Tech Tip: Radio Hum or Whine Continues After Replacing the Alternator
After replacing the alternator, a hum, whine or buzzing noise is heard through the speakers of the vehicle radio or two-way radio when the fuel pump runs. The in-tank electric fuel pump may be the cause of the electrical noise. In August of 2002, Ford Motor issued TSB 02-16-4 addressing this issue.
Predicting Failures
spect that at one time or another, we’ve all had a customer return with a check engine light on with a new fault code that wasn’t there last time they were in. The events probably went something like this: Customer: “You couldn’t see that when you looked at it last time?” Shop: “No ma’am, there’s
Under Pressure:TPMS Diagnostics
Have you ever noticed the sides of at least one tire excessively bulging on the car ahead of you in traffic? Of course you have. You’ve likely also found a high number of improperly inflated tires on vehicles that roll into your shop on a regular basis. Improperly inflated tires are commonplace. The National Highway
Diagnostic Oddities
This article is dedicated to some Ford specific issues that, after being brought to light, can save your shop thousands of dollars in wasted time and liability. There may be some other makes out there with some similar designs and quirks, but the only technical references will be for Ford vehicles. By Glen Beanard Giddy
Automatic 4WD Hub Replacement
Automatic hubs are used on many 4×4 trucks to disengage the front wheels when four-wheel drive is not needed. Disconnecting the front wheels reduces friction and may improve fuel economy as much as one mile per gallon depending on the vehicle. A one mpg difference may not sound like much, but with gas costing around
Making Sense out of Sensors
Sure, you may be familiar with some basic sensor operation. But as an automotive technician, you may not really understand all of the ins and outs of many common sensors. Do you really understand how they work, how the PCM views them and the possible scan tool and DVOM results when things go wrong? If
Carley’s Corner: Hybrid Hazards
Is E85 motor fuel a corny way to reduce American’s dependence on foreign oil? E85 is being touted as an eco-friendly, alternative fuel that can provide a home-grown solution to reducing our need for imported oil. E85 is a mixture of 85% ethanol alcohol and 15% gasoline. The alcohol is made primarily from corn, but
Getting Tanked: Flex Fuel Engine Modifications Allow for Alcohol-Based Fuel
In case you haven’t heard, Flex Fuel technology is really starting to take off in the U.S., becoming more popular in late-model vehicles than technicians may realize. If you haven’t had any training on these vehicles, you may find some of the technical changes OEMs have made to the engines will alter the way you