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A1000 pump Dropping Pressure?
#1675432
09/21/14 10:50 PM
09/21/14 10:50 PM
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Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
Dragula
OP
I Live Here
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OP
I Live Here
Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
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Car wasn't running right, switched carburators thinking it was the SV1. I found that after a pass with my 4150 that seemed way slow and lean, I found my pressure was down, and so I adjusted it. I knew it was correctly adjusted....Next pass, it was, better, but low again...Adjusted it again, and it dropped again.....
Next day, it was way too high when I fired the car up....Not sure what the heck is with it.
Drained the tank and removed the pump...filter had a bunch a gunk in it...but not enough to cause an issue...Pulled the regulator apart nothing there either...Needs a pump?
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Re: A1000 pump Dropping Pressure?
[Re: MR_P_BODY]
#1675434
09/21/14 11:17 PM
09/21/14 11:17 PM
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Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
Dragula
OP
I Live Here
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OP
I Live Here
Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
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Quote:
Have you checked voltage AT the pump.. if you knew
the amp draw you could check that also
In a carburated app, it should be 8-10 amps...I did find the two bolts to the wires slightly loose, but doubt that is the missing 10lbs of pressure. And its already out of the tank....
My biggest regret was running AN08 for this pump install. I wish I had put AN10 thruout like on my pro street truck...This will be expensive if there is a restriction causing the pump to really have an issue.
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Re: A1000 pump Dropping Pressure?
[Re: Dragula]
#1675435
09/21/14 11:50 PM
09/21/14 11:50 PM
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Joined: May 2006
Posts: 1,260
New Mexico
Adobedude
pro stock
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pro stock
Joined: May 2006
Posts: 1,260
New Mexico
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Double check the location and the flow direction of your pre and post pump filters. DAMHIK. 
2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
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Re: A1000 pump Dropping Pressure?
[Re: Dragula]
#1675439
09/22/14 05:39 AM
09/22/14 05:39 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
New pump on the way...I will call Aeromotive tomorrow if I get the chance...I could sware they said the AN08 would be ok....
You need #10 minimum in the inlet. I bet you there's nothing wrong with your old pump. Don't buy another one, unless you burned up the original by cavitation. Which happens to many pumps.
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Re: A1000 pump Dropping Pressure?
[Re: pittsburghracer]
#1675445
09/22/14 12:47 PM
09/22/14 12:47 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Your not using a liquid filled pressure gauge are you? If so you might want to look into draining it. 
 If you have a filled gauge under the hood
as the temp builds it presses back on the gauge guts
and will lower the reading.. the higher the temp the
lower the filled gauge will read.... if you have one
just drain the oil and leave it vented
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Re: A1000 pump Dropping Pressure?
[Re: MR_P_BODY]
#1675446
09/22/14 06:41 PM
09/22/14 06:41 PM
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Joined: Dec 2004
Posts: 298
Shelton, Ct.
572_HEMI_Cuda
enthusiast
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enthusiast
Joined: Dec 2004
Posts: 298
Shelton, Ct.
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Quote:
Quote:
Your not using a liquid filled pressure gauge are you? If so you might want to look into draining it.
If you have a filled gauge under the hood
as the temp builds it presses back on the gauge guts
and will lower the reading.. the higher the temp the
lower the filled gauge will read.... if you have one
just drain the oil and leave it vented
that's fine and all but the car is slowing down and if the gauge was working before, Randy needs to look at the pump or pre and post filters.
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Re: A1000 pump Dropping Pressure?
[Re: 572_HEMI_Cuda]
#1675448
09/22/14 07:05 PM
09/22/14 07:05 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Your not using a liquid filled pressure gauge are you? If so you might want to look into draining it.
If you have a filled gauge under the hood
as the temp builds it presses back on the gauge guts
and will lower the reading.. the higher the temp the
lower the filled gauge will read.... if you have one
just drain the oil and leave it vented
that's fine and all but the car is slowing down and if the gauge was working before, Randy needs to look at the pump or pre and post filters.
Thats true... but he also is saying that the pressure
is falling off.. we can assume they are related..
it most likely will be filter or pump or both.. and
thats assuming the gauge was working right before
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Re: A1000 pump Dropping Pressure?
[Re: MR_P_BODY]
#1675449
09/22/14 07:33 PM
09/22/14 07:33 PM
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Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
Dragula
OP
I Live Here
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OP
I Live Here
Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
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Most of the gunk was the excess thread sealer used on the lid of my custom fuel cell. As I threaded the screws in, the rest must have fell into the cell. I have no post filter after the fuel pump, so anything that gets past the pre filter, 100 micron stainless, it goes all the way up... The gauge is/was liquid, and will be replaced shortly after talking with Aeromotive. I did not know that about the liquid ones.... With that said, I am not sold that it is actually the pump, but it was really lean and this is a known good carb...It went 6.15 last week on the Duster. Its funny because I do not care for the racket the Magna Fuel makes in the Duster nor the bouncy readings on the pressure gauge, but that car runs fine. 
Last edited by Dragula; 09/22/14 07:36 PM.
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Re: A1000 pump Dropping Pressure?
[Re: Dragula]
#1675450
09/22/14 10:46 PM
09/22/14 10:46 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Most of the gunk was the excess thread sealer used on the lid of my custom fuel cell. As I threaded the screws in, the rest must have fell into the cell. I have no post filter after the fuel pump, so anything that gets past the pre filter, 100 micron stainless, it goes all the way up...
The gauge is/was liquid, and will be replaced shortly after talking with Aeromotive. I did not know that about the liquid ones....
With that said, I am not sold that it is actually the pump, but it was really lean and this is a known good carb...It went 6.15 last week on the Duster. Its funny because I do not care for the racket the Magna Fuel makes in the Duster nor the bouncy readings on the pressure gauge, but that car runs fine.
So this carb was on another engine last week.. what
is the weight of the 2 cars and what is the difference
in rpm... did you jet it up on this car since you
think its lean
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I`d be steppin up big time. 
