fuel pump problems
Pro
Joined: Mar 2013
Posts: 628
Likes: 12
From: Indiana
Your new fuel pump can and will go over 75-80 pounds. Just adjust the regulator to what ever you want. The stock style regulator is what's causing the 38 pounds not your fuel pump. All the new replacement FPR's I've bought lately cut off at 38 pounds which is only good for some earlier models yet they advertise that they fit all years.
As a side note my FSM says when doing the hose pinch test to try to keep the back pressure under 60 pounds so you don't create leaks at your fuel rail. Keeping that in mind when I installed my new adjustable FPR I backed it out two full turns before hitting the key. That way I didn't blow any seals before getting the air out of the system and checking the real pressure. It fired up at 37 pounds and a couple of turns later I had it at 46 pounds which is just right for my 96'.
As a side note my FSM says when doing the hose pinch test to try to keep the back pressure under 60 pounds so you don't create leaks at your fuel rail. Keeping that in mind when I installed my new adjustable FPR I backed it out two full turns before hitting the key. That way I didn't blow any seals before getting the air out of the system and checking the real pressure. It fired up at 37 pounds and a couple of turns later I had it at 46 pounds which is just right for my 96'.
Last edited by Klyde; Sep 24, 2013 at 06:49 PM.
Thread Starter
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
Your new fuel pump can and will go over 75-80 pounds. Just adjust the regulator to what ever you want. The stock style regulator is what's causing the 38 pounds not your fuel pump. All the new replacement FPR's I've bought lately cut off at 38 pounds which is only good for some earlier models yet they advertise that they fit all years.
As a side note my FSM says when doing the hose pinch test to try to keep the back pressure under 60 pounds so you don't create leaks at your fuel rail. Keeping that in mind when I installed my new adjustable FPR I backed it out two full turns before hitting the key. That way I didn't blow any seals before getting the air out of the system and checking the real pressure. It fired up at 37 pounds and a couple of turns later I had it at 46 pounds which is just right for my 96'.
As a side note my FSM says when doing the hose pinch test to try to keep the back pressure under 60 pounds so you don't create leaks at your fuel rail. Keeping that in mind when I installed my new adjustable FPR I backed it out two full turns before hitting the key. That way I didn't blow any seals before getting the air out of the system and checking the real pressure. It fired up at 37 pounds and a couple of turns later I had it at 46 pounds which is just right for my 96'.
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 12
" " the fuel return line...pinched it off...pressure went quickly to 38"
With the return line pinched you have taken the ( possibly faulty ) fuel regulator out of the equation so your pump
or fuel system is only generating 38 psi line pressure at max.
If your pump was good you would have seen the pressures noted above
My previous comment stands ; you can't get any more pressure than what your pump generates at present.
Thread Starter
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
Because you previously stated
" " the fuel return line...pinched it off...pressure went quickly to 38"
With the return line pinched you have taken the ( possibly faulty ) fuel regulator out of the equation so your pump
or fuel system is only generating 38 psi line pressure at max.
If your pump was good you would have seen the pressures noted above
My previous comment stands ; you can't get any more pressure than what your pump generates at present.
" " the fuel return line...pinched it off...pressure went quickly to 38"
With the return line pinched you have taken the ( possibly faulty ) fuel regulator out of the equation so your pump
or fuel system is only generating 38 psi line pressure at max.
If your pump was good you would have seen the pressures noted above
My previous comment stands ; you can't get any more pressure than what your pump generates at present.
Instructor
Joined: Nov 2012
Posts: 214
Likes: 7
From: Long Island
Thread Starter
Drifting
Joined: Jun 2013
Posts: 1,590
Likes: 60
From: ft myers FL/Munising MI
to troubleshoot the fuel system pressure problems....came a little further down the troubleshooting guide than I would have liked....since I have the manual, I always have been trying to start at the beginning.
Last edited by playsdixie; Sep 25, 2013 at 09:16 PM.
