2001 GMC 3500 8.1L engine with no fuel pressure. In this video I am showing how to test the fuel pump electrical circuit using a test light and scan tool.
Engine Performance Diagnostics chapter 16
Symptoms
- no start
- no fuel pressure
Fix
- replace faulty fuel pump
Tests shown
- how to measure fuel pressure
- how to test the fuel pump relay
- how to test for proper power and ground to a fuel pump
- how to test the transfer pump
- how to test for a proper ground on your test light
- how to command a fuel pump relay to turn on with a scan tool
- how to test the computers control of the fuel pump relay
- how to determine fuel pump wiring without a diagram
Tools used
- scan tool - Autel MS905 MaxiSys Mini Diagnostic System
www.jbtoolsales.com/autel-ms9...
- incandescent test light www.jbtoolsales.com/otc-3633-...
- back-probing tools - AES' Electronics Accupuncture Probes www.aeswave.com/cart.php?m=aff...
- S.U.R. & R FPT22 Deluxe Fuel Injection Pressure Tester Kit
www.jbtoolsales.com/s-u-r-r-f...
Playlist
- (Chapters 14, 15,16) Fuel Delivery and Fuel Pressure Testing
• (Chapters 14, 15,16) F...
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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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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.