Question about 2000 Buick LeSabre

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Start but will not stay running

I can start my car but if i let up on the gas the car shuts off FUEL PUMP SEEMS TO BE WORKIN AND IM NOT SURE how long its been since the spark plugs have been changed taytrapp@yahoo.com

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  • 285 Answers

Try cleaning the throttle body,a build up of carbon collects behind the blade and restricts the air flow..sometimes too much for the computer to compensate for,just stop at yur locale parts store and get some cleaner and spray some on a rag,while holding the throttle open with the engine off,clean it with the rag soaked in cleaner,then take it for a ride around the block so the computer can relearn the settings for the air bypass solenoid

Posted on Sep 05, 2009

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Posted on Jan 02, 2017

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Have checked the fuel pump fuse how about the main relay. Have you tried checking and testing that? If you need instructions on how to test it let me know.

When you turn the key to access. II You hear the fuel pump run if you listen through the gas cap.

If the fuel pump is working I wouldnt assume it is a has problem yet.
I would start by checking spark make sure you are getting spark. Then make sure you are getting air. I would undo the intake pipe at the throttle body.

Once you done this let me know what happens.

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It Sounds Like A Fuel Supply Problem. Which Means It Might Be Your Fuel Pump. Check Your Fuse's And Battery Connections Before You Start Getting Into Dropping The Tank And Replacing It.. I Had A 94 mercury That Would Run In The Winter But Would Shut Off While Im Driving Down The Road In The Summer. When It Would Shut Off I'd Listen To My Car. Turn The Key On For 4 Seconds And Off for 2 and Have Someone Listening To The Gas Tank. The Pump Should Make A Constant Tone. If The Tone Changes up and down or if you hear grinding. theres your problem. a basic electric fuel pump for a car should turn on for 3-5 seconds and shut off when you turn the key on. NOT STARTING IT.

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