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If its an old car. You simply unplug it, one main wire on top that goes to a distributor and a positive and negative wire on the sides. If its a newer car you may have coil packs. One on each spark plug. Year and make would be helpful.
Easiest way is if you have another working coil pack and switch it out with the suspected faulty coil pack. Say you have a problem that is with the coil pack that covers the 1-3 switch it with the one that covers 2-4. If the problem does not switch to where you put the faulty coil pack... it's not the coil pack. Replacement coil packs can be found at an auto part store or if you need a cheap replacement you can usually find one at a junkyard.
Buick Park Avenue has Type I coil packs, three twin tower ignition coils are combined into a single coil pack unit, and Type II coil packs, the coils can be replaced separately and the ignition wires are all on the same side of the coil pack.
If there's no spark then the problem will be on the coil pack. If the coil pack is faulty there will be no current to the plugs. The coil pack will surely need replacement. The coil pack is located on the side of the engine, you will need to take the cap off where the plug wires are connected. Once the cap is removed, remove the coil pack inside the engine and replace it with a new one.
After the replacement you'll be good. Hope this helps and thank you for using FixYa! Have a good one!
You can by a new Coil pack from Auto Zone for less then the dealer's cost and Auto Zone can give you the step by step instructions for you to replace the coil pack free of charge and will take about 1 hour if your good with common tools. Auto Zone also can scan your car for DTC codes Free of charge to ensure that it's the coil pack. The other common problem that will also seam like a bad coil pack is a bad ignition module which is what I am leaning towards since it's three of the cylinders you mentioned, most of the time it's just one of the two coils that will go bad which would only make two of the cylinders go dead. Check the wires to the electronic module first and then the switch the coils and see if the same two cylinders are still dead, if the same cylinders are still dead. Good chance that it's going to be the module and if the other two cylinders go dead and the dead ones come alive then it's going to be the coil pack. Good luck and here is a you-tube link to the ignition module and coil pack replacement procedure. keep me posted, be glad to know you got your car running 100% again . http://www.youtube.com/watch?v=8XgHM1i5jK8
First off, on this model you don't have plug wires, you have coil packs with a boot and coil connected to the pack. The boot slides on the tops of the spark plug. The good thing about this is that you don't have to mark each wire to its location.
So to replace the plugs you need to disconnect the electrical connector to the coil pack and then unbolt the two bolts that mount the pack down, then remove the pack.
Next with a ratchet, an extension and a special spark plug socket, which has an insulator inside to protect the porcelain from getting cracked, remove the spark plugs.
Next step is to replace the plug, usually I slide off the boot from the coil pack and then remove the coil from inside the boot and slide the boot over the spark plug and start to thread the plug back in. Using this method allows to you feel if you are threading the plug in right. Then with a torque wrench you would torque the spark plug to the specs for the type of engine you have.
Next reinstall the coil pack with the two mounting bolts, it is only necessary to hand tigthen the two bolts. Then plug back in the electrical connector and continue this process on the next 5 spark plugs.
__________________ Changing Dome Light
To remove the map light bulbs you need to first remove the overhead console.
To do this you need to remove the screw at the front of the overhead console (which is more towards the front windshield).
Next you need to pry down on the rear of the overhead console and then disconnect the electrical connectors.
Then, with the overhead console pulled down, pull of the map light bulbholders and replace the bulbs.
Installation is the reverse of the removal process.