Not Sure if the Air Filter Needs to Be Changed? Check the Fuel Trim
One thing EFI can’t control is the amount of air that flows into the engine. That is predicated by the engine design, whether it is turbocharged or supercharged, and how well the air flows from outside the engine through the air filter and past the MAF sensor and into the combustion chamber.
Alternator Ripple Testing: The Ghost in the Machine
Before computers and networks in vehicles, an alternator that was producing AC voltage or ripple through the electrical system would cause flickering lights and maybe an ignition problem. Today, excessive ripple voltage can cause communication issues with networks and communication DTCs in multiple modules.
A/C Compressor Replacement: Visual Inspections & Checks Ease Diagnostics
Driving around in the hot summer heat can take a toll on the A/C system, so, chances are, you’ll be doing a lot of HVAC repairs from now until the end of September.
Checking for Runout After Installing Any Rotor is Your Defense Against Comebacks
Many techs believe that installing new pads and rotors is the solution to brake noise and vibration and that installing new parts makes everything perfectly aligned so that no other steps are needed to bring the system back to service. Well, this is true and false.
