New Fuel Pump Pressure Question
Thread Starter
Safety Car
Joined: Feb 2000
Posts: 3,771
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From: MANDEVILLE, LA La
New Fuel Pump Pressure Question
New fuel pump in the 95'.Turn on key fuel pressure jumps to 47 Psi...after the 2 second cut off it drops to about 20 Psi...
Question:Is this bleed down rate acceptable? The FSM says "It drops a little". New Airtex Pump and new Regulator.Runs Great once started. I don't suspect a leaking Injector as it runs too good. I've heard that the Airtex pumps have some issues with the ball checks leaking down.?
Has anyone experienced this?
Question:Is this bleed down rate acceptable? The FSM says "It drops a little". New Airtex Pump and new Regulator.Runs Great once started. I don't suspect a leaking Injector as it runs too good. I've heard that the Airtex pumps have some issues with the ball checks leaking down.?
Has anyone experienced this?
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
That is way too fast. Should not get that low for at least 30 minutes or so. I would first check out the FPR. It could be leaking fuel back into the vacuum line. See if it is wet at all with fuel when you pull off the line. OR, take vacuum line off the FPR and pressurize system and see if it comes out.
If OK, then I would pinch off the return line at the tank area and pressurize line and see if it bleeds down fast. If it does not, the FPR is no good.
If OK, you have a problem in the tank with the check valve on the pump. (let's not hope so)
Thread Starter
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
Thanx Guys.
Thread Starter
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
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Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
If your going the route of getting another pump from another source, then...............
I would check first to see if Advanced auto will give you your money back and not just want to give you a repalcement pump.
I would check first to see if Advanced auto will give you your money back and not just want to give you a repalcement pump.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
Use a new tank gasket too..........
And yes, the leakdown is wayyy too fast. Your 2 second "prime" should hold that pressure for a couple hrs.
If AZ will exchange fine. The goal is to get a pump that holds pressure. If they won;t refund just keep changing pumps and gaskets until THEY cry.... Unless its a performance pump, the basic ability is adequate. The pumps are ALL damaged the same way...running with tank to low and running trash thru them.
Clean the tank out and use the new screen. Construct a "well" for the pump to live in so its never dry again and you'll be surprised at how long the dime store pump will last.
And yes, the leakdown is wayyy too fast. Your 2 second "prime" should hold that pressure for a couple hrs.
If AZ will exchange fine. The goal is to get a pump that holds pressure. If they won;t refund just keep changing pumps and gaskets until THEY cry.... Unless its a performance pump, the basic ability is adequate. The pumps are ALL damaged the same way...running with tank to low and running trash thru them.
Clean the tank out and use the new screen. Construct a "well" for the pump to live in so its never dry again and you'll be surprised at how long the dime store pump will last.
