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Old 02-27-2018, 04:02 PM   #1
4carbcorvair
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Fuel pump question

My dad passed in 2012, my mom gave me his 97 GMC 5.7 auto. It showed up DOA, needed a fuel pump. Installed an Airtex pump, lasted almost 4 years. less than 1.5 years ago I installed a Delphi, it started acting up a few weeks ago with either hard or no start, low pressure. So I picked up an E8248 inline pump. Well, the thing is loud as heck, whines. Just for poops and giggles I wired the stock (weak) pump in so the stock pump is almost acting like a lift pump. It did quiet the inline down a little, still louder than the engine.

My questions. Is it possible to fry the relay with two pumps wired in? And two, could I possibly blow out the regulator with too much pressure?

It starts and runs great right now with two pumps.

At this point, I think I'm going to install a new in tank pump due to the whine of the inline.

I've read that the Delphi or ACDelco pumps are the best. After my Delphi lasting a whopping year plus, I have my doubts. Any other recommendations?
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Old 02-27-2018, 04:22 PM   #2
95 S_Trucker
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Re: Fuel pump question

I would recommend an AC Delco EP381. Install a new strainer too. Part number TS7.
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Old 02-27-2018, 05:24 PM   #3
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You got a ton of money or worried about break down?

If not, why not just isolate the loud pump with rubber to quiet it down and wait till it craps out.
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Old 02-27-2018, 05:31 PM   #4
4carbcorvair
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Re: You got a ton of money or worried about break down?

Quote:
Originally Posted by speedygonzales View Post
If not, why not just isolate the loud pump with rubber to quiet it down and wait till it craps out.
I did that last night. I ended up cutting the sidewall out of an old tire as it was the thickest rubber I had around. It's a loud whine. I love the idea of the frame mounted pump, easy access. lol
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Old 02-28-2018, 02:51 PM   #5
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Re: Fuel pump question

Considering its a whooping 2 bolts to drop the tank, I don't see the internal pump being a big deal.
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Old 02-28-2018, 03:49 PM   #6
95 S_Trucker
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Re: Fuel pump question

Electric fuel pumps are better at pushing fuel than sucking it. And the pump will stay cooler in the tank.
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Old 02-28-2018, 03:59 PM   #7
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Re: Fuel pump question

Thanks all. I'll grab an ACDelco pump next week and give that a 'whirl'.

I think I'll leave the inline right where it is ready to go in case the pump goes out in the future.
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