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HOW TO: Check regulated fuel pressure, pump max output, & leakdown

  #31  
Old 11-23-2015, 07:58 PM
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Pages are too rough for toilet paper, and not absorbent enough for bird cage or cat box liner... pretty much worthless.
 
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Old 11-23-2015, 08:17 PM
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Originally Posted by Captain Hook View Post
Thanks! If something is not explained clearly enough, let me know.
You good Captain Hook.If I need a help I know where to go!
 
  #33  
Old 01-20-2016, 08:11 AM
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Originally Posted by Captain Hook View Post
Thanks! If something is not explained clearly enough, let me know.

So what would cause a regulated 45 psi fuel pressure with koeo but a direct fuel pressure of over 60.
 
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Old 01-20-2016, 02:39 PM
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With the engine off, and the fuel pump activated: 45psi at the service port could indicate a faulty fuel pressure regulator, or something else. 60psi at the fuel filter outlet could indicate a faulty fuel pump, or something else.


We also need the leakdown pressure at the service port, and at the fuel filter outlet, to make an accurate diagnosis. The article explains how to test them, and why all of the readings are necessary. Without all 4 readings, your guess is a good as mine
 
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Old 03-15-2016, 12:27 AM
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Nicely done, Sir.
 
  #36  
Old 04-07-2016, 08:07 AM
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I have my 1/4 MFL X 3/8 hose barb adapter, the hose and the clamps. As soon as my 1/4 MFL X 3/8 hose barb adapter I will grab some pictures of it all assembled and connected to the fuel filter.
 
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Old 04-08-2016, 07:42 AM
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Pictures as promised. If this is incorrect please feel free to remove this post.

Here are all the parts you will need.


Dorman #800-121 - $7.66


1/4” MFL X 3/8” hose barb adapter from Homebrewing.org - $6.08


18” (minimum) fuel injection rated fuel line - $7.99


Fuel Injection Hose Clamps - $2.99


Here are some pictures of the assembly. It is pretty straight forward so I assume I got it right

This end goes to the pressure tester


This end goes on the output of the fuel filter


Completed assembly
 
Attached Thumbnails HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_193833_zps2ts5dmhc.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_193913_zpsgbmagjlh.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_193926_zpsh7vcriut.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_193840_zpsnyizrafh.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_193935_zpsfaketk90.jpg  

HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_194656_zpsz3qv4ani.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_194723_zpsxawmxcq4.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160407_194750_zpswqoqamq1.jpg  

Last edited by Tajohns34; 04-08-2016 at 11:12 AM.
  #38  
Old 04-10-2016, 12:15 PM
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Perfect, thanks! I've got all the stuff to build one, but haven't got around to it yet. I built this one a few years ago and use it all the time. It connects inline at the fuel filter outlet. It's a bit more expensive, but it checks everything: regulated pressure, system leakdown, pump max output pressure & pump leakdown.



I've got another one that goes in the return line that checks for internal fuel pressure regulator leaks.
 
Attached Thumbnails HOW TO: Check regulated fuel pressure, pump max output, & leakdown-dsc_0008.jpg  

Last edited by Captain Hook; 04-10-2016 at 12:18 PM.
  #39  
Old 04-16-2016, 02:48 PM
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So since mine didn't work I ordered a pair of Dorman 800-086 (they come in pairs). You can also use a dorman 800-082, (straight) The 90 degree bend makes it much easier to hook up.



Same as the other. except this one fits my ACDelco fuel filter


Here it is on the filter. Make sure you pull the plastic clip out of the fitting if yours is still on the fuel filter.


Once you have everything hooked up it should look like this when connected to the pressure tester. Mine worked great
 
Attached Thumbnails HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160416_113720_zpsd6gqes09.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160416_113755_zpsrtrrq2xn.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160416_143626_zpspykygm1h.jpg   HOW TO: Check regulated fuel pressure, pump max output, & leakdown-20160416_143638_zpsbbvvpuxm.jpg  

Last edited by Tajohns34; 04-16-2016 at 02:51 PM.
  #40  
Old 06-22-2016, 05:20 PM
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Thank you very much for this write-up!! I noticed there was no vacuum hose connected to my fuel pressure regulator so I became worried, but this answered that question! Thanks again, all your work is much appreciated!
 

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