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Repeatedly failing mechanical fuel pump

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Old 10-24-2017, 06:08 AM   #1
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Repeatedly failing mechanical fuel pump

Hello everyone,

I recently bought an 87 Toyota pickup in decent shape but the fuel pump keeps failing, I am thinking the tank could have sediments in it or something along those lines but I thought I would ask other opinions. Other than that would there be any other things to check or reasons why it would be killing one fuel pump after another, I have put 2 new ones on it now.

Thanks in advance!
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Old 10-24-2017, 06:27 AM   #2
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Seems I recall that there is supposed to be a shim that spaces the pump out from the head, effectively shortening the pumps stroke.

Does your engine have this spacer installed between the pump and the head??

Like this:::

https://images.search.yahoo.com/yhs/...f&action=click
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Old 10-24-2017, 07:55 AM   #3
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That was the problem, no shim in between the pump and the block. Thank you so much millball!!!
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Old 11-02-2017, 03:26 PM   #4
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Well another fuel pump went bad but this time it is leaking out of the weep hole in the bottom of the pump, just pump defect of something else???
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Old 11-02-2017, 03:56 PM   #5
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What brand of fuel pump are you using?

Did you get a new fuel pump AFTER you installed the spacer?

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Old 11-02-2017, 04:35 PM   #6
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Car quest.

Yes brand and new pump after spacer
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Old 11-03-2017, 12:55 AM   #7
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Red face

Poor quality on the last pump .

Maybe you have a fuel pump curse did you make anyone mad??
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Old 11-03-2017, 07:29 AM   #8
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Hahaha I must have. I think the truck sat for a while before I bought it and I’m just catching all the little thinks that have went out over time. I’m going to clean the tank and put in another fuel filter to see if that helps
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Old 11-12-2017, 06:00 AM   #9
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Yet another pump went bad. Leaking out of the weep hole again. Not sure what to do anymore
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Old 11-12-2017, 06:50 AM   #10
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Has any one of these pumps been a genuine Toyota spare part??

What were the countries of origin??
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Old 11-12-2017, 07:36 AM   #11
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They are aftermarket, car quest made in the USA. That’s just the brand of fuel pump the part stores near me carry. I’m open to any ideas, I’ve been trying to look up different brands that might be better.
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Old 11-12-2017, 10:49 AM   #12
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Just a thought. Have you looked at the fuel pump drive eccentric?
also
How thick is the spacer you are using?
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Old 11-12-2017, 11:03 AM   #13
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Originally Posted by L5wolvesf View Post
Just a thought. Have you looked at the fuel pump drive eccentric?
also
How thick is the spacer you are using?
from what I remember there are two different thickness spacers, been awhile since I my 84 with a 22R but I had similar issue eating pumps, i had the smaller spacer.
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Old 11-12-2017, 05:18 PM   #14
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I have not checked the eccentric. I will check that next then and I am using a spacer that looks to be about an 1/8 inch thick.
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Old 11-14-2017, 10:09 AM   #15
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I have not checked the eccentric. I will check that next then and I am using a spacer that looks to be about an 1/8 inch thick.
I just measured the spacer on mine 1/4 inch thick, black plastic-like material.
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Old 11-14-2017, 10:23 AM   #16
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Thank you! I just got a call back from the local toyota dealer and they said the same. I will be replacing my spacer. Fingers crossed. Thank you all for all the help!!!
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