Tech Tip: Sign of Low Refrigerant
Join Dave Hobbs of Delphi Product and Service Solutions as he discusses some signs of low refrigerant in moodier automotive AC systems. He goes on to discuss how environmental factors such as ambient air temperature, and the AC system’s ‘cycling switch can cause low refrigerant like symptoms.
2.4L Toyota Misfire Under Load Tech Tip
Bill Fulton presents this tip clip video on what would seem to be a basic, simple problem. A 2.4 liter Toyota in a Toyota Tacoma pickup truck with an intermittent misfire under load. You can feel a slight hiccup, jerking, bucking type sensation and know there are a lot of things that could create that problem– dirty injectors, contaminated mass airflow sensor, lean density misfire, excess of EGR, secondary ignition problem. Watch to find out.
Tomorrow’s Technician 2012 Automotive School of the Year Program Underway
Annual program recognizes the top automotive schools in the nation.
P1745 Tech Tip
In this excerpt from the 2011 ATSG Seminar class, Instructor Wayne Colonna talks about 41TES and 42RLE VLP transmissions with a P1745 DTC. These codes are usually the result of a problem with a pressure control solenoid that should be reducing line pressure at idle.
Valve Timing Case Study Tech Tip
In this excerpt from Dave Scaler’s complete training program ‘Base Engine Analysis,’ Dave shares a quick case study on a Pontiac Grand Am with a Quad 4 that came in with misfire DTCs. He discusses the diagnostic procedures and details of the compression test on this vehicles Quad 4. He gives some best practices and helpful hints for dealing with valve timing issues like those exhibited in this case study.
Lambda Tech Tip
In this tech tip, instructor Bill Fulton gives you a quick modern day tech tip that you don’t see on their scan tool. It’s called Lambda. This is what we call the corrected air-fuel ratio. He discusses Lambda, how it differs from manufacturer to manufacture, and what numbers to look for.
Tech Tip: Powerbalance Testing
In this tip clip, Bill Fulton discusses the theory and evolution of power-balance testing. Providing insight, techniques, and how it all applies to modern cars, Bill shows you how to better pinpoint fuel balance problems.
FREDS Tech Tip: SCI Interface FKTC
In this tip clip, Dave Hobbs talks about what to do if you have a vehicle with no PCM data. You plug in your brick, and you go to pull codes or look at PIDs in this late 90s, whatever, early 2000 Chrysler. It’s got CCD. You think you’re talking on the CCD. You’re actually talking on SCI, and scan tool just sits there and says no communications. What could the problem be? Is it a bad scan tool? Bad computer? Bad bus wires? Well, in this clip Dave gives some quick pointers on what to look for next.
Alternative Load Test Techniques Tip Clip
Instructor Dave Hobbs talks about voltage drop testing issues where the circuit you’re testing doesn’t really have the current flow going through it like it should. It may not be due to the fact you have a big voltage drop from a large resistance source in the wiring or the connections. It could be a couple of problems. It could be the wiring and connections, in addition to a component that’s either inoperative or not drawing enough current as it normally would. In this tip clip we talk about these things and some alternative ‘MacGyver like’ load testing techniques you can try.
