93 Buick LeSabre - Possible failing fuel pump???

Well, I finally got down to below half tank and it started stalling as I
came to a stop again. When I got home last night I checked the fuel
pressure and with the key on and the engine off it comes up to ~43/44
psi and holds steady. According to my information, this should be
40-43, so it looks fine. While running the pressure drops to ~36 psi
and fluctuates no more than 1 psi either way.

At this point I am wondering if this is enough of a problem to cause any
of the symptoms I am having. Since I think the fuel pump is toward the
back of the tank and the stalling occurs as I am stopping, the gas must
be moving toward the front of the tank. I pulled out the ramps and
backed the car up on them to lean the car forward as if stopping
quickly. Checking the pressure gauge now shows periodic semi slow drop
from ~36 to ~20 psi and then rapid increase back to ~36. Pulling the
vacuum line from the pressure regulator only causes the pressure to stay
high longer, but the periodic drops still occur.

Interesting... I guess it's time to order a fuel pump. Anyone have an
explanation or previous experience as to what is happening with the fuel
pump that causes it to have problems as it is uncovered? Filling up
this morning once again solved the problem for now.

Thanks,
Greg




Greg Baumgratz wrote:
 > First time posting here - so if I am forgetting something, forgive me.
 >
 > 1993 Buick LeSabre
 > 3.8 V6
 >
 > For the past few months I have had a problem with stalling. It was
 > happening only when I had less than 1/4 tank of gas. It would not stay
 > running and it would drive fine as long as I was moving but as I came to
 > a stop it would stall. I was just filling the tank more frequently to
 > keep from having the problem and it was working. I also changed the
 > fuel filter and experienced the same problem. Now the stalling is
 > happening just as I am falling below a half tank and I am slowing to a
 > stop. I never have any problem restarting it either. As I said,
 > filling it up always solves the problem. I am going to borrow or pick
 > up a fuel pressure tester this weekend, but I thought I'd ask if anyone
 > thought on another cause of the problem.
 >
 > As a side note, there are no trouble codes present either.
 >
 >
 > Thanks,
 > Greg
 >
 >
 >> Stay informed about: 93 Buick LeSabre - Possible failing fuel pump??? 

I wonder if the pump suction "strainer" could be giving you a problem?

"Greg Baumgratz" wrote in message

 > Well, I finally got down to below half tank and it started stalling as I
 > came to a stop again. When I got home last night I checked the fuel
 > pressure and with the key on and the engine off it comes up to ~43/44 psi
 > and holds steady. According to my information, this should be 40-43, so
 > it looks fine. While running the pressure drops to ~36 psi and fluctuates
 > no more than 1 psi either way.
 >
 > At this point I am wondering if this is enough of a problem to cause any
 > of the symptoms I am having. Since I think the fuel pump is toward the
 > back of the tank and the stalling occurs as I am stopping, the gas must be
 > moving toward the front of the tank. I pulled out the ramps and backed
 > the car up on them to lean the car forward as if stopping quickly.
 > Checking the pressure gauge now shows periodic semi slow drop from ~36 to
 > ~20 psi and then rapid increase back to ~36. Pulling the vacuum line from
 > the pressure regulator only causes the pressure to stay high longer, but
 > the periodic drops still occur.
 >
 > Interesting... I guess it's time to order a fuel pump. Anyone have an
 > explanation or previous experience as to what is happening with the fuel
 > pump that causes it to have problems as it is uncovered? Filling up this
 > morning once again solved the problem for now.
 >
 > Thanks,
 > Greg
 >
 >
 >
 >
 > Greg Baumgratz wrote:
  >> First time posting here - so if I am forgetting something, forgive me.
  >>
  >> 1993 Buick LeSabre
  >> 3.8 V6
  >>
  >> For the past few months I have had a problem with stalling. It was
  >> happening only when I had less than 1/4 tank of gas. It would not stay
  >> running and it would drive fine as long as I was moving but as I came to
  >> a stop it would stall. I was just filling the tank more frequently to
  >> keep from having the problem and it was working. I also changed the fuel
  >> filter and experienced the same problem. Now the stalling is happening
  >> just as I am falling below a half tank and I am slowing to a stop. I
  >> never have any problem restarting it either. As I said, filling it up
  >> always solves the problem. I am going to borrow or pick up a fuel
  >> pressure tester this weekend, but I thought I'd ask if anyone thought on
  >> another cause of the problem.
  >>
  >> As a side note, there are no trouble codes present either.
  >>
  >>
  >> Thanks,
  >> Greg
  >>
  >>
 >
 >> Stay informed about: 93 Buick LeSabre - Possible failing fuel pump??? 

