.......possibly important news but so far VW is blaming misfueling.
David Shepardson / Detroit News Washington Bureau Federal safety regulators stepped up an investigation into nearly 100,000 Volkswagen and Audi diesel vehicles over fuel pump failures.
The National Highway Traffic Safety Administration said today it had upgraded its investigation into 97,272 diesel 2009-10 Volkswagen Jetta, 2010 Volkswagen Golf and Audi A3 vehicles. NHTSA said it's received 160 complaints; approximately half of the reports said the failure resulted in an engine stall incident, with many of these alleging stall incidents at highway speeds in traffic with no restart. There has been one minor crash alleged to have resulted from a high-pressure fuel pump failure.
NHTSA opened a preliminary investigation in February.
VW told NHTSA it had "found no defect related to motor vehicle safety with relation to the TDI Clean Diesel fuel system at issue in this investigation" and attributed problems with fuel pump failures to operation with gasoline contaminated diesel fuel. Volkswagen said "even a small amount of gasoline in the diesel fuel may disrupt the necessary lubrication required and may cause" the fuel pump to fail. VW issued a technical service bulletin in May 2010, telling dealers to inspect the diesel fuel for vehicles requiring fuel system service that have symptoms associated with fuel pump failure.
The bulletin said "fuel system damage" by using the wrong fuel will not be covered under warranty.
Volkswagen told NHTSA about 120 fueling incidents — including 20 reports involving incorrect fueling by dealer sales or service personnel and generally report symptoms such as rough running, stalling and/or no start within a few miles of refueling the vehicle with gasoline. Separately, NHTSA opened an investigation into whether other automakers used air bags that have been recalled by General Motors Co. In December, GM said it was recalling 95,927 2005-07 Cadillac CTS vehicles because some of the vehicles' sensing systems may not work and could fail to detect a front passenger's presence. That would disable the front air bag and could reduce protection in the event of a crash. GM is also providing additional warranty coverage for the air bag issue to another 62,867 2005-07 Cadillac CTS models not covered by the recall.
NHTSA said GM's supplier that made the faulty part supplied several passenger sensing system mats to other vehicle manufacturers for use in their vehicles. NHTSA said it is notifying "any other companies that might have purchased this equipment, notify them of this defect in any vehicles they manufactured, and to ensure thorough safety recalls are conducted where appropriate."