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Re: [GMCnet] Air Teck E8094 fuel pump. Check valve or not. [message #322430 is a reply to message #322428]

Sun, 20 August 2017 17:52

emerystora

Messages: 4442
Registered: January 2004

Karma:

Senior Member

If you are eliminating your selector valve you definitely cannot have back flow through a pump.
When I did my in-tank fuel pumps I used two Airtex E3902 pumps.
I checked to see if they had a built in check valve by hooking up an air compressor to pump air backwards though the pump. I got up to 70 psi with no air going trough the pump. I stopped and didn’t try a higher pressure as there was no need to.
They have been in for several years now without using an external check valve and all works fine.

Why don’t you try air pressure back through the pumps you propose using. You can quickly find out if they have a built in check valve. If not, then you’ll have to use external check valves.

Emery Stora

> On Aug 20, 2017, at 4:42 PM, Bob Dunahugh wrote:
>
> Do I need a check valve with my 2 pump EFI set up? I've heard yes/no. Bob Dunahugh
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[Message index]

		[GMCnet] Air Teck E8094 fuel pump. Check valve or not. By: BobDunahugh on Sun, 20 August 2017 17:42
		Re: [GMCnet] Air Teck E8094 fuel pump. Check valve or not. By: emerystora on Sun, 20 August 2017 17:52
		Re: [GMCnet] Air Teck E8094 fuel pump. Check valve or not. By: jimk on Sun, 20 August 2017 18:00
		Re: [GMCnet] Air Teck E8094 fuel pump. Check valve or not. By: BobDunahugh on Sun, 20 August 2017 21:45
		Re: [GMCnet] Air Teck E8094 fuel pump. Check valve or not. By: jhbridges on Mon, 21 August 2017 07:46

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