W124 1994 E320 Fuel Pump Question

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Picked up a 94 E320 a few days ago for a few hundred dollars. 175,000 miles, interior in fantastic condition, leather, Black Pearl Metallic exterior in decent shape, a few clear coat issues, but nothing to bad. No signs of being wrecked, no rust, no dings or dents, etc.

Why was it only $300??

Apparently, from what I was told, was the original owner (family friend of seller) took great care of vehicle but the fuel pump failed which coincided with an illness of the original owner and so the car sat in her garage.....and sat......and sat some more. Until she asked the seller to just get it out of her garage since she no longer was able to drive due to her age and health.

Seller told me the car sat for around 5 years.

Anyway, original plan was to part it out. However, after thinking about it, just seems like a complete waste if it something as simple as fuel pumps to get it running. I know it will need many, many things due to being neglected for so long, but I basically want to see if I can get it running and go from there.

I purchased a cheapo fuel pump and filter off Amazon, drained all the nasty fuel, and removed old pumps and filter. Tested old pumps and they are non functioning. Unfortunately, for some reason, I only ordered 1 pump and this car has the dual pump setup.

My question is this: If I only hook up 1 pump, will the one pump be strong enough for a reliable test to see if the car will run?

I have already installed the one pump and filter, just waiting for battery to charge a little more before I test it out.

Thanks in advance.

-Scott