Investigations
FUEL RAIL LEAKAGE
NHTSA Preliminary Evaluation PE03050 - closed, opened 2003-10-30.
NHTSA investigation PE03050 is a Preliminary Evaluation opened on 2003-10-30 and currently closed. The subject is tracked inside the Office of Defects Investigation queue. Latest activity on this investigation was logged on 2004-02-03 - NHTSA updates that field whenever an Information Request goes out, a supplement is filed, or a status change is recorded in the public docket.
A Preliminary Evaluation like PE03050 is the entry point of the federal defect-investigation process. NHTSA engineers scan complaint databases, field reports, and manufacturer data to decide whether an Engineering Analysis is warranted, whether a voluntary recall is already sufficient, or whether the pattern does not rise to a defect finding.
Investigators summarized the matter as follows: "THE FUEL RAIL ASSEMBLIES USED IN THE SUBJECT VEHICLES WERE MANUFACTURED BY DANA. THE FUEL RAIL JUMPER TUBES WERE MADE OF MONOLAYER NYLON 12 (PA12). IN MODEL YEAR (MY) 1998, THE JUMPER TUBE MATERIAL WAS CHANGED FROM PA12..." Investigations are the early-warning layer of the federal auto-safety system, sitting upstream of formal recalls and defect orders. Whether this one closes without action or escalates into an Engineering Analysis, the full history stays in the ODI archive so researchers, litigators, and buyers can pull the paper trail at any time.
Investigation Summary
THE FUEL RAIL ASSEMBLIES USED IN THE SUBJECT VEHICLES WERE MANUFACTURED BY DANA. THE FUEL RAIL JUMPER TUBES WERE MADE OF MONOLAYER NYLON 12 (PA12). IN MODEL YEAR (MY) 1998, THE JUMPER TUBE MATERIAL WAS CHANGED FROM PA12 TO M-BOND (A MULTI-LAYER PTFE/PA12). IN ADDITION, ALL SERVICE PARTS PRODUCED SINCE THE END OF PRODUCTION 1997 USE THE M-BOND JUMPER TUBES. MATERIAL ANALYSIS PERFORMED BY DANA ON FAILED FUEL RAILS SHOWED THAT THE MONO-LAYER NYLON 12 JUMPER TUBES ARE SUSCEPTIBLE TO ENVIRONMENTAL STRESS CRACKING (ESC). GM BELIEVES THE ESC IS A RESULT OF HEAT, TIME, ALCOHOL BLENDED FUEL, FUEL PRESSURE CYCLING, AND DESIGNED IN STRESS. EIGHT OF THE GM COMPLAINTS ARE DUPLICATIVE OF ODI COMPLAINTS. ODI HAS RECEIVED 77 OF IT'S 123 COMPLAINTS IN THE PAST 12 MONTHS. FUEL RAIL PART SALES OVER THE LAST THREE YEARS RANGE FROM 3.0 PERCENT OF PRODUCTION FOR THE MY 1997 CADILLAC VEHICLES TO 13.1 PERCENT FOR THE MY 1995 AURORAS. AT LEAST ONE OF THE FIRE INCIDENTS OCCURED WHILE THE VEHICLE WAS PARKED WITHIN A GARAGE ATTACHED TO THE CONSUMERS HOME. THE FIRE RESULTED IN DAMAGE TO THE DWELLING AS WELL AS THE TOTAL LOSS OF THE VEHICLE. THIS INVESTIGATION HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS.
About This Investigation Type
A Preliminary Evaluation (PE) is the first phase of NHTSA's investigation process. It is opened when the agency identifies a potential safety defect pattern, usually triggered by consumer complaints, manufacturer reports, or field monitoring. During a PE, NHTSA gathers information to determine whether a formal engineering analysis is warranted.
Data from NHTSA Office of Defects Investigation. Cross-references: NHTSA recall campaign API and NHTSA FARS where fatality records overlap. PlainCars does not rate or recommend vehicles. about how PlainCars sources NHTSA data.
Read our methodology - how this data is sourced, computed, and verified.