Question about Buick Century

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1995 Buick Century. Engine stalls after ~5 minutes when started warm. Engine runs rough for a few seconds before stalling. Happens even at highway cruising speed. Will crank and fire and stall when you try to restart. However if you wait 5 seconds and restart, it may run for hours. Happens more frequently when air conditioner on and gas tank half full. Restarts better in park than in neutral. Replaced fuel filter. Used fuel system cleaner for six months.

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1 Answer

EdCarCal

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  • Buick Master
  • 1,172 Answers

Using excessive fuel cleaner can damage injectors and the fuel pump - sounds like your problem is the fuel pump bearings, and you will probably have to have it replaced.

Posted on Jun 14, 2017

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5 Related Answers

Anonymous

  • 2 Answers

SOURCE: 1995 Saturn SL2 Continues To Stall

I had same problem a couple years ago with 95 sl2, i had new wires and plugs instaled and they replaced the valves also. car works great since then...

Posted on Feb 11, 2009

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Anonymous

  • 1118 Answers

SOURCE: 1995 Buick LeSabre - Stalls then restarts while driving

Has the fuel filter been chg. lately. If it has, maybe a fuel pressure test is in order. Fuel pump might be geeting weak and does not show up until it gets warmed up. Fuel pumps are a common problem on this type of cars.

Posted on Apr 03, 2009

Anonymous

  • 1118 Answers

SOURCE: cannot get 1987 chevy van 20 to keep running... stalls out

Best do a fuel pressure test. Should have chg. fuel filter from the get go. The only other filter is on the end of the fuel pump in tank. Bad gas and dirty gas will plug up fuel filter, hense burn pump up.

Posted on Apr 11, 2009

GM Elec

Bruce Bracey

  • 1000 Answers

SOURCE: continous surging and stalling

Per your description, I would suspect a fuel pump issue. When the fuel pump is running the pump impeller heats up. On an older pump the impeller can begin to seize up and momentarily stops and starts. Some times it just stops and has to cool down for a couple of minutes, then is ok for a while.
To test this theory, when the engine stalls and stops, your mechanic can use a rubber mallet and hit the bottom of the gas tank, this will free the pump impeller and the car will start again.
Or, have him install a fuel pressure gauge and go for a drive. If the pressure begins to fluctuate and drop, you know the pump is causing the issue.
Good luck, let me know.
Regards,

Posted on Apr 30, 2009

Anonymous

  • 245 Answers

SOURCE: Engine stalls

sounds like one of a couple things could be causing you problems first would be the fuel pump may be wearing out. these are a mechanical pump and should be producing over 35psi at the injection pump if you have a way to put a gauge on it you could check this under full throttle is when you want to watch it though. fuel gauges are quite inexpensive and are handy to have in the truck anyway. another thing i have seen cause this is the check valve on the discharge of the pump there is a spring and ball in the return line banjo fitting that holds the fuel pressure at a constant 35 psi when that gets weak it allows more fuel to return to the tank which will let it run at lower rpm's but not under full load. hope this helps

Posted on May 18, 2009

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