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02-28-2011, 10:40 PM
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#1 |
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Registered User
 
Join Date: Mar 2009
Location: Tucson AZ
Posts: 187
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fuel problem?
So I need some help. Stats 350 with edelbrock 650 th400.. ok so my truck has a stumbling issue. When I brake the truck stumbles and dies. Also when im going about 50 it only stumbles. So I did a process of elimination. Changed fuel pump and filters...still happening. Rebuilt carb and checked for vacuum leak. The problem just started. Is there something in my gas tank causing this problem. Also checked fuel lines and all is well
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02-28-2011, 11:08 PM
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#2 | |
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I built it
Join Date: Sep 2008
Location: Bakersfield ca
Posts: 744
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Re: fuel problem?
floats set properly? in the back of the edelbrock book it has a troubleshooting page with a list of possible problems/solutions
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'72 k10 lwb 454, th400, 205, d44ft, 12b rear, 4in skyjacker, 35x12.5-15 superswampers, 4.56, blazer tank. painless wiring harness '98 dodge 3500 12v 5sp 4x4. the truck that actually runs Quote:
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02-28-2011, 11:13 PM
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#3 |
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Registered User
Join Date: Apr 2010
Location: Boise, ID
Posts: 1,280
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Re: fuel problem?
Do you have HEI? My plug wires were too close and arcing at times causing issues.
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02-28-2011, 11:25 PM
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#4 |
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Registered User
Join Date: Mar 2009
Location: Tucson AZ
Posts: 187
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Re: fuel problem?
I measured both floats and they are good. Ill def check my wires. Seems to only happen when i Come to a stop or slowing down for a turn. I already spent to much money and am at my wits end
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02-28-2011, 11:25 PM
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#5 | |
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Registered User
Join Date: Oct 2007
Location: Valley Springs, Ca
Posts: 857
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Re: fuel problem?
Quote:
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 My Build Threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=442487 My Picture Gallery http://67-72chevytrucks.com/gallery/...0&ppuser=36004 |
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03-01-2011, 10:46 AM
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#6 |
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Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: fuel problem?
There could be a problem with the fuel pickup in your gas tank. There is a sock on the fuel pickup tube that might be clogging up. It is easy to remove the sending unit/fuel pickup assembly to check.
People have found all kinds of odd stuff inside the gas tank. Have you checked the two rubber sections of the fuel line? One is under the cab and the other is on the suction side of the fuel pump.
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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03-01-2011, 11:12 AM
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#7 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: fuel problem?
Old time tuners will tell you that 90% of carb problems are igniton problems. Sounds like your advance is not working. Pull the cap and see if both the mech and vac advance are free. Also check the resistance in your plug wires.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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03-01-2011, 11:27 AM
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#8 |
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Registered User
Join Date: Sep 2003
Location: maine
Posts: 191
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Re: fuel problem?
Do you have power brakes?
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03-01-2011, 06:58 PM
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#9 |
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Registered User
Join Date: Mar 2009
Location: Tucson AZ
Posts: 187
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Re: fuel problem?
So I changed the brake booster and a world of difference. when I would slam on my brakes it would not lock up the tires. Now it locks up and with the truck full forward tilt it stumbles for a second but does not die. I have not taken it on a long drive but all seems well. I just didnt think the booster being bad would cause it to stumble. Ill do some updates as i drive it this week
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