Warren Brown and Lou Ann Hammond chat about cars on www.washingtonpost.com June 29, 2012

We always have left over questions from the previous chat, and I try to find out as much as I can.

We left off on the last chat with someone asking about failures in High Pressure Fuel Pump (HPFP) in Diesel Vehicles. There does appear to be a NHTSA investigation open about this subject. We are trying to find out more for you.

Vehicle Make / Model: Model Year(s):

AUDI / A3 2010

VOLKSWAGEN / GOLF 2010

VOLKSWAGEN / JETTA 2009-2010

VOLKSWAGEN / JETTA SPORTWAGEN 2009-2010

I have contacted VW and Bosch, the provider of the fuel pumps. The most important part for you, the consumer, is to know “The bulletin states that “fuel system damage incurred by use of fuel not complying to ASTM-D-975 Grade 2 S15 (B5 or less biodiesel content) standards will not be covered under warranty.” What that says to me is if you use homemade diesel your car is no longer covered on a warranty.

This investigation is not limited to Volkswagen and Audi. The Department of Transportation (DOT) is requesting information from all the car companies that sell common rail diesel engines, including Mercedes-Benz, BMW, Chrysler, Ford and General Motors.

Once again, be careful of the diesel you are putting into your engine. You could end up invalidating your warranty and getting metal shards in your fuel line.

Another reader wrote in to give a clarification on the Escape versus Explorer: the Explorer, which was riding on a modified Ranger platform and now is on Ford’s D platform (it’self a derivative from a Volvo S80). The Escape was originally based on the Mazda 6 platform, derived from the Ford Mondeo (an updated Ford Contour platform) – and now, it is riding on Ford’s C platform, so it is now related to the Focus (and some other vehicles).

Click on Warrens picture to go to the washingtonpost.com chat:

warren_brown Warren Brown and Lou Ann Hammond chat about cars on www.washingtonpost.com June 29, 2012 Automobiles and Energy Diesel Manufacturers Suppliers Warren Brown Washingtonpost.com

About the Author:

Lou Ann Hammond is the CEO of Carlist and Driving the Nation. She is the co-host of Real Wheels Washington Post carchat every Friday morning and is the Automotive, energy correspondent for The John Batchelor Show and a Contributor to Automotive Electronics magazine headquartered in Korea. Hammond is a member of the North American Car and Truck of the Year (NACTOY), Women's World Car of the Year (WWCOTY), and the Concept Car of the Year.