
