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Electrical problem

 
Old 03-28-2019, 09:04 PM
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Default Electrical problem

When I turn my fans off and on, I hear it in my fuel pump. Can anybody tell what that is??
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Old 03-29-2019, 06:36 PM
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Power surge ?

Voltage drop due to undersized electrical system ?

Do your headlights also dim when you do this ?

EDIT:
You could add a capacitor like they do in high draw stereo system to help with the surge ?

I have twin fans which used to come on at same time with the same results as you, and now running a Davies Craig controller that turn on one at a time....much less draw at one time.

Last edited by Doug G; 03-30-2019 at 06:10 AM. Reason: add-on
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Old 03-30-2019, 01:08 PM
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I think I found it Doug, I drilled and tap my water pump and the temperature sensor wasnít getting a good ground coming from the relay. So i added a second ground to the frame. Lights do not dim anymore.Thankyou for the feed back.
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Old 03-30-2019, 01:14 PM
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I still have issues. Working everything out one at at time. I drove it yesterday. Have good throttle response, but when Iím cruising about 35 or 40. I get a exhaust backfire and my AFR reading like 15.7. I know thatís lean. So Iíll change the jets and see what happen.

Last edited by chines72; 03-30-2019 at 03:02 PM.
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Old 03-30-2019, 06:15 PM
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15.7 at cruise isn't terrible.
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Old 03-31-2019, 06:05 PM
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Could be an exhaust leak. Torque the header bolts.

My fuel pump changes pitch when the blinkers blink.
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