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06-20-2018, 08:10 AM
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#1 |
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Registered User
 Join Date: Nov 2015
Location: Gulfport,MS
Posts: 63
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LS swap and charcoal canister
I have a 72 k10 with a 5.3/4L80e combo.
When I purchased the vehicle it had the 350/th350 with a "custom" auxiliary tank rigged up. I had a new 21 gallon tank put in and left the aux tank in but not using it. When it gets hot and the the main tank is anywhere past half the fuel pours out of the auxiliary tank fill hose that's capped off. I know I can just completely disconnect it or plug the large fills out with an expansion type plug but my question is, is anyone else running a vapor canister? My thought is if there is enough pressure to send the fuel to my aux tank and out the full hose and I just cap it, it will find the next weakest point eventually ruining or over pressurizing lines to the motor, etc. Am I wrong? Is it needed or cap it and send it? Posted via Mobile Device |
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06-20-2018, 10:31 AM
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#2 |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,895
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Re: LS swap and charcoal canister
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I would say that the vapor canister is not doing it's job or something is capped off or plugged up on the system. Get a vented gas cap and put it on, see if that cures the problem.... LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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06-20-2018, 11:05 AM
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#3 |
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Registered User
Join Date: Nov 2015
Location: Gulfport,MS
Posts: 63
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Re: LS swap and charcoal canister
I'm pretty sure I don't have a canister but I do have the vented cap
Posted via Mobile Device |
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06-20-2018, 12:27 PM
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#4 |
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Registered User
Join Date: Mar 2004
Location: Lee's Summit, MO (KC)
Posts: 742
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Re: LS swap and charcoal canister
do you have an in-tank fuel pump?
__________________
-Keegan- '72 Jimmy 4x4 - 5.3/4L65E/NP205 swap http://67-72chevytrucks.com/vboard/s...d.php?t=663780 |
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06-20-2018, 03:44 PM
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#5 |
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Registered User
Join Date: Nov 2015
Location: Gulfport,MS
Posts: 63
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Re: LS swap and charcoal canister
Negative.
Posted via Mobile Device |
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06-20-2018, 05:36 PM
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#6 |
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Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: LS swap and charcoal canister
The vapor canister is located beside the battery behind the right headlamp.
It sounds like the tank is getting pressurized. Do you have a fuel return line on your setup? Or is it a single line?
__________________
My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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