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

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Old Feb 9, 2015 | 10:43 AM
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The 800-170 connects to the fuel filter outlet. The LFA116 connects to the 800-170. The LFA80 connects to the LFA116. The fuel pressure tester connects to the LFA80.
 
Old Feb 9, 2015 | 01:14 PM
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The rest made sense, I just didn't think it would be that style of thread.
 
Old Feb 9, 2015 | 07:24 PM
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Yup, service port is 1/4" MIF, with a Schrader valve. Don't need a Schrader for the test adapter. Just need to wrap a rag around it when you disconnect it
 
Old Feb 15, 2015 | 01:47 PM
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Great write up. Thanks for spending the time to inform us with this great information. I don't know what else you could have added. Thanks again.
 
Old Feb 15, 2015 | 02:06 PM
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Thanks, I hope it was helpful
 
Old Apr 3, 2015 | 08:47 PM
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what size is the flare wrench to remove the fuel filter Captain Hook??
 
Old Apr 3, 2015 | 09:28 PM
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16mm for the flare nut, 5/8" will fit, but it's tight. 20mm on the filter, 13/16" will fit, but it's sloppy.
 

Last edited by Captain Hook; Apr 3, 2015 at 09:34 PM.
Old Apr 3, 2015 | 09:36 PM
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Thank you so much. I guess 16mm flare wrench is a specialty wrench can't find one. Guess I'll try sears. Thanks again.
 
Old Apr 3, 2015 | 09:54 PM
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16mm crow foot flare nut wrench, (Sears has them) on a 3/8" ratchet works great.


http://www.craftsman.com/craftsman-1...1&blockType=G1
 

Last edited by Captain Hook; Apr 3, 2015 at 10:03 PM.
Old Jul 13, 2015 | 05:45 AM
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My 2000 blazer zr2 cranks, but won't start. Narrowed down to fuel. Threw money at it when fuel pressure tested below 55 psi cranking. New pump didn't change a thing. Wasted time and money. Started thinking pressure regulator. While I was searching more about how to further diagnose that, I hooked up battery charger to maintain. Damn thing fired right up. Unhooked battery charger and it reverted back. My question is how is this possible? My battery tests at 13 volts unhooked.
 

Last edited by Miss_tcjj; Jul 13, 2015 at 05:50 AM. Reason: Adding info



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