Changing spark plugs on a 2007 Chevy Uplander

2007 Chevy Uplander. When changing spark plugs and getting to the rear ones–do you remove the upper intake to get to them or just remove the coil pack and go by feel? What's the way to do it?
Experienced mechanics share their insights in answering this question :
Yes, I take out the pack and go by feel. Do it when it’s cold. Sometimes if they are really hard to get, I get them from the bottom. Jack it up and move the bottom to get to them. But you don’t have to take the manifold off. That’s a real pain and then you can get air leaks and all kinds of problems after doing that. If you don’t feel comfortable doing this yourself, contact a professional, such as one from YourMechanic, to replace your spark plugs for you.

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Notes: Gap 0.044″.
Replacing one coil might cure the misfire and codes for now, but the other coils could fall prey to the same failure and codes. Replacing all for the coils at a time will save a comeback. This is why some ignition coil manufacturers package coils in sets.
You can replace a failing ignition coil fairly easily at home, but remember that you`re dealing with high voltages so must disconnect your battery before you start.
You can replace one coil at a time or all at the same time. I would however recommend having all spark plugs replaced with the coils so you do not have to remove coils twice.
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
The gap setting is different for each vehicle but most are somewhere between 0.028″ and . 060″. Consult the owner`s manual or Champion ® catalog to find the recommended setting for the vehicle you`re working on.
Ignition coil packs are manufactured in such a way that they could last the lifetime of the vehicle, but due to failure in the proper maintenance of your car can cause them to fail earlier. Generally, they fail between 120,000 to 150,000 miles or between 5 to 7 years.
Whether it`s replacing the single coil mounted separate to the distributor, the HEI coil, a coil pack, or a coil over plug, we`ve proven on more than one occasion that coil upgrades do provide performance benefits including increased power you can see on the dyno.
Wear and tear is a common reason for ignition coils failing. It causes degrading of the insulation between the primary and secondary coil windings and the primary coil. The reduction in insulation can cause the coil to overheat.
Blue Streak – What`s Inside An Ignition Coil.

Less expensive ignition coils use resins that are less resistant to vibration, heat and endless heat cycles under the hood. Taking a risk on a cheap ignition coil from an unknown source can put an engine at risk.

3 coils is all that is required on these vehicles because of the coil and spark plug wire set-up.
A good quality, branded aftermarket ignition coil should last at least as long as the genuine part that was fitted to the vehicle at the factory. Yet, low-quality replacement coils are entering the market, especially online.
Ordinary copper and nickel spark plugs should be changed every 30,000 to 50,000 miles, unless otherwise suggested by the spark plug manufacturer. Platinum and iridium spark plugs tend to last longer than standard copper and nickel spark plugs. Expect to change them every 60,000 to 150,000 miles unless otherwise noted.
However, if the spark plug gap is too large, the spark is unlikely to consistently “jump” across the long distance between electrodes, thus leading to a rough-running engine or one that doesn`t run at all.
While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap.
As the spark plugs wear, the spark plug gaps widen, also weakening MPG. This is because the wider the spark plug gap, the more voltage is required to arch between the electrodes. The smoother the combustion process, the lower the demand for engine power and the lower the demand for fuel.
The larger the gap, the more voltage is needed to jump the gap. Most experienced tuners know that increasing the gap size increases the spark area exposed to the air-fuel mixture, which maximizes burn efficiency.
The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy and accelerated plug wear. It is always best to check the gap against the manufacturer`s specifications.
Ignition coils tend to fail because of bad spark plugs or plug wires. If your vehicle`s fuel-to-oxygen mixture is either rich or lean, therefore, your ignition coils may fail prematurely. Additionally, engine heat and vibrations can cause damage to ignition coils.
The ignition coil on car is supposed to last around 100,000 miles or more. You will have reduced gas mileage when coil begins to go bad and becomes less able to transfer power. Your car requires more fuel to run, this means you will spend more money on gas than normal.
Ignition coils tend to fail because of bad spark plugs or plug wires. If your vehicle`s fuel-to-oxygen mixture is either rich or lean, therefore, your ignition coils may fail prematurely. Additionally, engine heat and vibrations can cause damage to ignition coils.
Ignition coils tend to fail because of bad spark plugs or plug wires. If your vehicle`s fuel-to-oxygen mixture is either rich or lean, therefore, your ignition coils may fail prematurely. Additionally, engine heat and vibrations can cause damage to ignition coils.
You can typically get 80,000 miles on them before they need replacing. But if you notice any of these symptoms, it`s time to get your spark plugs checked out with an engine tune up. Continuing to drive on worn out or damaged spark plugs can ultimately cause engine damage, so don`t put it off.
since a faulty ignition coil causes a misfire, it will also cause the related spark plugs to foul. always replace the spark plug or plugs that the bad coil was firing. this will restore the power and fuel economy. some manufacturers recommend replacement of the ignition coils at scheduled intervals.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Spark plug chaos. Rubber stoppers are preventing the spark plugs from coming out.
ANSWER : Hi there. Try using a pair of small needle nose pliers to pull off the rubber boots from the spark plugs. As you pull, twist the rubber boots to break them free. If you cannot get the rubber boots off, then try using some mineral oil on the boots to aid them off, then clean off the oil with soap and water with degreaser. If you need further assistance with removing the boots from the spark plugs, then seek out a professional, such as one from Your Mechanic, to help you.

