No spark from plugs or coil,

Here is a diagram showing the spark plug leads attached to a coil pack:

Ignition coil
Spark plug lead
Spark plug
In this diagram, the ignition coil is at the center and is connected to the spark plug leads, which are in turn connected to the spark plugs. The spark plugs are located at the end of each spark plug lead and are responsible for igniting the fuel in the engine's cylinders.

In a typical engine, there will be one ignition coil for each cylinder, and the spark plugs will be connected to the ignition coils through the spark plug leads. The ignition coil generates a high voltage electrical current, which is transmitted through the spark plug leads to the spark plugs. The spark plugs then use this electrical current to create a spark, which ignites the fuel in the engine's cylinders and powers the vehicle.

Hi Jason, Sounds like you have a coil pack and one of your coils is faulty. To check which coil is faulty just pull a spark plug lead off a spark plug and plug the spark plug lead onto a SPARE spark plug, Now earth it to the CLEAN motor or body (make sure the spark plug is touching metal) Start the motor, it's going to run ROUGHER than usual but you'll see if that spark plug is sparking... If it sparks then that coil is good. Turn the motor off and replace the spark plug lead back on to the original spark plug. Repeat with the next spark plug lead and so on until you start your car and the spark plug doesn't spark, THAT'S YOUR FAULTY COIL...

3.7L Engines
Each individual spark plug is located under each ignition coil. Each individual ignition coil must be removed to gain access to each spark plug. Refer to Ignition Coil Removal/Installation. Prior to removing spark plug, spray compressed air around base of ignition coil at cylinder head. This will help prevent foreign material from entering combustion chamber.

1. Remove spark plug from cylinder head using a quality socket with a rubber or foam insert.
2. Inspect spark plug condition.

To install:

1. Start the spark plug into the cylinder head by hand to avoid cross threading.
2. Before installing coil(s), check condition of coil o-ring and replace as necessary. To aid in coil installation, apply silicone to coil o-ring.
3. Tighten spark plugs to 27 Nm (20 ft. lbs.) torque.
4. Install ignition coil(s). Refer to Ignition Coil Removal/Installation.

Trouble Code: P0302

Cylinder 2 Misfire Detected

Possible Causes:


Air leak in the intake manifold, or in the EGR or PCV systemBase engine mechanical fault that affects only Cylinder 2Fuel delivery component fault that affects only Cylinder 2 (i.e., a contaminated, dirty or sticking fuel injector)Ignition system problem (coil or plug) that affects Cylinder 2

I got code PO 305 on a 2002 Mercury Grand Marquis, what is the spark plug wire part called
This will have a direct coil over ignition with a coil over each spark plug. The coil is the electrical part over the spark plug. The coil also has a rubber part that is called the boot or spark plug boot. The boots can be purchased separately but the coils will come with new boots.

is it #5 coil,

Have you checked to see if there is any spark coming out of the number 5 coil?



and should I replace the coil and spark plug and what should the spark plug be gapped at?

When was the last time the spark plugs where changed? It may be due for all the spark plugs to be changed. The spark plug gap is usually listed on the emissions sticker under the hood. It should be .050 - .056 or very close to that.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

REMOVE TOP ENGINE COVER,REMOVE CYLNDER HEAD CENTER COVER,YOUR WILL SEE IGNITION COILS SETS ON TOP OF SPARK PLUGS.ALL 4 SPARK PLUGS EACH, WILL HAVE A IGNITION COIL ON TOP OF THEM.REMOVE THE COIL SCREW THEN UNPLUG THE COIL ELECTRICAL CONNECTOR.REMOVE COIL, THEN YOU CAN REMOVE SPARK PLUG.YOU WILL NEED A LONG EXTENSION AND A LONG SPARK PLUG SOCKET TO REMOVE SPARK PLUG.

YOU HAVE TO REMOVE COIL PACK WITH PLUG BOOTS ATTACH TO COIL ASSEMBLY FROM TOP OF VALVE COVER.YOU HAVE 4 SCREWS ON CENTER TOP VALVE HOLDING COIL PLUG BOOTS ASSEMBLY IN PLACE. ONCE YOU REMOVE COIL PACK ASSEMBLY WITH PLUG BOOTS.THE SPARK PLUGS UNDER THE COIL ASSEMBLY.YOU CAN REMOVE SPARK PLUGS.FROM TOP VALVE COVER WHERE YOUR COIL PACK COME OUT.YOU NEED DEEP 6" INCH SPARK PLUG SOCKET AND EXTENSION TO LOOSEN AND REMOVE SPARK PLUGS. YOU NEED SPARK PLUG GAP GAUGE.YOU NEED TORQUE WRENCH.NOT MANDATORY LONG AS YOU DONT OVER TIGHTEN SPARK PLUGS.STRIP THREADS.IN HEADS

I am writing you the method on how to change sparkplugs, you may now have an idea where spark plug is loacted.

The Ford Expedition uses eight spark plugs to accommodateits eight-cylinder engine. Replacing the spark plugs every 75,000 miles is animportant part of overall vehicle maintenance. 1. Disconnectthe negative (black) battery cable from the battery terminal. Remove thewiring harnesses from the spark plug coils. There will be four on each side ofthe engine block, which you can remove by simply pulling them out of the sparkplug coils. 2. Unscrew the 7mm bolt from each of the spark plug coils usinga socket wrench and 7mm socket. 3. Pull each spark plug coil out of the engine block. Pull themout slowly, being careful not to damage or tear the coils. 4. Use a socket wrench and spark plug socket to unscrew eachspark plug from the engine block. Once you remove these, discard them. 5. Place the new spark plugs into the engine block and tightenthem using the socket wrench and spark plug socket. 6. Slide the spark plug coils back into the engine block. 7. Bolt the spark plug coils back into place using a socketwrench and 7mm socket. 8. Reattachthe wiring harnesses to the spark plug coils. 9 . Connect the negative battery cable to the negative batteryterminal.

Hi,
REMOVAL
Always remove the ignition coil assembly by grasping at the spark plug boot, turning the assembly 1/2 turn and pulling straight back in a steady motion.

• Prior to removing the spark plug, spray compressed air around the coil area and spark plug.
• Remove electrical connector from ignition coil.

On 3.5L engines, it is necessary to loosen the screws by alternating back and forth. Do not lose the spacers under the coil when loosening the screws.

• Remove 2 fasteners from ignition coil.
• Remove ignition coil assembly.
• Remove the spark plug using a quality socket with a rubber or foam insert.
• Inspect the spark plug condition.

INSTALLATION
Always remove the ignition coil assembly by grasping at the spark plug boot, turning the assembly 1/2 turn and pulling straight back in a steady motion.

• To avoid cross threading, start the spark plug into the cylinder head by hand.
• 3.5L engines tighten spark plugs to 28 N·m (20 ft. lbs.) torque, 2.7L engine tighten spark plugs to 17.6 N·m (13 ft. lbs.).
• Install ignition coil assembly onto spark plug.
• Install coil screws and tighten: 2.7L engine to 6.2 N·m (55 in. lbs.), 3.5L engines to 6.7 N·m (60 in. lbs.).
• Connect the electrical connector.

If it's the four cyl., the first coil pack bolts over the #2 spark plug. The #2 coil pack wire plugs into #3 spark plug. The number two coil pack bolts directly over the number four spark plug, and the #2 coil pack wire plugs into the #4 plug. The firing order is 1-4-2-3.