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1994 Buick Century, 3.1 V6 Problems!

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Old Feb 26, 2014 | 03:07 PM
  #31  
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See, this whole time it could be electrical. I don't hear the fuel pump engaging AT ALL. I know what it sounds like but I just don't hear it, even if I have my head underneath the vehicle and turn the key.

My next test is to check line pressure before the fuel filter using a special T fitting with the kit and check for electrical. I've already switched relays with the blower fan, so it'* not a relay.. could be a fuse inside.

Be back.
Old Feb 26, 2014 | 04:09 PM
  #32  
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lack of pressure could be poor connections, power and ground but it has to be on if it runs and puts out 23
Old Feb 26, 2014 | 04:13 PM
  #33  
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Isn't 23 PSI a tad low? Even our 3.8'* need around 40.
Old Feb 26, 2014 | 04:14 PM
  #34  
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Swapped relays in engine bay, no change in pressure. Checked wire harness near gas tank looks fine.

I'm guessing weak fuel pump or clogged lines before filter.
Old Feb 26, 2014 | 04:17 PM
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im leaning toward the pump now but the regulator not doing anything bothers me a little
Old Feb 26, 2014 | 04:24 PM
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The FPR is probably still stuck in at the idle position, allowing most of the fuel to return to the tank. When load/RPM increases, the FPR is suppose to restrict the fuel going back to the tank.
Old Feb 26, 2014 | 11:43 PM
  #37  
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New fuel pump / sender hanger assembly will be here Friday.
Old May 25, 2022 | 12:14 PM
  #38  
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I guess I'm late to the thread, but I wonder if it was the check valve in the fuel pump. I had the same issues with my '94 Buick and ended up putting in an inline check valve and solved the fuel pressure issue.
Old May 25, 2022 | 02:51 PM
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Originally Posted by danjamesjr
Thanks! Yes I have, a little too many lol.

I can't get it scanned, no shops around have obd1 scanners :(

No CEL

Did not replace spark plug wires.

Thanks
Here'* a scanner that will show live data and all the different modules.
https://www.ebay.com/itm/27530246918...3ABFBMgsfzyJ9g
Old May 25, 2022 | 02:54 PM
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That bogging could be MAF. Unplug it and drive it. What does it do?



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