2004-2008 Grand Prix - Change Ignition Coil Packs
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- เผยแพร่เมื่อ 27 ก.ย. 2016
- The coil packs on your Grand Prix is giving issues, and you need to change them. This video will help you get it done.
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Disclaimer
I assume no liability for property or vehicular damage or injury incurred as a result of any of the information contained in this video. I recommend safe practices when working with any and all tools, including but not limited to electrical tools, power tools, pneumatic tools, any lifting apparatus, including jacks, jack stands, and automotive lifts, manual tools, chemicals, lubricants, and any other instruments used within the video. Due to factors beyond my control, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of all above mentioned tools or equipment, or any other items mentioned above, and all information contained in this video is the sole responsibility of the user and not myself or Nexus Auto. Caution is advised and any practices by the viewer is at user discretion. Any tool or part recommendations or links are given for informational purposes only and it should be assumed to be bought at your own risk. I or Nexus Auto assumes no liability for any damages, premature part failures, or incorrect parts made from purchases made online, including but not limited to tools, parts, instruments, jacks, chemicals, lubricants, etc. - ยานยนต์และพาหนะ
hey I thought this was awesome. thsnks for making easy and to the point. I'm a chick and I'm getting out there to fix my car! next one I need to watch is plugs and wires. here I go. Thanks a lot
no problem. thanks for watching! Glad it helped out
Great video. Always enjoy them. The Ignition Coils are mounted right at the top so its super easy.
I was on the highway near my home and my car started stalling. It was about to shut off at a red light so i shifted it to neutral and gave it some gas to prevent it from stalling. Thankfully i made it home! The engine was extremely hot but at the same time the radiator fan wasn't turning on. The car kept misfiring and the tailpipe exhaust smelt like unburnt gasoline. And the check engine light came on - P0300 - random misfires. After 2 days of diagnosis such as spark plugs, spark plug wires, ignition coils, cleaning the electronic throttle body: the issue turned out to be the ICM (ignition control module or also called distributor) that is mounted right below the ignition coil packs. It's the most odd issue that car has ever given me and took me two days to figure out.
I was just adding this comment here so that if anyone else comes across similar symptoms, don't rule out the ICM. The junkyard sold me one for $30 that fixed up the issue! Diagnosing random misfires is sooooo hard! Check this out if anyone else comes across the issue: easyautodiagnostics.com/gm/3.8L/ignition-module-and-crank-sensor-test-1
Thanks for the great feedback and for sharing your experience. No doubt, it will be extremely helpful for others in this situation. Nothing should be left off the table when troubleshooting, and the time you took the find the issue will no doubt help others. Thanks for watching and sharing!
THIS IS MY CURRENT PROBLEM! THANK YOU😭🙏
Perfect video. Thank you.
Awesome, glad to hear the video helped!
Dielectric grease is an electrical insulator and does not conduct electricity. So it will not help promote a good electrical connection. Applying a glob a grease directly where you trying to make a specific connection from the ignition control module to the ignition coil pack is not a good idea. IF your where to put it anywhere at all on this project it would be lightly coating the orange insulator and also slightly inside your spark plug wire boot, but not touching the metal inside it. I would not be surprised at all if your car misfired occasionally from the amount of grease you applied here because the connection can't conduct good electrical flow. Not trying to troll you, just trying to help you from further issues down the road, I'm a GP owner myself.
