Question about Pontiac Firebird

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The middle coil pack on my 99 firebird v6 is not firing what could cause this? we replaced the ignition moduel and it is still not firing?

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  • stephine_f_7 Aug 06, 2010

    we replaced the coil pack and plugs and wires still not firing

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  • Master
  • 784 Answers

Need to replace the coil pack. If there is a problem with the ignition module, then other coil pack would not work.

Posted on Aug 06, 2010

  • 1 more comment 
  • stephine_f_7 Aug 06, 2010

    we replaced the coil pack already still will not fire

  • stephine_f_7 Aug 06, 2010

    we replaced all spark plugs and spark plug wires its 2 and 5 that not firing

  • Linh Thanh Aug 14, 2010

    There is a way to check to determine if there is a coil pack or the ignition module. It is not necessary new parts are not defective.
    The back of the coil pack terminals are called the primary inputs. The other side where you connected to the spark plugs are secondary outputs. If you make a connection to the corresponding of the working input ( 1, 3, 4,6) to check the respective out put of 2 and 5 then we can conclude:
    1-The connection you made s at low voltage so you don't have to worry about arcing. If there is a spark at spark plug at 2 and/or 5 once you make a connection at working coil pack input, then the coil pack is good for 2 and 5, but not the ignition module.
    2- Since you know the working input, that is why you have sparks at 1,3,4,6, now it is not producing sparks at output 2 and 5 then the ignition module is bad.
    Hope this can help.

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