Ford V8 Discussion Discussion relating to getting the most out of your Ford-based V8 Miata's engine

Fuel line question

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Old 09-07-2018, 07:14 PM
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Default Fuel line question

just wondering what I do with the vent line from the fuel tank?
do I connect to something?
Old 09-08-2018, 06:23 AM
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I had already done the charcoal can delete on my car, so my vent line is just loose under the car.
Old 09-08-2018, 07:15 AM
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Originally Posted by jrmotorsports55
I had already done the charcoal can delete on my car, so my vent line is just loose under the car.
Ok thank you. It’s funny how many little things you come across that make you scratch your head and say not sure what to do.
Old 09-09-2018, 05:29 AM
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Yeah, lots of little things on this swap. I don't have any emissions testing concerns, so pretty free on what I can do/delete.
Old 09-09-2018, 10:52 AM
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Alternatively you can hook up the cannister. I used the Miata cannister with the Mustang relay.
I really think you’ll want to do that to keep your garage from stinking of gas.
You probably already know, but there will be 3 lines from the tank. fuel send, fuel return, and evap.
Old 09-09-2018, 11:02 AM
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I will add that I don’t notice any fuel smell with mine, but either way it really does not matter. My charcoal setup was already gone so I just stuck with that (also adds a little open space on the apron.
Old 07-30-2019, 07:13 PM
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Agree with Brad. It is a good idea to hookup the vent to a Charcoal canister and purge the fumes back into the engine. The V8 setup tends to pressurise the fuel tank slightly more than the 4 cyl setup thereby making more fuelly vapor. Best to capture the vapor, as the car and the garage can smell of fumes if closed up after a long drive and left overnight.

The Miata canister is slightly on the small side to deal with the V8 setup. I am using a GMC Yukon 1998-1999 5.7L canister as its larger with more capacity to sink fumes.

cheers
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