Fuel Trims
To gain a better perspective on fuel trims, think about how “analog” vehicles dealt with changing fuel and air mixtures.
Understanding Pulse-Width Modulated Fuel Pumps (VIDEO)
This type of fuel pump uses voltage switched on and off to control the speed and pressure of the pump. Sponsored by Carter.
Drivability Issues Fuel Trim Diagnostics
No code diagnostics are some of the most challenging drivability issues.
Checking Your Fuel (Video)
Fuel systems can have many possible issues to diagnose. This video is sponsored by AP Emissions.
Subaru Injector Misfire
Follow the proper diagnostics for any of the DTCs listed using the procedures provided in the applicable service manual.
ASE Test Prep: Port Fuel Injected Vehicles And PSI
Does PSI stay in a constant range or vary? This video is sponsored by Carter.
ASE Test Prep: Fuel Pressure (VIDEO)
Let’s see if you have prepared and know the answer to this ASE practice test question. This video is sponsored by Carter.
Seasonal Fuel Blends
The cause of the misfires is the temperature fuel evaporates, otherwise known as the volatility.
LTF and STF Fuel Trim Codes P0170, P0175, P0172, P0174
Understanding what parts should be replaced to get ride of these codes.
Fuel Tank Contamination
A number of things can cause a fuel filter to plug up.