Hi Larr, Thanks for watching and writing in. I definitely don't think you're trolling...that's more of those dumb comments that add no value to anything, and luckily, I do not get many of those! :)I appreciate you writing in and putting up some advice. Advice is always good...no one can know everything and I am always learning something new. I would like to address it. I do not want to post this across all 3 videos, so I will just post this on this one. The information you are posting is exactly right. Dielectric grease is an insulator and not a conductor, but through insulation, it creates better conductivity with the connected parts. Maybe I should have directly clarified that, but I did not directly indicate that it was for conductivity either. I stand by what I did in the videos. It is what I have done for years and there has not been an issue. No misfires, knocking, etc. In my early years, waaay before TH-cam, I had a 2 different mechanics question the logic of applying directly to the coil openings, as this was a standard 12 volt connection, but I always applied the logic that since only a very small amount ever enters the thin coil connector opening, it would not be an issue, and it hasn't. Mainly, it would just insulate around the base of the connections, and it has worked out so far. Some other mechanics(at the time) agreed with this. However, no mechanic has ever questioned the logic of applying it directly into the boot of the wires(well, to me, anyways) as I had done in this video, as the high voltage outputs (approx 30k, give or take the car)can easily overcome any impedance that the dielectric provided. That said, as mentioned above, you are not wrong and that is great info, and there would be nothing wrong with doing it the way you described. In fact, for those watching, I would recommend either-or, but yours would be a safe bet for those unsure of how much dielectric to apply and a much more proper way to apply the grease. As I type this, I realize it may be good to post this to the other videos, so I will do that. To sum up to other watchers, the method mentioned by Larr is sound in the sense that you can apply a dab around the orange insulators or in the ignition wire boot along the inner walls. This would be a great way to apply the dielectric grease while performing this job. Thanks for watching and advice.
Nexus Auto I was changing my coil packs today and I’m doing a tune up first time doing it myself and I only have 3 screws for my coil packs , where can I get some more screws from? Do you know? I looked online and auto zones website they have a pack of hardware that’s full of bolts and nuts and screws but I don’t know if any will fit. I’m gonna go up there tomorrow when they open to see.
I have no spark coming from #2 when I do the single boot removal test one at a time do you think that would be causing my misfire problem when driving causing it to stall but able to restart it but then try to drive it again but it misfires and dies again pls any help will do
It could be. I would say, as a quick test, it to swap 2 of the coils, and recheck and see if the misfire stays on cylinder 2, or moves to a different cylinder. will tell you if the coil is the issue, or if it is something else.
Also, for the car dying, I would always recommend doing a throttle body cleaning first. It is very common for a dirty TB to cause many issues with the car, so if you have not done that yet, I would recommend that first. It may not fix the issue, but it should improve the car, regardless.
Hey I see your still pretty active here so I hope you’re still checking comments. I had an issue where my car would shake got much worse when put in anything other than park. Getting error “misfire on multiple cylinders” changed the wires, plugs, and coils but to no avail. Got a jumping off point or something else to look at? Thanks
Hmm, so if you only got the P0300 and no other codes, there could be another issue common issue. There is a lot of causes for misfire, from a fuel issue, to engine damage, to ignition, to sensors. If possible, the best thing to do is run the car through a scanner and see if there is fuel trim issues, throttle issues, etc. But if that is not possible, and If there is no other accompanying P03xx code, then I would be looking at the maybe the ignition control module, cam sensor or crank sensor. I am not saying that they are for sure the issue, but for example, a fuel injector will affect only one cylinder. But there 3 are more common failures, and they affect multiple cylinders. If these check out, then maybe the fuel system (injectors, pump, etc) and if that is ok, then it may be something more severe, like engine compression.
Have a 2005 Grand Prix that cut out on me suddenly. It would crank but wouldn’t start. Replaced the crank sensor and it started and ran for two days. Then the battery dies. Replaced the battery and now it will crank but will not start again.
Any thoughts?
Hmmm. Really hard to say without being there. Sounds like some sort of electrical issue though. If it were me, the first I would do is get my hands on a scan tool and check for any codes or anything out of range. Otherwise, hard to say. Check the connectors for the battery and the crank sensor is another place to start
Any advice on figuring out the order of the wires? I had someone work on my ignition control module and didn’t label the wires. I am at a loss!
No worries at all. I made a video a little while ago that shows where the wires go from the coils to the spark plugs. Hope it helps.
th-cam.com/video/2OLKssHiyLU/w-d-xo.html
Nexus Auto Thank you SO much 🙏
@@dejasworld5975 no problem at all!
How do you know if the coil packs are going out? I have 226,000 on my base mode 2005 grand prix. I've never changed the coil packs yet. I changed spark plugs with NGK Iridium IX 40,000 miles ago.
You will get misfires in the ignition, as if the car is stuttering or running really rough. It can surge too (like you described in the other comment) but it is more likely to misfire.
@@NexusAuto will it vibrate and shake wen starting Nd not starting the only way is to push the pedal to start
@@NawfbabyGaming It can definitely cause the issues you are having. A more common problem for these cars are the throttle body. They tend to get really dirty and can cause your issues too. I can't say that is the cause for sure, but I would recommend cleaning the throttle body before going after the coil packs.
