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Did you fix it? [counter fuel trim numbers]
Fuel Trim Diagnostics [an SD Premium class] #fueltrim
Restricted Exhaust/Plugged Cat [Identification and Testing Procedures]
A Circuit Can Measure Good With An Ohmmeter And Still be Bad!
Aftermarket Crank Sensor Causes Major Hesitations/Misfiring [Jeep]
Topdon TopScan Pro #bluetoothscanner #carscanner #automobile
Ignition Coil Control Testing with a Test Light [Good Control vs No Control]
No Spark? Learn This Test!
Who pays for this? [Engine dies while servicing A/C system]
A/C Low on Charge or Stuck Closed Expansion Valve?
RPM Drop Test [which cylinder is misfiring?]
2001 8.3 Cummins ISC [low power, surging, stalling, no start]
Is the MAP code the cause or the effect??
Understanding circuit design is key!
Starting Circuit Tests [test lights are obsolete...NOT!]
Aftermarket vs Factory Crank Sensor [click link for full video]
MAF Sensor with a Bad Ground #dontbeapartschanger
Is a Relative Compression  or Cranking Sound Test Foolproof?
No Crank, Bad Starter? [bailing out my mom]
Bad Engine Computer or Open Control Wire? [Ground Side Switched Circuit]
How To Pinpoint a Vacuum Leak [the safe way]
Trouble Codes are Not Parts Lists!
Using the O2 Sensor at Wide Open Throttle to Determine Fuel Delivery [known bad]
Using the O2 Sensor at Wide  Open Throttle to Determine Fuel Delivery [known good]
2021 Toyota Tacoma [Auction Purchase] No Start, No COM, Low Reference Voltage
Testing Alcohol% in Fuel [severe rich conditions]
Ignition Coil Firing Continuously with Key On
Good and Bad Fuel Injector Voltage Waveforms [misfire with engine warm]
Engine Misfire/Runs Good Cold/Failing Fuel Injector Winding
Bias Voltage on a Power Side Switched Circuit
Using the 5V Reference Circuit to Troubleshoot a No Start No COM w/ PCM
What does this sound (when cranking) indicate??
Bad Grounds Can Do Crazy Things! (Low Fuel PSI)
Weak Spark/RPM Drop Test [waste spark design] #misfire #ignitioncoil #rpmdrop
Update on my mom's battle with cancer
Using the O2 Sensor at WOT to Identify a Fuel Psi Problem
When the Customer is Watching
No Injector Pulse Testing #misfire #injector
Testing for Fuel Injector Control [Injector Pulse Test] #fuelinjector #nostart #misfire
Testing for Opens and Shorts [Signal Circuit Integrity]
Shorted 5v Reference Circuit [faulty MAP Sensor]
No Start - PCM No Com - No Spark or Injector Pulse  [5v Reference Test]
Weak Spark Test [C.O.P. Ignition Coil]
Waste Spark Coil with One Open Plug Wire
No Spark From One Side of a Waste Spark Ignition Coil #misfire #nospark
Cranking Compression Sound Test #misfire #techtraining #automotivediagnostics
A Perfect Example of a Loaded Circuit Voltage Drop Test! #starter #nostart #resistance #voltagedrop
It's not just a text book, it's a field manual!