Andrew Markel shows how unfiltered air can pass through an air filter to the mass air flow sensor, creating lean codes. Sponsored by Auto Value and Bumper To Bumper.
Video courtesy Underhood Service.
Here are six tips to use when diagnosing a vehicle with a dead battery.Â
Remember the good old days of battery and alternator testing? With just a multimeter you could test if the alternator was charging and if the battery had a decent state of charge. On most late-model vehicles, the battery and alternator are managed together to minimize the load on the engine to boost fuel economy.
This function of the power management system uses several modules to decide when the engine needs to stop and start.
Like any automatic transmission, the condition and level of fluid in a CVT unit will determine the performance.
Over time, the oil filter can collect enough contaminants to become restricted.
The key to servicing these systems is proper information and understanding precisely how these systems operate.
Every driver has a different threshold for a pull.
If the clutch gets too hot from excessive slippage or loading, the linings may burn, damaging the clutch.
Accuracy is important for sophisticated ADAS systems.
AWD is always engaged and with the ABS brake modulator, can perform like systems with limited-slip differentials.
