Where is coil pack

Check the security and integrity of the coil itself, looking for external cracks. On most cars with multiple coil packs, you can swap the coil on the misfiring cylinder for a different, good one.

If the coil is bad the misfire code should now move to the other cylinder. Coil packs are not inexpensive, but the good news is that they typically are easy to change for the DIY mechanic. Once you locate the coil or coil packs, which will be fairly easy once you remove the engine cover, there is usually just one screw or a small bolt holding it down.

Remove the bolt, pull the coil and it will pop off. Go to front page. Search results Search Haynes. Year Year Make Make. Model Model. What is an ignition coil? Why does an engine need one? What does the coil look like? Where is the coil? How does the coil work? Why does a coil fail? Weaken windings inside a coil eventually break, creating resistance for the spark going through them.

Unfortunately, you cannot replace the windings, but you can replace the faulty coil, or coil pack. Open the hood and locate the coil pack near the engine of your car. The easiest way is to follow any of the spark plug wires. One end of the wire is connected to the spark plug; the other plugs into the coil pack. The coil may be to the left of the engine compartment, or to the backside of the engine. Remove the air cleaner assembly from the top of the engine to gain access to the coil pack, if necessary.

Use a wrench or standard screwdriver. Raise the front of your vehicle using a floor jack, and support it on 2 jack stands, if the coil pack on your car is on the backside of the engine. You will need to work from underneath the vehicle to remove it. However, the primary cause of coil failure is voltage overload caused by worn spark plugs with electrode gaps that are outside specified limits or by damaged cabling and wires. Engine misfires and backfires, poor starting, a lack of performance and poor fuel consumption are all possible indications of a faulty coil.

If your car was built after , it may have an engine management system that generates a fault code for any misfires detected. This code could help identify the component that caused the misfire.

Of course, a misfire can be caused by all manner of ignition and fuel supply problems, not just a faulty coil. For this reason, you should remove and check the spark plug, and, if there is a distributor, the HT lead. Check the security and integrity of the coil itself. Replacement is the only realistic option. Go to front page. A simple guide to your car's ignition coil You are here Home A simple guide to your car's ignition coil. What is a coil?

Why does an engine need one? As the mechanical distributor was replaced with electronically controlled signals, spark was passed through a single coil. In most 4-cylinder engines today, a wasted spark ignition system sends a spark to opposing cylinders on intake and exhaust strokes simultaneously.

One cylinder is at top dead center and fires on the power stroke while the cylinder on the exhaust stroke allows burned combustion gases to escape out the exhaust. V6 and V8 engines firing on opposite banks generally use a coil pack with normal looking ignition wires. Generally speaking, coil packs produce better horsepower for today's high-performance engines.