Question about 1999 Buick Park Avenue

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94 Park Ave Ultra intermittent 'check engine soon light' comes on

Supercharged.. just chg'd the plugs. Check engine soon light comes on
and disappears after shutdown.. can go for days.. can come back on in minutes on a highway compute after shutdown. Two symtoms.. slight hesitation/chugging at low rpm in overdrive @ highway speeds.. 50 mph range.... and I note it seems to ride system is booting more often (slow leak..?). Dunno if the last item can give a code.
Buick dealership sez the computer can read a code... repair dude sez most often you need to bring it in with the light on.. ie.. "soft code".. Hence I've hesitated to spend the computer time $$. Buick dealer just went under.. the Buick dealership now I have low confidence in.
Appreciate any advice.. Thanks!

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  • mackland Apr 02, 2009

    1991 buick lesaber, same deal only the light is on for a minute goes out for a few and then back on again. No drop in performance and no pattern to light. (comes on at idle, cruzing at 70, during excel, braking - doesn't matter - just intermittant light at any time)

  • Anonymous Mar 27, 2014

    My 2008 Buick Allure is burning oil, we did check list for the last 4000 5000 km and every time they added about 0,5 l of oil. Very low milage only 57000 km. Have this problem almost from the begining , is there any chance I can fight with dealer to fix it under warratnty since they new about the problem?

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  • 71 Answers

It sounds like one of the ignition wires is breaking down or possibly a coil. Get a squirt bottle of water and spray a mist on the plug wires and coil to see if a spark starts to jump out. Probably just a bad plug wire.

Posted on Dec 11, 2008

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