Is this the same change for a 2004 Gran Am? Thanks for your help!
Not really, unfortunately. If you have a 4 cylinder Grand Am, the coil pack is completely different. If you have a V6, it is sort of similar, but the coils are located near the top/back of the engine. The wiring and firing order may be different...Haven't checked myself
@@NexusAuto I did find them at the back. A little harder to get to.Thankyou for your response!
I have a 05 Grand Prix GT 3.8l that starting to misfire after a bad storm , the positive terminal connector was in pretty bad shape so I went ahead and had a mechanic swap them both out to the standard connectors. After a few days the misfire became more apparent when I turn OFF the AC , stalled out a few times here and there but after 15 to 20 minutes of running in general the misfire doesn't really show and maintains a 13.8- 14.2 V when at higher speeds .
The car is at around 208800 miles and I think it's been about 2 years since I got a tune up
I'm going to get a computer test soon but would it be a little too much just to get new coils and plugs ?
Car also starts up just fine which as well
The computer test is definitely a good idea to start off.
A cold start misfire could be a few things, like the plugs and coils as you mentioned, to a bad spark plug wire, misreading from the MAF, or poor fuel pump pressure (amongst other things).
Especially if you're running original spark plugs and coils, you would be due to change them anyways. So wouldn't hurt to change them. And they are a common problem with misfires. But a good scan will tell you a lot. Which cylinder is misfiring, how many cycles does it misfire, etc. Don't get a ODB II code scan, get a full scan done.
@@NexusAuto as of now I have gotten two codes
P0107 : MAP sensor is lower than normal parameters.
And
P0108 : Manifold Absolute Pressure (MAP) sensor / Barometric pressure (BARO) sensor circuit high input
@ThaProd1gy ok, that is a good sign (having a code is better than no codes at all when there is a issue lol). A bad/faulty MAP could definitely cause the issues you're having. Doing the plugs and coils is a good idea, but I would start with the MAP for sure.
i messed up i replaced all the wires on my 04 what the numbers for the frount 135 and back 246? when i pull 2 of coil pack no spark at all
Hello. Sorry, I was away. Do you still need assistance with the plug/coil layout?
@@NexusAuto yes
@@rickcarp5453 ok. I will put a video out tomorrow to show it, but I will put it like this right now.
For the coils, the numbers will go from top to bottom, so the top coil pack is 1, 2, middle 3, 4, and bottom 5, 6.
For the cylinders, assuming you are looking the engine from the front of the vehicle, you have Rear 1 (which is passenger side, under the alternator), rear 2, and rear 3 (driver side). Same for the front. Front 1 is closest to the coils, Front 2, and Front 3, which is closest to the air box.
The layout is as follows
Coil pack 1 (upper most coil)
Coil 1 - Rear 3 (driver side rear)
Coil 2 - Front 2 (middle front)
Coil Pack 2
Coil 3 - Rear 1 (rear, under alternator)
coil 4 - Front 3 (near air box, front)
Coil pack 3
Coil 5 - Rear 2 (rear middle)
Coil 6 - Front 1 (front, near coil pack)
Hope that helps, if you need a visual, the video should be up by tomorrow evening the latest.
@@rickcarp5453 th-cam.com/video/2OLKssHiyLU/w-d-xo.html
what size socket do you need for unscrewing the coils?
7/32 bit or socket will work
@@NexusAuto I can’t find this bit at any auto shop, does any other size work?
@@305tyrone4 You may be able to get by with a 6mm metric. It is not snug, but it is the closest equivalent size.
It's Metric, 5.5mm is the correct size
@@whwilson3708 It is true, which is the same as 7/32. what is weird is I don't see a lot of tool kits with a 5.5mm, but they do have 7/32 and 6mm, which is why I suggested it. But 5.5mm is correct for sure.
Will the car not start if coils are bad?
Anything is possible for sure, but typically, the car should start, but rough really rough...like it is struggling to keep up. And it still have significant vibration. Best not to let it run too long with a bad coil. If it is seriously messed up, it may cause starting issues, but that is more rare, at least on these cars.
what kind would you recommend buying?
