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https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl General Public Area >> PicoScope >> fuel pump https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl?num=1629291539 Message started by Ricky M on Aug 18^th, 2021 at 4:58am

Title: fuel pump
Post by Ricky M on Aug 18^th, 2021 at 4:58am

captured a fuel pump waveform and not sure if this is something that is good. pickup has a random no start.

https://yabb.autonerdz.com/cgi/yabb2//YaBB.pl?action=downloadfile;file=Chevrolet_Silverado_1500_Petrol_20210818-0001.psdata (788 KB | )

Title: Re: fuel pump
Post by HarleyMike on Aug 18^th, 2021 at 7:34am

Clamp up side down?

Try to get a capture from key on, to crank, to run. There are clues in the turn on amps as well.

Title: Re: fuel pump
Post by Ricky M on Aug 18^th, 2021 at 9:16am

turn on amps peaked over 20

Title: Re: fuel pump
Post by rayray on Aug 18^th, 2021 at 12:15pm

To get a full capture, set the scope to 500ms/div

Title: Re: fuel pump
Post by Logic on Aug 19^th, 2021 at 1:20am

Ricky M wrote on Aug 18^th, 2021 at 4:58am:

captured a fuel pump waveform and not sure if this is something that is good. pickup has a random no start.

Turn you amp clamp around and all is good.