Question about 1999 Buick LeSabre

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99 lesabre wont start

Ok iv got a 99 lesabre that has the 3600 series engine and it wont start i got a code read at advance and the code came out that there is a multiple cylider misfir, so i replaced the spark plugs and the wires but that didnt work so i checked the fuel pressure and that is good i checked to make sure that my new plugs were getting power and im getting spark to my plags, i also checked my injector wires to make sure that the computer was telling my injectors to fire and thats good , so to check and make sure my timing isnt off i checked for a suction in the intake and its sucking air. i dont know where to go from here and the mechanic i talked to over the phone that i know is kinda stumped any information would be helpful

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  • jeeps4life06 Feb 16, 2009

    i tried all new coils and it doesnt work i know that the engine is gettin spark cause when i spray starin fluid in the intake it blows out a fireball but wont crank off the start fluid

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I would get me a hayes repair manual for my car and you can do it i am going to give you an idea if there is a auto zone near you they will print the diagiam for free an at the same time get a price for the intake gasket also here a place that sells only GM-parts schram auto & truck parts #1-800-292-1032

Posted on Feb 11, 2009

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Multiple misfire indicates that spark is going elsewhere or to multiple locations... Likely you have coil packs on your engine (don't have any real info right in front of me) but coil packs (and sometimes brackets along with them) can give you similar problems, No coil packs, change dist cap & rotor!

Posted on Feb 11, 2009

  • Richard Scordino Feb 16, 2009

    "fireball from intake tells me that it's firing before intake valves are closed... check cam sensor. Also, make sure timing chain or belt is still good and has not thrown cam/crank phasing out of sync!! If it is, valves will close late!!

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