Question about 2000 Buick LeSabre

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My buick will not start. if i hold down the gas pedel it will the start but if i let it up the car will die. what might be wrong?

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One or both of your coil packs are likely faulty and not all cylinders are getting spark.

A plugged fuel filter may also cause this. As well as bad fuel pump. I would first check to make sure that you are getting spark to all cylinders first. You can remove one plug at a time and lay on engine block, have someone else turn motor over while you watch to see if every plug is getting spark. Do one plug at a time. If one or two plugs aren't sparking, than coil pack is bad, If not spark, then crankshaft position sensor is faulty.

If spark is good, check for fuel pressure at fuel rail. there is a test valve on the rail. If pressure is low, then filter could be plugged, or your fuel pressure regulator is faulty. You can test power to it with a voltmeter. Or test unit itself with an ohmmeter.

You can go to autozone.com and register for full free online repair manual.

Posted on Sep 23, 2009

  • Mrs Featherbottom Apr 02, 2014

    ok, lets think about this- the car will start, but you need to hold gas to keep the car running. This tells us that you have spark, or the car wouldnt start. you have compression, or the car wouldnt turn over. You may not be receiving enough air- thus having to increase air flow into motor, or you may not be receieving enough fuel- again, because you have to hold down the gas.

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