Articles by G. Jerry Truglia

Ever wish you could actually see if there was a restriction in a radiator or condenser? You can, if you use a thermal imaging camera.
The vehicle in question is a 2002 Chevrolet S-10 4WD with a 4.3L (vin X) engine. The customer complaint is a “Check Engine” light that is on steady and flashes while driving. 
Anything that negatively affects the combustion process will create a misfire. I refer to these negative effects as simply the three Ls.
Wiring diagrams are like road maps. You wouldn’t take a cross-country trip without consulting a map or a GPS, would you? But many techs will dive blindly into an electrical diagnosis without first consulting the schematic.
The No. 1 codes in the country are the P0420 and P0430 (Catalyst Efficiency Below Threshhold) diagnostic trouble codes.
Let’s start off this month with a few general tips before diving into a case study involving a 2007 Ford F150 VCT (Variable Cam Timing) problem.
In this month’s column, we take a look at suspension dos and don’ts, offer tips on running stubborn monitors and share a lesson learned by one of our TST members.
  This month, I’ve got a few simple, but maybe not so obvious, tips to share with you. After that, TST member Ed Hazzard offers a few lessons learned working in the bays.
You understand your tools, and have a general plan of attack. But every so often, you’ll find letters and numbers in places you don’t expect them. 
This month, TST members share some of their personal diagnostic stories. Consider the process they used to successfully complete the repair as you read them. How would you have approached these problems?