How to change the coil pack in your car.

Posted by Anonymous , 9/4/2007 Tags:changecoilpackcar

Story Highlights

Introduction When the check engine light is on and its reading misfired cylinders, but the spark

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Introduction

When the check engine light is on and its reading misfired cylinders, but the spark plugs are brand new, chances are its the coil pack that needs to be replaced.

Instructions

Difficulty: Moderately Easy

Things You'll Need

  • Socket wrench
  • New coil pack
  • Possible new tubes

Steps

1

Step One

Open and lift the hood of the car, and locate the coil pack. Chances are that the coil pack is located at the top area, just above the engine. The coil pack is kind of like a box shape type of part with, if its a four cylinder drive car, four tubes (two tubes connected on each side). If the car has six cylinders, then there should be six tubes, eight cylinders then there should be eight tubes.
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Step Two

The next part is to remove the coil pack. The coil pack will be bolted down with bolt screws, and with removing them, all you need is a socket wrench to unscrew the bolts out. Usually there will be four bolts, and each one will be in the corner of the coil pack.
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Step Three

On the side of the coil pack is a connecting wire. Disconnect the wire from the coil pack by (sometimes if it has it, unsnapping the safety snap first, then) unplugging the wire from the coil pack.
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Step Four

If its the coil pack that needs to be replaced and not the tubes, then unplug the tubes from the coil pack and skip STEP 5. In the picture, the tubes (two on each side) are a light grey, they are the ones that are needed to be pulled off from the sides of the coil pack. Then take out the coil pack. You can leave the tubes still connected to the spark plugs, in the cylinders.
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Step Five

If the tubes connected to the coil pack needed to be replaced, then just simply pull out the tubes, with a little force, from where the spark plugs are inserted, the cylinders. Insert the new tubes into the spark pugs, in the cylinders.
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Step Six

Place the new coil pack in by connecting the wire on the side first to make sure the wire plug fits in to the coil pack.
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Step Seven

After connecting the wire, place the coil pack into the right spot to bolt down. Using the socket wrench again, bolt down the bolt screws until all four sides are in place.
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Step Eight

Next is to connect the tubes to the coil pack, two on each side, and then you are all done. Turn on the car to see if its running, and if it is, you'll notice the sound of the engine is much smoother than before, and let it run for a couple of minutes and check to see if the check engine light will turn on, if it doesn't, then its good.

Overall Tips & Warnings

  • When buying a part for a car, make sure you have the exact information about the car, ie. the year, model, and make of the car, how many cylinders it has, and sometimes, how many doors it has. For example a 1995 Chevy Cavalier' s parts could be different from a '94 or '96 Cavalier' s by shape and or size. It's that important.
  • Make sure before you work on a car, that the car is completely cooled off if it was running earlier. It does get hot under the hood and chances are you will get burned if not too careful. You can use a very thick blanket to put over the engine area to protect yourself from burns if you like.
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