 Fuel pump is noisy, good noise or bad? |
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| malcolm2 |
 Sep 22 2013, 11:46 AM
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#1
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Advanced Member  Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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Fuel pump sounds funny.
Short youtube video of my 75 fuel pump and the car is idling. I have an inline pressure gauge and it flickers between 30 and 40 psi. Factory FI. Is this a normal sound? Or the sound of a dying pump? Clark |
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Replies(1 - 8)
| SirAndy |
Sep 22 2013, 12:03 PM
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#2
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Resident German Group: Admin Posts: 41,644 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(malcolm2 @ Sep 22 2013, 10:46 AM)  Fuel pump sounds funny. Short youtube video of my 75 fuel pump and the car is idling. I have an inline pressure gauge and it flickers between 30 and 40 psi. Factory FI. Is this a normal sound? Or the sound of a dying pump? Check the fuel filter and bottom of the tank for debris. Sounds like it's not getting enough fuel ... (IMG:style_emoticons/default/popcorn[1].gif) |
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| TheCabinetmaker |
Sep 22 2013, 02:41 PM
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#3
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I agree with andy. My 75 is noisy when the filter is clogged. Its not near that noisy though. Its starving for fuel, but it might be near toast from the amount of time it sat dry. I've heard them quieten up after driving for a while too. For sure replace the fiter anyway.
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| malcolm2 |
Sep 22 2013, 04:23 PM
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#4
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(The Cabinetmaker @ Sep 22 2013, 03:41 PM) I agree with andy. My 75 is noisy when the filter is clogged. Its not near that noisy though. Its starving for fuel, but it might be near toast from the amount of time it sat dry. I've heard them quieten up after driving for a while too. For sure replace the fiter anyway. Everything is brand new but the pump. I pulled the tank, cleaned it and put POR-15 in the tank, got new hoses, and a new filter, new sock. I tested the pump with gas and a 12v battery, it pumped, so I decided to keep it. |
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| TheCabinetmaker |
Sep 22 2013, 05:34 PM
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#5
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Maybe a linked line under the tank? I had one I had to remove 3 times to get it right.
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| ndfrigi |
Sep 22 2013, 07:39 PM
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#6
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Advanced Member Group: Members Posts: 2,928 Joined: 21-August 11 From: Orange County Member No.: 13,474 Region Association: Southern California
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It happened to me after dropping back my fuel tank and tried checking the fuel hose thru the under car access hole and saw 1 fuel hose is bent. So I removed my tank to re arrange the fuel hoses.
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| Mblizzard |
Sep 22 2013, 07:43 PM
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#7
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Given the fact that you had to move the tank to get the MC installed, I am betting on crimped line.
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| malcolm2 |
Sep 23 2013, 10:02 AM
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#8
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(Mblizzard @ Sep 22 2013, 08:43 PM) Given the fact that you had to move the tank to get the MC installed, I am betting on crimped line. It was making that noise before too. Maybe not as much, it only seemed to do it while I was idling. Maybe that cause I could walk around while idling, now I am driving, and hear it all the time (since the front hood is off too). I have gotten pretty good at taking this thing apart, so I should not have a problem getting the tank out ONE MORE TIME. |
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| Mblizzard |
Sep 23 2013, 10:08 AM
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#9
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Ugh......
There was a thread that identified some lower cost pumps that may be worth a try to,see if it is the pump. As it goes with 914s, it is always the very last remaining part of a system that you have not replaced that turns out to have been the problem all along! |
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