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#1 |
Registered User
Join Date: May 2013
Location: Manhattan Beach CA
Posts: 129
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What are the three fuel lines for the 5.3L
For my 5.3L swap i noticed i have three fuel lines connected all around the engine and i dont know which is which. Pic are helpful!
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#2 |
Registered User
![]() Join Date: Jul 2013
Location: Forestburg, Texas
Posts: 659
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Re: What are the three fuel lines for the 5.3L
The big one is the fuel supply goes to the fuel rail.
The next one is the fuel return goes to the FPR on the fuel rail. The other is the purge vacuum line going to the purge valve on top front of the upper plenum. Sorry, no pics from me.
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Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks |
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#3 |
Registered User
Join Date: May 2013
Location: Manhattan Beach CA
Posts: 129
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Re: What are the three fuel lines for the 5.3L
where do i hook up the vacuum line too? Thanks for the response!
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#4 |
Registered User
![]() Join Date: Jul 2013
Location: Forestburg, Texas
Posts: 659
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Re: What are the three fuel lines for the 5.3L
It goes to the fuel tank purge charcoal canister that is originally mounted in front of the tank. If you are not using the canister then it can be eliminated. However the purge sequence must be edited in the ECM or you will get codes
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Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks |
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#5 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: What are the three fuel lines for the 5.3L
Put a vacuum plug over it and delete on your PCM when you have it tuned, as stated above.
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#6 |
Registered User
Join Date: May 2013
Location: Manhattan Beach CA
Posts: 129
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Re: What are the three fuel lines for the 5.3L
perfect thank you guys! im inching closer to getting this thing running!
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A place for everything, everything in its place. Check out my build thread! http://67-72chevytrucks.com/vboard/s...43#post6129043 |
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#7 |
Registered User
Join Date: Jul 2010
Location: Willingboro, NJ
Posts: 489
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Re: What are the three fuel lines for the 5.3L
I used that port on another project to provide vacume for power brakes. The motor didn't have a vacume port for the booster so it made sense to re-purpose the existing port.
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#8 |
Registered User
![]() Join Date: Jul 2013
Location: Forestburg, Texas
Posts: 659
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Re: What are the three fuel lines for the 5.3L
Truthfully, I'm thinking about using the Evap canister. I have it from the '99 parts truck I had. I'm still unclear on what I want to do with the fuel tank/supply system.
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Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks |
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#9 |
Registered User
Join Date: May 2013
Location: Manhattan Beach CA
Posts: 129
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Re: What are the three fuel lines for the 5.3L
if i cap it off will it effect the performance of the truck?
__________________
A place for everything, everything in its place. Check out my build thread! http://67-72chevytrucks.com/vboard/s...43#post6129043 |
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