Weekly Waveform #13 – Fuel pump current testing with low amp clamp.

Let’s check the fuel pump current with a low amp clamp. This can be a good test to verify the current health of the fuel pump or help you identify an intermittent no start or low power concern. The fuel…

Weekly Waveform #13 - Fuel pump current testing with low amp clamp.

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Let’s check the fuel pump current with a low amp clamp. This can be a good test to verify the current health of the fuel pump or help you identify an intermittent no start or low power concern. The fuel pump amperage should have a sinewave pattern with slight variations up and down. Pattern should repeat itself ever rotation of the pump. Counting the humps within your repeating pattern will show you how many commentator bars the fuel pump has. Many pumps will have 8 commentator bars but higher quality pumps may have more.
5-20ms sweep setting on the snapon scope with a 10-20 amp scale
50ms/div-200ms/div on the picoscope with a 10-20 amp scale
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The links below help support the channel at no additional cost to you. Thank you

relay bypass kit with current loop – https://amzn.to/3bOJPSA

60 amp PDI low amp clamp with banana plugs- https://amzn.to/3qznAW0

Cheaper hantek low amp clamp(I have never used this clamp) – https://amzn.to/2JwUC8x

20:1 attenuator – https://amzn.to/2JSicwl

10:1 attenuator for uscope – https://www.aeswave.com/Primary-Ignition-Probe-for-the-uScope-p9557.htmlback

probing set – https://amzn.to/3587E46

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