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Old 05-26-2018, 12:22 AM   #51
Lando
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Originally Posted by hiperfauto View Post
Wow, that's a lot of crud. Are you going to pull the tank and clean it out? The in tank filter must be plugged up too, no?
I am planning on running the fuel level down and dredging the bottom of the tank, flushing It out and cleaning everything in the sender pump assembly. I'll probably get to that in a couple weeks.
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Old 05-30-2018, 07:34 PM   #52
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Fuel pressure began dropping into the low thirties today. Pulled the filter again, and dumped out more of the same crud. Looks like I’m going to have pull that tank sooner than later.
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Old 05-30-2018, 10:36 PM   #53
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Originally Posted by Lando View Post
This is what came out of the inlet of the fuel filter...
We have a winner.
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Old 05-30-2018, 10:52 PM   #54
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We have a winner.
Why didn't you solve all my problems two years ago?!
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Old 06-01-2018, 12:05 AM   #55
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Why didn't you solve all my problems two years ago?!
I didn't see this thread two years ago.
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Old 06-01-2018, 01:56 AM   #56
Lando
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Well thanks for nothing!

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Old 06-04-2018, 02:49 AM   #57
Lando
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Here's the fuel that was in the tank:


Here's what it looked like inside the tank:


Used a mason jar lid to seal up the sending unit hole:



Duct tape for the filler hole:


Phosphoric acid is soaking in there right now. We'll see how clean I can get it.

Last edited by Lando; 06-04-2018 at 04:38 AM..
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Old 06-04-2018, 08:36 PM   #58
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Have you figured out what the gack is in your fuel?

That's a little more than a crappy load of fuel!

Or are you de-hibernating?
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Old 06-04-2018, 08:54 PM   #59
Lando
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Originally Posted by Dirty Rick View Post
Have you figured out what the gack is in your fuel?

That's a little more than a crappy load of fuel!

Or are you de-hibernating?
I think some of that discoloration is the under coating dissolving as the fuel rolls down the bottom of the tank while draining out of the pet cock. It had about 2" of rust piled up at the bottom. I am not dehibernating, I've been driving this car for the last 6 years.
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Old 06-04-2018, 09:57 PM   #60
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Got the tank cleaned, new in-tank pump, new seals, replace the fuel filter again.

My process for cleaning the tank went like this:

1. Empty and remove gas tank, remove sender/pump assembly.
2. Pour in 1 gal of biodegradable degreaser
3. Shake thoroughly, let stand for 15 mins, shake and rotate throughout, drain into bucket for disposal.
4. Pour 1 gal of muriatic acid, add 4 gal of water.
5. Add a couple of handfuls of random nuts and bolts.
6. Close off the bung hole with a mason jar cap, the old o ring and the gland nut.
7. Duct tape over the hole for the filler.
8. Shake vigorously and repeatedly for about two hours.
9. Drain and neutralize the acid solution with baking soda
10. Repeat steps 4-9 with phosphoric acid, except for only 30 mins.
11. Rinse thoroughly with garden hose, once it starts coming out clear, keep flushing it for another ten minutes.
12. Add 2 quarts of denatured alcohol to dry it out. Shake vigorously, dump into bucket.
13. Empty a can of WD40 into the tank, shake and coat the entire inside with it. Drain into a bucket, remove the bolts and nuts.
14. Reinstall and fill promptly.

Got mine looking like this:
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