Where are the spark plugs on a Jeep Grand Cherokee?
Use a smaller extension to remove the 4th bolt in the back of the rail. All 4 bolts are identical in size and need not to be separated. With all 4 bolts removed, the rail should easily pull off the spark plugs. One electrical connector (located at the rear end of the coil rail) is used for all three coils.
How big should the spark plugs be on a jeep?
Take the torque wrench and your 5/8″ spark plug socket out. Torque each of the spark plugs down to 26-30 foot pounds. This is per Jeep factory specs, and I went ahead and set it to the average, 28ft/lbs. Put the spark coil rail back on, easing each rubber boot onto each plug.
When did the Jeep 4.0L ignition switch over?
Please note: This writeup is only for some year 2000 Jeeps with a 4.0L and all 2001 and later 4.0’s (it should apply to Cherokees, Grand Cherokees and Wranglers). This is due to a switch over in mid-year 2000 by Jeep from the old distributor based ignition system to a more modern (and cheaper to maintain) distributorless ignition system.
What should gap gauge be for spark plugs?
Get out the gap gauge, open the little box for each spark plug. Take the gap gauge and set each plug to .035 inches. If you’re using Champion Truck Plugs, they are preset to .035, but I check anyway just in case.
Where does the coil pack go on a Jeep Grand Cherokee?
The coil pack attaches directly to the spark plugs. Remove the four coil pack mounting bolts using a ratchet. Pry the coil pack away from the engine head. Grasp each end of the coil pack and work it back and forth until you can remove the coil pack boots from the spark plugs.
Can a bad coil pack cause a jeep to misfire?
by Dustin Thornton. The 2000 through 2004 Jeep Grand Cherokee L6 4.0L 6-cylinder engines employ a coil pack as part of the ignition system. A coil pack converts the energy from your 12-volt battery into the 35,000 plus volts needed to fire the spark plugs. A bad coil pack can cause the engine to misfire.
Why does my Jeep Grand Cherokee shake when I accelerate?
If your Jeep Grand Cherokee is shaking when accelerating, it’s something that should not be ignored. While the vibration can be annoying, it is often indicative of a serious problem. Vehicle speed matters when you feel a vibration. Different problems are going to show themselves when driving at different speeds.
Use a smaller extension to remove the 4th bolt in the back of the rail. All 4 bolts are identical in size and need not to be separated. With all 4 bolts removed, the rail should easily pull off the spark plugs. One electrical connector (located at the rear end of the coil rail) is used for all three coils.
The coil pack attaches directly to the spark plugs. Remove the four coil pack mounting bolts using a ratchet. Pry the coil pack away from the engine head. Grasp each end of the coil pack and work it back and forth until you can remove the coil pack boots from the spark plugs.
Please note: This writeup is only for some year 2000 Jeeps with a 4.0L and all 2001 and later 4.0’s (it should apply to Cherokees, Grand Cherokees and Wranglers). This is due to a switch over in mid-year 2000 by Jeep from the old distributor based ignition system to a more modern (and cheaper to maintain) distributorless ignition system.
If your Jeep Grand Cherokee is shaking when accelerating, it’s something that should not be ignored. While the vibration can be annoying, it is often indicative of a serious problem. Vehicle speed matters when you feel a vibration. Different problems are going to show themselves when driving at different speeds.
How do you tighten the spark plugs on a jeep?
Tighten the plug completely by turning it in a clockwise direction with the spark plug socket. If a torque wrench is available, tighten the plugs on the four-cylinder and inline-six models at 27-foot-pounds and the plugs in the V6 at 22-foot-pounds.
What happens when you mix up the spark plug wire?
Your car coughs and jerks down the road after an amateur spark plug change–chances are you mixed up the spark plug wires. The “firing order” of the spark plugs refers to the order in which the distributor sends electricity to the spark plug. If the spark plug works, it sparks when it receives electricity.
What should the gap be on spark plugs?
Measure the gap on the new spark plugs with the plug gap gauge and adjust if necessary. Check all of the new plugs at the same time. The proper plug gap is 0.035 inches on four-cylinder and inline-six models, and 0.045 inches on V6 models.
How much is a spark plug for a Jeep Grand Cherokee?
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Where can I get a spark plug replacement?
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How does a spark plug work in a car?
The spark plug takes high voltage electricity from the ignition coil and creates a spark at just right moment during the engine’s combustion cycle. This gives the engine the best mix of power, fuel economy and low emissions.
Can a worn spark plug cause engine damage?
Yes, but spark plugs that are worn enough to cause engine-misfiring have the potential to cause engine damage and overheating of the catalytic converter. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects.