How to troubleshoot a no fuel pressure problem on any car. Is it the fuel pump, relay or wiring? Computer problem? Cam or Crank sensor problem? These questions and many others I will answer in this video.
The car being tested is a 2001 Ford Explorer with a P0231 Fuel Pump Secondary Circuit Low trouble code.

Engine Performance Diagnostics chapter 15

Symptoms
- no start

Fix
- replace faulty fuel pump relay

Tests shown
- how to test fuel pressure
- how to use the check engine light during cranking as a guide
- how to use the tachometer during cranking as a guide
- how to test a fuel pump relay
- how to determine load and control sides of a relay
- how to determine if the computer is controlling the FP relay

Tools used
- (inexpensive alternative to the scan tool I used) AutoLink AL519 CAN/OBDII Scan Tool w/ live data
[ Ссылка ]
- OTC 3633 Mini Circuit Tester
[ Ссылка ]
- S.U.R. & R FPT22 Deluxe Fuel Injection Pressure Tester Kit
[ Ссылка ]

Related videos
- How to test fuel pressure, injector pulse and spark with basic tools - Honda [ Ссылка ]
- Fuel pump electrical circuit diagnosis (no fuel pressure testing) GM [ Ссылка ]
- How to test an electric fuel pump (no fuel psi testing) Ford
[ Ссылка ]
- Fuel Pump Electrical Circuits Description and Operation
[ Ссылка ]

Playlist
- (Chapters 14, 15,16) Fuel Delivery and Fuel Pressure Testing
[ Ссылка ]

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.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium [ Ссылка ] There is a 14 day free trial.
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.

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