New fuel pump, no sound - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cfan10 · 04-22-2019, 07:16 PM

OK, I installed a new fuel pump yesterday cleaned all the gas lines, new fuel filter. Tank is in good condition but the old fuel pump dropped rust particles from the clamps. I'll maybe one day drop the tank and clean it, probably not since I cut a access to the fuel pump.
The new fuel pump doesn't prime and truck wouldn't start, checked battery with jumper it shows red, damn Walmart batteries! I thought even if the battery is really low wouldn't cause the fuel pump not to prime, the truck almost started a few times but I heard nothing.

Info:
91 suburban 5.7 tbi/700r4

As always many thanks in advance for the advice, it is greatly appreciated!

https://youtu.be/nicTjbM7vOE

**undertaker72** · 04-22-2019, 07:18 PM

get full voltage and check for a good clean ground

sweetk30 · 04-22-2019, 08:23 PM

check for good ground from sender end to frame .

check for power to pump sender plug .

single red wire on relay at firewall for fuel pump is for testing relay . send 12v pos down it and check for pump run and voltage . if works then the relay is possible d.o.a or other problems .

04-22-2019, 07:16 PM	#1
cfan10 Registered User Join Date: May 2011 Location: Texas Posts: 984	New fuel pump, no sound OK, I installed a new fuel pump yesterday cleaned all the gas lines, new fuel filter. Tank is in good condition but the old fuel pump dropped rust particles from the clamps. I'll maybe one day drop the tank and clean it, probably not since I cut a access to the fuel pump. The new fuel pump doesn't prime and truck wouldn't start, checked battery with jumper it shows red, damn Walmart batteries! I thought even if the battery is really low wouldn't cause the fuel pump not to prime, the truck almost started a few times but I heard nothing. Info: 91 suburban 5.7 tbi/700r4 As always many thanks in advance for the advice, it is greatly appreciated! https://youtu.be/nicTjbM7vOE __________________ Rest In Peace:Mikhail {Mickey Rooney} Alpha 2/5/13 Omega 7/22/14 10:28AM I love you tremendously and outragiously Superpuppi Thai Ridgeback...The most intelligent dog known to me. Don't mess with my truck, my momma or my money...not necessarily in that order. © Stand for something or fall for anything. [LIST][*]'98 Bourbon St. Brawl ©2010

04-22-2019, 07:18 PM	#2
undertaker72 Senior Member Join Date: Dec 2013 Location: nephi , utah Posts: 2,308	Re: New fuel pump, no sound get full voltage and check for a good clean ground __________________ I aint nobody DORK 1972 Cheyenne super k10 swb 350 4speed posi hooks 1934 ford 3 window blown 355 1969 Camaro hugger orange hounds tooth

04-22-2019, 08:23 PM	#3
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: New fuel pump, no sound check for good ground from sender end to frame . check for power to pump sender plug . single red wire on relay at firewall for fuel pump is for testing relay . send 12v pos down it and check for pump run and voltage . if works then the relay is possible d.o.a or other problems . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

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