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> Cool Tools > MV5545 Fuel System Test Kit


MV5545 Fuel System Test Kit

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With the MV5545 Fuel System Test Kit, diagnose and pinpoint common fuel system failures including failing fuel pump, faulty pressure regulator, blocked filter(s), pinched fuel line, contaminated fuel, and fuel tank vortex. 


  • Measures fuel system pressure and flow to accurately pinpoint fuel system failures.
  • Saves hours of troubleshooting by diagnosing a bad fuel pump and other related problems in seconds.
  • Patented system simulates extreme driving conditions in the shop to provide the most accurate diagnosis.
  • Capable of testing both return and returnless fuel systems including electronic control.
  • Provides clear visualization of fuel to detect impurities and air bubbles.



  • 3.5" (90mm) high pressure gauge with rubber boot, push-button relief valve, and hanging hook.
  • Flowmeter w/ borosilicate glass flowtube, patented flow-control valve, and 1 gal./min max flow capability.
  • Two 4-foot (1.2m) Flowmeter hoses
  • Clear bypass and pressure relief hoses
  • Two Fuel hose clamps
  • Adapters for connecting to U.S., European, and Asian manufactured cars & light trucks
  • Flowmeter faceplates with gallons/minute and liters/minute units of measure
  • Custom molded case
  • Operator’s manual



How to diagnose and analyze a fuel delivery system with the Mityvac 5545



1996 GMC Suburban Fuel pump analysis and repair

Performing a state of health check on this 330K mile ‘96 GMC Suburban 7.4L revealed fuel pressure within specification. However, the system suffers from low rest pressure. 

Jump into the service bay with Scott Brown at Connie & Dick’s Auto Service Center in Claremont CA, as he performs a few quick checks in order to evaluate the vehicle’s fuel delivery system against its original engineering design.

Extra points to notice in the presentation:
• Workspace and workstation setup
• Tool selection and application
• Component location look up
• Electrical circuit health
• Pump speed

Tools used:
- AES uActivate
- PicoScope 
- Coda (discontinued), best alternative, the MityVac 5545.





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