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73-87 Chevy _ GMC Trucks => Fuel Systems and Drivability => Topic started by: Swampyankee74 on August 05, 2022, 06:11:06 pm

Title: V20 fuel pump.
Post by: Swampyankee74 on August 05, 2022, 06:11:06 pm

My fuel pump has been working on and off on my 87 v20. Changed the relay. Have a good ground. So I put 2 volts to the pump and it does not work. Dead fuel pump.  What I'm wondering is I put a meter to the pump pigtail and get 9 volts. Do I have a power issue that is cooking the pump?

Title: Re: V20 fuel pump.
Post by: Swampyankee74 on August 05, 2022, 06:12:17 pm

*12 volts to the pump

Title: Re: V20 fuel pump.
Post by: VileZambonie on August 05, 2022, 07:15:54 pm

12-9=3 meaning you have a voltage drop which is resistance, or you are just getting poor readings.