Honestly, just going with the stock AC Delco ones. I have looked at other ones, like Accel, and they work well, but have a high failure rate. The AC Delco ones have a pretty good life and low failure rate, so I would stick to those coils
Can your car stall with bad coils and no tune up
Yes, you can. They would have to be really bad, but definitely possible.
Do i need new colis my car wont stay started keeps dying
It could be the coils, but that is by far not the only cause of a car shutting off. There is many causes, so it's hard to say what the cause is.
Before anything else, I recommend getting your throttle body cleaned. It is one of the most common causes of a car shutting off. If that doesn't work, the car would need to be diagnosed
Is the grease NEEDED??
It's not. It helps create a good seal for moisture protection and can help if you need to remove the plug in the future, but you don't have to use it at all. In fact, I haven't used any on any modern cars with built in coils (instead of this car, will separate coil packs) and no issues so far
I replaced one coil on a 2006 Pontiac grand prix the engine will turn but not cutch the coil got warm trying to crank up the car what is that mean
Did all 3 coils get warm, or only the new one?
No just the New one
Hmm. It could be a couple of things. Try swapping 2 coils around. If the new coil warms up at its new position, then the problem is likely in the new coil. If the old coil now warms up, then something else related to that coil is the issue. (ie spark plugs, wires, the board that the coils sit on). It may seem obvious, but just to make sure I say it, make sure to hook up the spark plug wires the right way when you swap the coils. Let me know if you have any questions or how this works out
Nexus Auto how can a new coil go bad that quick
In the years i've been doing this, I have come across many defective parts right out of the box, even right from the dealer. It happens. Manufacturing errors, damage in transit, exposure to moisture...it has happened for sure. But it's not likely. I only proposed the test to eliminate it from the equation. It would suck to pull apart the car looking for an issue, only to find the issue was a defective new coil all along. Unfortunately, I have seen this happen. Again, don't think it's defective, but it would help narrow down the issue.
this is a good video but I'm at a lost with my prix I have an 04 gtp super charge and it turns on but doesnt accelerate had trans checked and looks fine replaced the throttle body maybe this is next
Does it come up with any errors? Like 'reduced engine power' may show up. Anything like that on the DIC?
@@NexusAuto it does it gives code p068 and p0420 twice but I had the sensor fixed to pass emissions and it started again
@@nettinetti5370 Ok sounds good. So if I understand correctly, since fixing the sensor, it has started up ok? If so, what was the sensor you changed?
Wires or injectors or even a gas leak on the fuel rail
@@joseLopez-uw6vn not fuel leak had that checked injectors are next to be checked the sensor replaced was just written as 02 upper and lower from the mechanic so I'm not sure which ones he did
If you had a misfire in only number six do you have to change all three coils? Also do you need the greece?
Nope. Assuming the coil is the issue, you would only need to change the one coil, not all 3. Also, you don't need the grease..it is does help with insulating the connectors from moisture, but you can get by without it. I do find that sometimes, when I buy the coils, they will come with a little tube of grease, but this is not always the case.
Nexus Auto I replaced the 1 coil and it works amazing for that one day. When I was driving home I noticed that my radiator fan was not working. I checked the fuses and they were all okay. Later last night the car shut off when I was driving it. Today my mechanic install a crankshaft sensor but it still is not getting fire to the ignition coils. I don't know what to do. A new code came up about the PCM. Do I have to reset the modular for it tp crank
Whoa! You are getting some serious issues with the car. Weird (although not unheard of) to have so many things happening. What code did you get in the PCM? Was the car overheating when the rad fan wouldn't turn on, or was it showing cool on the dash cluster? And what do you mean by not getting fire to the coils? I know you mean you are getting a misfire, but is the misfire in just one cylinder still, or are multiple cylinders mirfiring?
