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04-13-2013, 09:42 PM
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#1 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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fuel tanks
Hey guys I have a 77 Chevy with a block mounted fuel pump and had to use a tank frol an 87 Chevy with an in tank pump I know with diesels the more fuel the better but am I able to use the intank pump to supply fuel to the manual fuel pump withought issues?
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04-14-2013, 07:28 AM
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#2 |
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Registered User
Join Date: Feb 2007
Location: Memphis MI
Posts: 1,851
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Re: fuel tanks
Not generally a good idea. 87 TBI pump runs 9is PSI, if you have a carbed motor it'll be looking fo 3-5 usually. And stock mechanical pumps generally don't like to be overpressurized from the rear.
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1987 2 ton  1982 250/TH350 beater in progressDad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrappingPlus a mess o' tractors |
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04-14-2013, 03:40 PM
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#3 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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Re: fuel tanks
Ok thanks well I went ahead and used the tank out of the 87 and swaped the pickup and sender from the 77 in its place
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04-14-2013, 10:08 PM
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#4 |
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Registered User
Join Date: Nov 2009
Location: Haines City FL
Posts: 461
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Re: fuel tanks
I am no expert, but i thought you could bypass the mechanical one all together?? Also could a adjustable fuel regulator get you down to 3 psi?
Again i am just shooting in the dark... |
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05-28-2013, 03:20 PM
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#5 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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Re: fuel tanks
Ok I've been running this truck for over a month and it seems to be starving for fuel there is times it will die out of no were and I have to pull a line and crank to get it to get fuel to the carp again my thought is to run a new line from the tank and throw an aftermarket inline fuel pump on with a vented cap to eliminate this issue? It's a wood truck so I'd like to not be dead on The mountain with 2 chord of wood in the back
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05-28-2013, 06:31 PM
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#6 | |
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Registered User
Join Date: Sep 2010
Location: Lake Havasu City Arizona
Posts: 863
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Re: fuel tanks
Quote:
A wood truck is much more likely to die than a non-wood (steel) truck. Just be careful!!
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05-28-2013, 11:54 PM
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#7 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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Re: fuel tanks
What are you talking about the truck isn't wood its a wood truck you know you drive it up into the mountain and bring wood home
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04 F350 charcoal and chrome, 500hp 6.0l powerstroke 04 GMC Yukon 5.3l with some goodies 1977 Chevy k30 lifted on 37s with sbc 400 and 4 speed 1959 GMC 455v with 10.00-20 tires and 16' dump bed |
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05-29-2013, 01:17 AM
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#8 |
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Registered User
Join Date: Sep 2012
Location: TX
Posts: 1,014
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Re: fuel tanks
ROFL you guys are funny
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05-29-2013, 01:30 AM
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#9 | |
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Registered User
Join Date: Apr 2013
Location: Nor-Cal
Posts: 632
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Re: fuel tanks
Quote:
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WHO_DCTC - Wifes 05 Z-71 Build - Now defunct as she decided she wants an Escalade too Cream Puff - LS'd Square - Slow going on the back burner Tripple Threat - 3 Wrecks for the price of one build thread Project Delongdium - Step-Sons Plastic Clad 2003 Avalanche - DONE and Delivered. |
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05-29-2013, 07:12 AM
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#10 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: fuel tanks
any chance the sender isn't long enough?
does it have a return line? wraprail may have a point ,which cap did you use 87 or 77? what kind of carb,fuel filter? my stock carb on my 79 just started to suck the backflow valve out of the fram filter would leave me dry http://67-72chevytrucks.com/vboard/s...d.php?t=579621
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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05-29-2013, 03:41 PM
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#11 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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Re: fuel tanks
I'm running the 77 non vented cap no return line to the tank and for fuel filter just a clear 3/8 fuel filter as far as carb stock 77 quadrajet
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04 F350 charcoal and chrome, 500hp 6.0l powerstroke 04 GMC Yukon 5.3l with some goodies 1977 Chevy k30 lifted on 37s with sbc 400 and 4 speed 1959 GMC 455v with 10.00-20 tires and 16' dump bed |
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05-29-2013, 04:41 PM
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#12 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: fuel tanks
if you have blocked off pollution hoses etc,a vented cap might be better now
could try loosening up the cap......
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 05-29-2013 at 04:46 PM. |
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05-29-2013, 05:58 PM
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#13 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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Re: fuel tanks
Ya I'm gunna just throw a vented cap on it anyway cheep and a new filter
__________________
04 F350 charcoal and chrome, 500hp 6.0l powerstroke 04 GMC Yukon 5.3l with some goodies 1977 Chevy k30 lifted on 37s with sbc 400 and 4 speed 1959 GMC 455v with 10.00-20 tires and 16' dump bed |
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05-29-2013, 07:02 PM
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#14 |
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Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,620
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Re: fuel tanks
It needs some kind of vent. My 75 no-emission just has one line from each tank to fuel pump and a small plastic vent thing on the other sender connection. When I replaced the 30+ year old gas line on one of the tanks, the plastic vent crumbled. Tried just plugging it. Got your symptoms on that tank. Couldn't find a vented cap at the local parts stores. Put a small hole in the existing cap. That solved the vent issues but since those tanks don't have the little flap door the unleaded tanks have, kept getting gas seeping out of the vent hole. Went back to an unvented cap and just put a plastic L fitting on the vent hose to replace plastic vent. Fixed the problem and have had any issues with water.
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05-30-2013, 01:34 AM
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#15 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: fuel tanks
I believe that axle vents are pretty much the same part...
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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05-30-2013, 12:06 PM
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#16 |
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Registered User
Join Date: Apr 2013
Location: spirit lake id
Posts: 36
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Re: fuel tanks
I had vented caps on my 87 so maybe ill try one of those I don't even know of the top of The sender has a port for a vent
__________________
04 F350 charcoal and chrome, 500hp 6.0l powerstroke 04 GMC Yukon 5.3l with some goodies 1977 Chevy k30 lifted on 37s with sbc 400 and 4 speed 1959 GMC 455v with 10.00-20 tires and 16' dump bed |
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