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Old 08-20-2014, 11:03 PM   #5
motornut
78K & 79C Jimmys
 
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Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
Re: Fuel delivery problems, running sluggish

Quote:
Originally Posted by dkstanley View Post
Welp, i feel like a dumb a** now. Put a fuel pressure gage on and noticed it was erratic between 3 psi and 8 psi. Thought what the hell and bypassed the tank and threw in a 2 gallon gas can straight to the fuel pump. Held a solid 8.5 psi with no needle jumping and held above 6 psi through RPM range. Truck runs way better but its still not at 100%. It no longer wants to die when i give it full throttle but i still feel as though its not getting enough fuel (now that i know that was the problem). My fuel pump has a return line, my rear tank is leaking and i need to replace the lines anyway. Can i get an earlier tank with a feed line only? and install a single in single out fuel pump?
oh ,i'd stay 3 line,helps with vapour lock,my 78 is two line.79 is three.
it helps keep the fuel cooler
I was wondering gummed up transfer stick...
check this out "twin sticking a 203"
http://67-72chevytrucks.com/vboard/s...d.php?t=360447
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John
1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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