Question about 2000 Buick LeSabre

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2000 Buick Lesabre runs like ****

It spits and sputters while driving usually around 47 to 52 mph. Before and after those mph's it's fine. Any suggestions?

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  • lornydune Nov 12, 2008

    why does my car's heater stop heating after 10-15 miles travel times & then it throws cold air?

  • Anonymous Nov 23, 2008

    Lornydune -



    bzgmtech nailed it. I have a 2000 Buick LeSabre with the 3.8v6 that did the exact same thing. I thought it was the early onset of a transmission problem. It was a worn out spark plug wire...had all the wires replaced for about $250 and all was fine after that.

  • sysanalyst Apr 13, 2009

    2000 Buick LeSabre runs poorly. 4000+ RPM the engine will cough and sputter, eventually the CEL lamp will come on. If I drive very conservatively, after a few days, the CEL lamp will go off. Coolant levels perfect, but when I removed the throttle body for cleaning, it was very badly caked in deep brown sludge. Oil is changed every 3000 miles with full synthetic. Plug wires are new. Transmission is serviced every 25K miles - fluid is bright red, smells new. Could cat be plugged?

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The reason for the heater problem is probably low on coolant. bypass pipes and plastic intake manifolds often leak coolant. ck coolant level first. is the "engine lite" on? if so, it needs to be scanned for a code to help you better. autozone will scan for free but wont clear it. if the engine is not low on coolant and engine is not running hot, suspect a poss. clogging heater core. could try to flush heater core first before replacing. ($$$).

Posted on Nov 15, 2008

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Sounds like a bad spark plug or spark plug wire arching out causing an engine misfire.

Posted on Nov 12, 2008

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