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08-17-2005, 07:10 PM
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#1 |
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Registered User
 
Join Date: Jan 2002
Location: WATAUGA,TX
Posts: 660
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Running out of gas
My sons 71 has started to act like its running out of gas. It seems to run good at idle or low speed. At about 50-60 mph it seems to act like its out of gas. Thought it might be picking up stuff from the bottom of the tank so I pulled the sending unit and there was no sock on the end of the pickup. I installed a new one and the problem didnt go away. The gas tank has probably never been out of the truck so I am not sure how much garbage is at the bottom. It is a 350 with a turbo 350. Stock rebuilt quadrajet and a fairly new fuel pump. Also a clean stock fuel filter in the carb. Looking for suggestions on thing to check.
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72 2wd 307/AT/AC/TILT WHEEL 78 JIMMY HIGH SIERRA |
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08-17-2005, 07:55 PM
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#2 |
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Registered User
Join Date: Jun 2005
Location: Sacramento CA
Posts: 1,255
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Change the fuel filter anyway.
Do you have more than one fuel filter? Chang'em both. Remove the fuel line before the fuel pump and blow air back to the tank. Take the top off the carb and see what lives in there. Collapsing fuel line? Fuel line cut on the inside and closes with flow? Just shootin' in the dark!
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Got bored, sold everthing. Got bored, looking for a 1960-66 C-10. Want to build my last truck. |
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08-17-2005, 07:58 PM
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#3 |
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The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,475
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I Did everything you said above, the sock was missing, changed the filter,
changed the fuel pump, changed some of the fuel lines, it ended up being the tube you just attached the new sock to, it was partially clogged. 
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Big Piggy: "Goliath" 07 Kodiak C4500 Lil Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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08-17-2005, 10:05 PM
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#4 |
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Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Also check for a vacuum leak at the carb, loose bolts probably, mine did that...
Smitty
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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08-17-2005, 10:15 PM
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#5 |
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Registered User
Join Date: Aug 2005
Location: mount airy n.c.
Posts: 243
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i did everything to mine to it was a new faulty fuel pump
Last edited by chops333; 08-17-2005 at 10:15 PM. |
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