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Old 01-23-2017, 02:01 PM   #1
khan1369
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Gas Tank Venting

I am running a 87 K5 Blazer tank with an EP385 in take fuel pump. EGR is deleted. So should the vent line for the tank be open or closed? I would think that if it were closed the tank would end up working harder and harder as the vacuum forms in the tank, leading to the truck running like crap and eventual pump death... What is the right way to do this?
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Old 01-23-2017, 03:06 PM   #2
mongocanfly
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Re: Gas Tank Venting

Vent the tank..no reason not to
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Old 01-24-2017, 09:46 PM   #3
BR3W CITY
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Re: Gas Tank Venting

Either vent the tank, or run a fully vented cap. Some of the vented caps aren't rollover safe, if it matters to ya.
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Old 01-27-2017, 02:26 PM   #4
khan1369
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Re: Gas Tank Venting

Thanks guys. I plan to use a vented cap as soon as I have it fully mounted. I appreciate the response to what is probably a dumb question.
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Old 01-28-2017, 06:00 PM   #5
72MARIO
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Re: Gas Tank Venting

I would reccomemd using the factory charcoal canister as the vent.

My 68 suburban has a vented cap and the Gasoline odour is very strong near the gas when driving stop and.go in town
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Old 01-28-2017, 07:33 PM   #6
BR3W CITY
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Re: Gas Tank Venting

LMAO such a Canadian, actually considering the people around ya lol.
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