Could be I suppose, either way, I think the tank has to come down. I
think I'll wait for it to get a little warmer aound here as it is still
fine for the first probably 5/8 of a tank. I'll follow up when I drop
the tank.

Greg



Silver Surfer wrote:
 > I wonder if the pump suction "strainer" could be giving you a problem?
 >


 >
  >>Well, I finally got down to below half tank and it started stalling as I
  >>came to a stop again. When I got home last night I checked the fuel
  >>pressure and with the key on and the engine off it comes up to ~43/44 psi
  >>and holds steady. According to my information, this should be 40-43, so
  >>it looks fine. While running the pressure drops to ~36 psi and fluctuates
  >>no more than 1 psi either way.
  >>
  >>At this point I am wondering if this is enough of a problem to cause any
  >>of the symptoms I am having. Since I think the fuel pump is toward the
  >>back of the tank and the stalling occurs as I am stopping, the gas must be
  >>moving toward the front of the tank. I pulled out the ramps and backed
  >>the car up on them to lean the car forward as if stopping quickly.
  >>Checking the pressure gauge now shows periodic semi slow drop from ~36 to
  >>~20 psi and then rapid increase back to ~36. Pulling the vacuum line from
  >>the pressure regulator only causes the pressure to stay high longer, but
  >>the periodic drops still occur.
  >>
  >>Interesting... I guess it's time to order a fuel pump. Anyone have an
  >>explanation or previous experience as to what is happening with the fuel
  >>pump that causes it to have problems as it is uncovered? Filling up this
  >>morning once again solved the problem for now.
  >>
  >>Thanks,
  >>Greg
  >>
  >>
  >>
  >>
  >>Greg Baumgratz wrote:
  >>
   >>>First time posting here - so if I am forgetting something, forgive me.
   >>>
   >>>1993 Buick LeSabre
   >>>3.8 V6
   >>>
   >>>For the past few months I have had a problem with stalling. It was
   >>>happening only when I had less than 1/4 tank of gas. It would not stay
   >>>running and it would drive fine as long as I was moving but as I came to
   >>>a stop it would stall. I was just filling the tank more frequently to
   >>>keep from having the problem and it was working. I also changed the fuel
   >>>filter and experienced the same problem. Now the stalling is happening
   >>>just as I am falling below a half tank and I am slowing to a stop. I
   >>>never have any problem restarting it either. As I said, filling it up
   >>>always solves the problem. I am going to borrow or pick up a fuel
   >>>pressure tester this weekend, but I thought I'd ask if anyone thought on
   >>>another cause of the problem.
   >>>
   >>>As a side note, there are no trouble codes present either.
   >>>
   >>>
   >>>Thanks,
   >>>Greg
   >>>
   >>>
  >>
 >
 >
 >> Stay informed about: 93 Buick LeSabre - Possible failing fuel pump??? 

I have a 93 buick LeSabre and found the baskit in the tank had a crack in
it and when I stoped the gas would run to the frunt of the tank and the
car would stall I replacted the tank. The pump was sucking air and the car
would stall.
 >> Stay informed about: 93 Buick LeSabre - Possible failing fuel pump??? 

I have the exact same problem as Greg Baumgratz. Has the solution
been found?

I have already replaced the fuel tank, fuel pump, fuel filter, fuel
pressure regulator, and throttle position sensor since the beginning
of the year (2005).

EDIT: Mine is also a 93 Buick LeSabre.
 >> Stay informed about: 93 Buick LeSabre - Possible failing fuel pump???