The backfire can rupture the intake manifold. The rupture of the intake manifold can displace a fuel line, pulling an injector out of place, and causing a fuel leak and possible fire.

Fuel System, Gasoline — Delivery

Summary

On certain passenger vehicles equipped with 3800 V6 (L36) engines and certain delphi fuel pressure regulators, the regulators have a much higher than usual rate of fuel leaks. A leak can allow fuel to enter the intake manifold through a vacuum line. If the engine does not start when cranked, the fuel from the leaking regulator and a mistimed spark can cause a backfire.

Actions

Dealers will install new fuel pressure regulators with improved diaphragms. The recall will be conducted in phased mailings. Phase 1 began on June 30, 2004, and phase 2 began on September 30, 2004. Owners should contact Buick at 1-866-608-8080, Oldsmobile at 1-800-630-6537, or Pontiac at 1-800-620-7668.

Documents (16)

• Defect and Noncompliance Notice(Part 573)
• Fax Acknowledgement
• Owner Notification Letter(Part 577)
• Remedy Instructions and TSB
• Updated Defect and Noncompliance Notice(Part 573)
• Fax Acknowledgement
• Manufacturer Notices(to Dealers,etc)
• Owner Notification Letter(Part 577)
• Remedy Instructions and TSB
• Quarterly Performance Report
• Quarterly Performance Report
• Quarterly Performance Report
• Quarterly Performance Report
• Quarterly Performance Report
• Quarterly Performance Report
• Manufacturer Notices(to Dealers,etc)

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