Low power, will not accelerate, check engine light with O2 sensor codes. In this video I will show you how to recognize a fuel delivery problem and how to properly test an electric fuel pump.

Video breakdown:
1:51 initial start-up testing of the O2 sensors and Fuel trim
3:25 do fuel trim numbers get better or worse at a higher RPM?
4:39 dead rev hesitation and O2 voltage readings
5:35 why a lean misfire will backfire through the intake
7:37 MAF sensor quick tests
8:32 the test drive
10:10 why the O2 sensor heater codes are not relevent to our low power issue
14:32 underhood visual inspections
15:39 fuel pressure test
17:40 Chevy Truck video reference    • Quick Diagnosis of a '97 Chevy with a...  
19:35 how I handle plugged fuel filters in the field
22:30 Ford Ranger bad fuel pump ground video mention    • Low Fuel Pressure from a bad fuel pum...  
23:34 beginning of fuel pump wiring tests
24:00 uAvtivate tool by AESwave https://www.aeswave.com/cart.php?m=af...
25:11 amperage measurements of the fuel pump (measured at the relay box)
29:00 detailed current waveform measurements (humps vs commutator bars and RPM)
34:20 fuel pressure spec for this vehicle
35:40 video mention of no power to fuel injectors    • No Start, Engine Cranks Okay, Trouble...  
37:00 new pump installed, fuel pump pressure measurements
39:15 a slight fuel pressure drop at WOT that I didn't like
41:40 test drive with my students at Rosedale Technical College (O2 at WOT)
42:33 split tank set up with two sending units and one pump
46:25 new fuel pump current and RPM measurements

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.