Nexus Auto no the car was not overheating when the fan didn't turn on it just stopped. Today I replaced the crankshaft sensor and it still won't crank. My mechanic came by and noticed that there is no power in the fuse. He also noticed that the coils are not getting no power/spark. Lord where do I start..... :( how do I know if the PCM or ECM is bad
To truly see if the PCM is bad, someone needs special equipment to hook up to the PCM and run specialty software to run a stress test. However, most of this is not readily available to us, and you either have to get a cheap knock off and hope for the best, or invest some serious money into getting the equipment, which is very expensive. Worse still, some shops that still have the equipment STILL cannot diagnose a PCM properly. You can check to see if it is getting power and such with a voltmeter, but this wouldn't account for software corruption or internal failure issues. To me, and this is just my opinion and not an official diagnosis, all the things failing are ONLY related via the PCM, which is in the airbox. I wouldn't say to use my recommendation as your diagnosis, but to my knowledge nothing else connects the rad fan, crankshaft sensor and ignition. You could possibly have 3 separate major issues, but the PCM is likely. Just a guess though, without being there.
So do i have to disconnect the battery?
Mooke ThaNuke you definitely should, just for safety purposes.
Nexus Auto thanks....you should mention that.
Mooke ThaNuke very true. I mentioned it on some other videos, but forgot for this one. I wish we can go back and edit this videos... I would film a clip and add it in.
Nexus Auto after changing the coils......will it reset the car computer?
Mooke ThaNuke actually changing the coils will not reset the ecu. However, when you disconnect your battery, that will. If you choose to replace the coils with the battery connected, the computer will remain intact
Is there a way i can test if my coil pack is bad while coil is still on car? I had a buick i pulled the wire off the coil with the car running with my hands with gloves on and got shocked like a mf. Can i just pull the wire, start the car and see if its sparking?
Unfortunately, if you pull the wire, it will give you a good indicator of spark, but you'll get to know that spark real quick.
One of the easier tests, if you have an multimeter, is to test the secondary resistance in the coil. The coil for this car has a resistance of 5000-8000 ohms. I am not sure of the primary resistance, probably 1 ohm. Anything outside of that, and it is no good.
You can also try swapping the coils and see if the misfire (i assume that is your problem?) has moved.
@@NexusAuto yea, thanks for all the info by the way. Getting half tempted to take down your cashapp haha. But i read things like a missfire could possibly throw the knock sensor code and vise versa. I have a missfire on cylinder 5, i took the wire off the coil (@5) and started it earlier and it ran worse than if it wasnt taken off. But not terrible. I didnt hear the clicks or snaps that it would usually make when its sparking off something but at the same time i was in the car. Didnt go out and check under the hood as it ran.
I just got this car cause i miss my 08 that i traded off. This one needs some work but itll drive as is. Just a matter of figuring it all out before the motor grenades itself one day. Car wasnt taken care of at all. Even the coolant is, well pretty much muddy. Going to have to flush and fill with green.
@@NexusAuto and i dont have ome unfortunately, asked auto store earlier and they couldnt test it for me so im s.o.l there
@@daniel-ku4em I see. Try swapping the coils and see if the misfire stays on cylinder 5, or roams with the coil. That will be a good indicator of a bad coil or something else going on. You are absolutely right...a misfire can throw the code and vice versa. It's narrowing it down that is the pain lol. Hopefully you can get it worked out.
Glad to hear you have a GP once again, but sounds like you have a way to go. That coolant is so common, but such a pain to deal with. Sometimes you need to flush a couple of times to get all the Dex sludge out. But sounds like you're on top of things, which is great to hear.
@@NexusAuto never crossed my mind to swap placement of coils! Thanks!!
Just changed my plugs and wires and now I have missfire cylinder 6
Hard to say what the cause is. But it can really be narrowed down to plug or wire. May want to pull plug 6 and make sure it is gapped correctly. Make sure it is not cross threaded and the plug is clean. Check the wire and make sure it is installed on the plug fully, and the boot did not accidentally get torn or ripped. Reinstall, clear the code, and see if it.all good.
Had the same problem with mine just changed the plugs and wires and it shakes and the head lights Flickr when i come to a stop at the light and it act like it want to stall think GOD it didn't
@@kingrandor7272 Good thing you didn't get stuck. Recheck all wiring and the plugs. Make sure all the wires are back in the right spot. Sometimes these things happen. Hope you find the issue
@@NexusAuto thanks i hope so to is this a common problem with these cars when you change the wire's and plugs?
@@kingrandor7272 Not a very common problem. It is rarely an issue with the car, if I may be honest. I find in situations like this, it is 70% some sort of user error (plugs not installed correctly, wires not set up correctly, etc), 25% lemon parts, and 5% car error. It can definitely happen though.