Is my fuel pump going bad? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cam.man67 · 06-01-2011, 04:31 PM

So I was hauling a load of hay (about 9000lbs) behind my '87 GMC 1500 yesterday from one farm to another and the first of four hills on the way, the truck practically died. It just sounded nasty, sputtering and backfiring...almost like I had no fuel going to it. I crawl to the top of the hill, the truck comes back to life. This happens the whole way up to the farm, at which point I retired the truck for the evening and started with my dad's '08. Does this seem like symptoms of a bad fuel pump? I just replaced the left side gas tank about 3 months ago, so I don't think the fuel line is plugged or anything. The truck drives fine without any load. I've got a new fuel filter, as well as new plugs and wires, all done within the last 2 months. Any advice?
Thanks.

Chevy350V8 · 06-01-2011, 04:41 PM

could be, mine bogged and didnt respond to the gas pedal, i would just change it if i where u, better now then when ur hauling something ya know

chevymotocross · 06-01-2011, 10:05 PM

Hard to say. Check fuel pressure to verify the pump is not weak. Usually, atleast for me, these pumps either work.... or they just go, immediately, and when you are far from home.

**old Rusty C10** · 06-01-2011, 10:20 PM

i tend to agree with chevymotocross in my experience they work or they dont. that is not to say you dont have a fuel issue tho.. check the pressure at the injector as well as the pump pressure

TheWhiteElephant · 06-01-2011, 10:39 PM

Yeah, I agree on the 2 above comments. I've only had them go bad suddenly, and you know right away because the engine will just starve. I've always used glass filters near the carb so that you can see the fuel going into the carb.

06-01-2011, 04:31 PM	#1
cam.man67 Registered User Join Date: Jun 2010 Location: Jefferson, MD Posts: 2,397	Is my fuel pump going bad? So I was hauling a load of hay (about 9000lbs) behind my '87 GMC 1500 yesterday from one farm to another and the first of four hills on the way, the truck practically died. It just sounded nasty, sputtering and backfiring...almost like I had no fuel going to it. I crawl to the top of the hill, the truck comes back to life. This happens the whole way up to the farm, at which point I retired the truck for the evening and started with my dad's '08. Does this seem like symptoms of a bad fuel pump? I just replaced the left side gas tank about 3 months ago, so I don't think the fuel line is plugged or anything. The truck drives fine without any load. I've got a new fuel filter, as well as new plugs and wires, all done within the last 2 months. Any advice? Thanks. __________________ '68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73

06-01-2011, 04:41 PM	#2
Chevy350V8 Semper Fi!!! Join Date: Aug 2010 Location: Sherrills Ford, North Carolina Posts: 971	Re: Is my fuel pump going bad? could be, mine bogged and didnt respond to the gas pedal, i would just change it if i where u, better now then when ur hauling something ya know __________________ Brandon... "IT ONLY TAKES EVERYTHING YOU GOT!!" Semper Fi

06-01-2011, 10:05 PM	#3
chevymotocross Registered User Join Date: May 2007 Location: East Haven, CT Posts: 882	Re: Is my fuel pump going bad? Hard to say. Check fuel pressure to verify the pump is not weak. Usually, atleast for me, these pumps either work.... or they just go, immediately, and when you are far from home. __________________ 87 Chevy 2wd SWB: 305/700r4 Dual Exhaust, K&N Filter, Injector Pod Spacer, TBI Spacer, Belltech Front Sway Bar, Corvette Servo, Western Chassis 4/6 and c-notch

06-01-2011, 10:20 PM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,277	Re: Is my fuel pump going bad? i tend to agree with chevymotocross in my experience they work or they dont. that is not to say you dont have a fuel issue tho.. check the pressure at the injector as well as the pump pressure __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! Last edited by old Rusty C10; 06-01-2011 at 10:21 PM.

06-01-2011, 10:39 PM	#5
TheWhiteElephant God is good! Join Date: Sep 2010 Location: Texas Posts: 689	Re: Is my fuel pump going bad? Yeah, I agree on the 2 above comments. I've only had them go bad suddenly, and you know right away because the engine will just starve. I've always used glass filters near the carb so that you can see the fuel going into the carb. __________________ Mando *"It takes a smart man to know when he's stupid." -- Barney Rubble* My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=430367



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