In this video I will walk you through some basic tests on verifying spark, injector pulse and fuel pressure. All you need is a digital multimeter and a small pocket screwdriver. I will be using the Power Probe IV but this is not a necessary tool to handle this problem. I chose this particular tool due to the long reach of the cables and the direct connections to the battery. This allowed me to not worry about finding a good ground underneath the rusty vehicle when i came time to verifying the fuel pump power and ground.

Engine Performance Diagnostics chapter 16

symptoms

  • cranks but does not start

fix 50

  • replace faulty fuel pump

test shown

  • how to test for spark
  • how to test for injector pulse with a Power Probe IV
  • how to test for fuel pressure without a gauge
  • how to test fuel pump power and ground

Tools used

  • Power Probe IV (a DMM may be used as a substitute)
  • pocket screwdriver

end faq

Playlist

(Chapters 14, 15,16) Fuel Delivery and Fuel Pressure Testing

Related videos:

How to test fuel pressure, injector pulse and spark with basic tools - Honda:

How to test an electric fuel pump (no fuel psi testing) - Ford:

Fuel pump electrical circuit diagnosis (no fuel pressure testing) - GM:

No Start No Fuel Pressure Troubleshooting - GM 2.2 Ecotec:

How to test an electric fuel pump - using a test light:

Low Fuel Pressure from a bad fuel pump ground (Ford Ranger):

end faq


For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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