VIDEO: Ignition Coil Misfire Diagnostics
Andrew Markel talks ignition coil misfires, and the engine components to check when it happens.
Active Ride Control: Diagnostics And Replacement Options
So, what makes a shock or strut “active?”
Bushing Inspection And Diagnostics
As the bushing ages, it acquires a “set” that is easily disturbed when a vehicle’s steering system is realigned. When this happens, the bushing begins to separate from its metal sleeve and becomes, in essence, a frictional wearing component.
How Noise, Vibration & Harshness Diagnostics Is Changing
The topic of noise, vibration and harshness (NVH) diagnostics came home to me 20 years ago when I began dabbling in collector car repairs. Customers soon began complaining about wind noise and chassis vibrations in ’60s-era cars. Back then, these complaints weren’t repairable because good NVH abatement technology had yet to be developed. Today, that is not the case.
Pulse-Width Fuel Pump Diagnostics
You will see only one fuel line going to the fuel rail on most late-model vehicles. Instead of using an engine vacuum routed to a pressure regulator under the hood, returnless systems use engine data and vary the speed of the electric pump to meet fuel pressure and volume requirements without having to bleed off and return it to the tank when the engine does not need it.
A/C Compressor Replacement: Doing A Visual Inspection & Checking For Leaks And Debris Eases 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 during the summer months.
Alternator Testing Diagnostics Are Getting More Complicated
One test is not enough if you are diagnosing a charging system problem. All too often, if only battery voltage is present with the engine running the alternator is condemned as the source of the problem. If this is the case, it means that the alternator is not charging, but does not reveal why.
Evaporative Emissions Diagnostics: Start With The Basics When You Have Multiple Codes For The Same System
Recently, the shop had a 2002 Lexus SC 430 in for a check engine light with evap codes P0440 – evap malfunction; P0441 – evap incorrect purge flow; and P0446 – evap vent control malfunction.
Catching The Electron Flow: Multimeters And Fuse Box Diagnostics
Gary Goms explains why the multimeter is the first tool he reaches for in his diagnostic tool box when diagnosing electrical system problems.
Rear Main Seal Diagnostics Q&A
Solving why the seal failed in the first place is critical to preventing a labor-intensive comeback. Here are six questions you should be asking yourself before, during and after a rear main seal job.