I have a dodge ram 1500 4.7- 2013 was changing spark plugs on top side with a 5mm socket socket is stuck help?
ANSWER : Hi there. Although what you are listing above is not necessarily a service we offer, it is possible to have one of our mobile mechanics come to your location to help you with this issue. To start, I would recommend setting up a spark plug removal service, then contacting the customer service sales professional that works with you to explain exactly what you need. When this has happened to me, I bite the bullet and purchase a new spark plug and new spark plug socket, as it’s very difficult to get it unstuck without damaging the socket.

Changing spark plugs on a 2007 Chevy Uplander
ANSWER : Yes, I take out the pack and go by feel. Do it when it’s cold. Sometimes if they are really hard to get, I get them from the bottom. Jack it up and move the bottom to get to them. But you don’t have to take the manifold off. That’s a real pain and then you can get air leaks and all kinds of problems after doing that. If you don’t feel comfortable doing this yourself, contact a professional, such as one from YourMechanic, to replace your spark plugs for you.

Engine will not stay started. I have replaced idle control valve map sensor spark plugs spark plug wires no check engine light is
ANSWER : You have a problem with the distributor assembly. I recommend replacing the distributor assembly. This will replace all the possible sensors and coil for the ignition and fix the problem you have.

Does anyone know the spark plug firing order for a 1992 Ford Ranger 3.0 V6? Changed out my spark plug wires, starts wants to die.
ANSWER : Hi there. Here is some info for you to review. 1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6 – 1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6.

After part replacements, spark plugs do not work – 1996 Lexus LX450
ANSWER : If you have a Check Engine Light on, first check for those codes to determine what engine management thinks is going on. If no trouble code, check the ignition fuse behind the driver side kick panel (carpeted panel at foot level on the left – for left-hand drive vehicles). If the engine is spinning quickly, and doesn’t appear to be meeting any resistance (as a motor with good compression would have), you may have a broken timing belt. If so – STOP, call a professional mechanic, like a certified technician from YourMechanic for help.

Car turn over won’t start have new battery starter and altinator and changed spark plug and spark plug wires and crankshaft sensor
ANSWER : Hi there. The first thing I would recommend would be to have a professional mechanic complete a digital scan of your ECU to see if there are any stored error codes that might pinpoint the source of your problem. However, one thing you might want to check yourself is the electrical harness connected to the crankshaft position sensor. In most cases, if this is diagnosed a being damaged, it’s actually the harness that is bad and needs to be replaced.

I have changed the camshaft position sensor, crankshaft position sensor, spark plugs and plug wires and there still is no fire.
ANSWER : Hi there. If there was a spark around the speed sensor as the engine was starting, then there is a major short in the ignition system. Check all of the wiring grounds and make sure that they all are hooked up and clean. If you are referring that the coils are sparking on the outside, then the coil has a crack on them and they would need replaced. I recommend seeking out a professional, such as one from Your Mechanic, to help you with your ignition system.