Underhood

  • Fuel trim analysis always is a very interesting subject, especially when it comes to using the fuel trims to analyze drivability problems. Have you ever stopped to think about the fuel trim and what it is telling the technician?
  • Is that 30-pound jug of R134a you bought online REALLY R134a?
    Pete Meier
  • Changes in technology for the “David and Goliath” extremes of engines used in both hybrid passenger cars and light-duty diesel trucks definitely will ruin your day if you don’t know how they operate. 
    dave hobbs
  • Winning races without spending money on performance upgrades is really tough (but not impossible) to do, which is unfortunate for drivers with passion or talent but very limited funds. 
    Motor Age Magazine
  • Ford has been producing the Power Stroke for many years. In mid-1999, it made a significant change in the design by adding additional electronic controls.
  • Hybrid electric vehicle (HEV) nickel-metal hydride (NiMH) battery service or replacement is a topic often written about or discussed in the automotive trade magazines today. 
  • Using the incorrect brake fluid could result in an accident and legal liability.  Wrong transmission fluid can lead to poor shifting or worse regardless whether it’s an automatic or manual box.
  • Some folks will drive vehicles for many a mile with inoperative power steering or brakes. 
  • I thought it appropriate to offer a print primer on scopes and their use as a diagnostic tool. I’m no power user, just an average guy like the rest of you.
    Pete Meier
  • Variable valve timing and variable displacement systems have been on the road and continuously evolving for years. 
    dave hobbs
  • Has this ever happened to you? A customer calls telling you that her car’s Malfunction Indicator Lamp (MIL) is on and she’s worried about what she needs to do.
    Pete Meier
  • The use of pressure transducers in automotive service bays is one of the most exciting discoveries of the 21st century
  • A wise vehicle owner will recognize the axiom that a dime’s worth of prevention is worth a hundred dollars worth of cure.
  • One of the smartest techs I know always checks customers’ air conditioning systems during the winter months, long before the first hot day arrives. 
    Motor Age Magazine
  • Mention diesel and racing in the same sentence and I conjure up images of Smokey and the Bandit. But mention those same words to Audi engineers, and you’ll get an entirely different response.
    Pete Meier
  • Turbochargers are relatively simple machines and are very reliable overall.  But like everything else, things can and do go wrong, and automotive service professionals are called on to make them right again.
  • Why is it that our heavy-duty cousins can get so much more life out of their coolant fills than we can?
    Pete Meier
  • One reason for the price difference in R134a is a practice called “dumping,” which occurs when a foreign company sells a product in the U.S. at less than its fair market value.
    Pete Meier
  • 2003 and up, Dodge vehicles equipped with the diesel engine and the 48RE transmission may have a complaint of a partial engine stall at a stop followed by a sudden engine rpm increase.
  • April marks the beginning of a new A/C season for many. Now is a good time to take a look at how to properly service these systems, as well as other parts of A/C service you might not expect to see.