Question about 1995 Buick LeSabre

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Put a new fuel pump in ,put a new pressure regulater in, wont start ,spray starting flueid in starts and runs only on starting fluid.what is the problem.

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  • Buick Master
  • 21,873 Answers

Have you checked to see if the pump relay is sending power to the pump ?

Posted on Jul 31, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: will start then dies

On the regals they have a ceramic resistor on the passanger side under the fender. It heats up and over time it tends to brake and the wire inside tends to rust away. The fuel pumps run in 2 different speeds. Had the same problem. Dealer only part yet the car would run and you would think it was the fuel pump. Turn the key it kicks on then start and dies out. Ceramic on the pass side would need replaced. It is white about 2-3 inches long or so held on with 2 bolts i do believe. Ill find a bulliten i found online to help me diagnos the problem. :) hopefully this helps someone out instead of spendin $$$ that ya cant afford with the recession eh?

Posted on Apr 01, 2009

honeymokey
  • 3113 Answers

SOURCE: 1994 Buick Park Ave fuel pump or relay reset??

No switch. Take a big rubber hammer and strike bottom of tank while someone is cranking car. Sometimes this will make pump work until you shut it off to replace the pump.

Posted on Jun 13, 2009

  • 1596 Answers

SOURCE: replaced fuel pump, pump wiring harness, fuel

Fuel Pump RELAY & FUSE CHECKED & DO you Have POWER "TO" Fuel Pump ? ALSO OIL Sending Unit Supplys the GROUND To Fuel Pump , This is A Saftey FEATURE that Shuts Down Fuel If ENGINE Looses OIL PRESSURE . And If This OIL Sending Unit or also Called (OIL PRESSURE SENSOR) << If It FAILS it WILL Cause What Seems Like A Fue Pump Problem But Is Rally Just The Sensor that is BAD. HOPE this Sheds Light on Your Problem !

Posted on Sep 30, 2009

  • 3911 Answers

SOURCE: 1998 Buick Century wont start.

You have a fuel starvation problem, fuel pump, pressure regulator, injectors, any or all of them could be the reason why you are not getting fuel. Someone is going to have to lay hands and eyes on the thing and check it out.

Posted on Jul 26, 2011

PowerOfLinds
  • 33 Answers

SOURCE: my 2003 buick rendezvous i

Possible fuel pump relay or fuse check for 12volts at pump if not suspect power issues if there is power and you can hear it hum injectors not pulsing of security system issues

Posted on Aug 07, 2011

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1 Answer

Intermittent fuel delivery problem. 93 Chevy Lumina APV 3.1L with throttle body fuel injection.


year/make/model/engine size??? Do a fuel pressure test to see what the pressure is. Low/no pressure= poor spray

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possible pressure regulater no good ,is this happening for all injector ports ? or just one ? also check fuel pressure from pump ,are you getting electrical pulse to each injector ,that would show that computer is working , one last resort is try just a spot of starting fluid if it starts and runs its a fuel supply problem please get back to me hopefuly this works .Woody

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Have a1998 astro van that wont start until I spray starting fluid in the throttle body, then starts up and runs fine until about two hours later I go to start it back up and it wont start again.PLEASE HELP...


The first thing you need to check is fuel pressure. This type of fuel system requires a minimum fuel pressure of 56 psi to start. Anything less, even as little as 1psi. And it will not start. It starts and runs when you add the starting fluid because the poppets (the mechanical injectors located at each cylinders intake runner) require less fuel pressure to operate when the intake is under vacuum.

This is a classic symptom of low fuel pressure. A new fuel pump is the typical fix for this problem. Don't skimp on quality if you do need a new fuel pump. They are not all the same.

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I have a 98 s-10 it wont start it has 40 to 45 pounds of pressure & its firing getting gas but wont run i pulled the fuel pump relay n it try to run i sprayed it with start fluid it hits but if i put...


If this truck has the 4.3L vortec motor it will not start with 40-45 PSI fuel Pressure.Thius engine requires approx. 56 PSI fuel pressure or it will not start. The fuel pump more than likely needs to be replaced this is a common problem with the 4.3L vortec engine.Change the fuel pump and your problems will be solved.

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well you narrowed it down to a fuel problem. not sure about your model, but most cars have a fuel pressure regulator on the fuel rail to reduce un needed pressures. that could possibly be bad. its cylinder in shape and has a vacuum hose connected to it. check the hose and that unit.

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well spraying a little starting fluid into the air intake and trying to start it will tell you if it is fuel related or and elctrical problem, i guess that would be the first step, and narrow things down a bit, if it starts with the fluid it is a fuel issue, if not its elctrical.
check you spark plugs, if your fuel pressure regulator was bad and it was flooding the engine, it would have fouled your plugs, i guess id start with those two things and at least start narrowing things down.

Good Luck, come on back if you get stuck....

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If you can keep spraying staring fluid and it stays running then the fuel pump is no pumping. only with a pressure gauge can you test it

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Put a fuel pressure guage on the test port on fuel rail. With fuel injected engines if pressure is too high or low car wont start.
Cycle key off to run (not start) you should hear the pump run a few seconds and stop.

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Do you have any of you fuel lines close to the exhaust? (vapor lock)

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