No You Only Need To Replace The Bad One.
If you have a misfire on all 4 cylinders you have your choice of replacing them all and hoping that is the problem OR finding a local s2k owner willing to swap coil packs for a day to see if the misfire clears up. If you can't find someone to trade coil packs with, then you have an expensive gamble...either the coil packs or the injectors are bad and there really isn't a good way to tell unless you replace one or the other. Ignition Coil packs run about $90 each. Some part of the engine, it probably overheated and you just need to replace the cylinder heads or if lucky the little rubber seals that most likely melted.
The 1988 cavalier and or jbody cars use a coil pack.You do not have a distributor and if a ignition issue is present replacing one or all coil packs are the answer.I originally stated it could have had a distributor but,was incorrect on my first response.As said if you replace the coil packs unhook your negative battery cable prior to any electrical work to prevent and problems and safety.
The newer style coil packs are no longer a maintenance item and don't really wear out. If one coil pack fails I usually just replace the faulty one. Unless there is visible damage or performance issues with the other coil/coils there is no reason to change them all.
This is how I diagnosed my 5.4 liter coil packs, I isolated the cylinder that was misfiring and then took a know coil from a good cylinder and swapped with the suspected bad coil. When the misfire went to the specific cylinder I swapped, I replaced that coil. Note- It is advised to replace all coil packs if you can afford too! Summit and Stylin has Hi performance coils for the fraction of cost as a single cost of the dealer's price.
remove the balance tube in the back romove the 6 coil packs held on by 2 bols per coil pack obtain a spark plug extractor socket add an extension to your socket unscrew all six spark plugs replace with factory or upgraded plus return all six coil packs bolt them down return the balance tube and bolt and done
The 1997 Chrysler Sebring 2.5L has a distributer with an intergrated coil. All other models have a distributerless ignition ("coil packs" as you say). The 2.5L V6 has a distributor with a buikt in coil, that is true regardless of year. The 2.4L inline 4 has a coil pack.
check the coil packs I had to replace all 6 in mine it is not hard to do you can get the coil packs at bavauto.com a new set will cost you $449.95 these are the high performance coil packs and if you dont know how to put them on you can see how to install them at www.wonderhowto.com you need to change the spark plugs too the best ones are the bosch platinum plus. good luck this took care of mine. email@example.com
Replace high tension coil wire. Probably time to replace all the spark plug wires.
I have a 1990 Lumina Euro 3.1 that done this and it about drove me crazy. I had replaced all 3 coil packs and thought it fixed it but then it happened again. Come to find out it was the ECM that sits directly under the coil packs. It's fairly easy to replace but the starter wire is in the way of the center coil pack, so you may have to remove it. Hope this helps.
Could be spark Plugs , Spark Plug Wires, Or could even be the Coil Packs. Not uncommon to replace coil packs every couple of years. There is 3 coil packs . That is one pack for 2 firing cylinders. they are easy to change. 2 small screws hold in each coil pack. you can buy just one coil pack and then just trade it around in your carand see which pack is bad. YOu can buy them at parts places such as Advance auto or Autozone for about 20-25 dollars. those are the first 3 things that i would try. Lastly it could be in the electronic module. that is the meat peice under the 3 coil packs , usually when this goes out the car will not start up at all.
There are 3 coils on all 3100 gm
If it has the 2.0 litre 4 cylinder with direct ignition remove the igniter coil packs by removing the retaining bolts and pulling the igniter upwards to remove it from the plug. Do this for all plugs. Remove the plugs as you would normally (need a long plug tool or an extension). The number three can be tricky because of the strut tower brace, depending on the tools you use. Replace the plugs. It's recommended that you grease the plug boot before replacing. Check an auto shop for suitable grease. Replace the coil packs and tighten the bolts. Don't know what the exact torque should be, but don't strong arm them!
Have you checked that the coil packs are all plugged in? Replace your spark plugs? Heck I would replace the plugs just to rule them out as the fault. I would need a little more information to answer this fully.
Module is located under coil packs at front of engine above starter motor.Label all plug wires, you may have to remove starter to get to it...
Depending on the manufacturer, many coil packs mount on a large transistor plate that actually fires the coil pack. It's not uncommon for those transistor plate to fail.
They are located on the passenger side of the engine. How you get to them is a matter of the degree of contortionist you are. Basically, remove all spark plug wires (number them as you go, according to the coil pack numbers). Each coil pack has 2 nuts, I believe they are 7/32 or 7mm nuts. Pull off the coil packs, install the new ones, replace the wires according the numbers you recorded. Have a nice day. I have found that if you remove the passenger side front tire that you can access the coil packs easier. There is a small flexible panel that you can fold away to reach the coil assembly. How many are there on the 4.3 L Will that explain multiple misfire code?
1. Disconnect the battery2. Label all spark plug wires so that they can be reattached in the exact positions on the Coil packs.3. Unhook the spark plug wires from the coil packs.4. There are usually 2 bolts holding each coil pack to the Ignition Control Module. undo all bolts and the coil packs should come off.5. The wafer the coil packs are attached to is the Ignition Control Module. Where the wiring harness attaches to the ICM, there is 1 or 2 screws too detach the wires. Undo these screws.6. On the new ICM place the new gasket onto the ICM, inside the area where the wires attach, be careful not too bend any of the wire prongs inside. I find a small flathead screwdriver and minimal pressure works well.7. Place the gaskets onto the prongs where the coil packs attach. Again do not bend the prongs.8. Attach new ICM back to the wiring harness.9. Seat the CoilPacks onto the ICM and seat the coil packs onto the ICM using the bolts to hold them on. Align the bolts with the holes to mount entire assembly back to the motor. You can attach ICM first to motor then attach the coil packs. The bolts that hold the coil packs to the ICM also hold the ICM to the motor. Tighten all bolts.10. Reattach the spark plug wires to the coil packs IN THE EXACT SPOT they were before removal. Getting the order wrong can really kill your engine.11. Reconnect your negative battery cable and everything should be okay.
no all you have to do is remove the block covers that cover the coil packs and remove the 8mm bolts and remove the coil packs to gain access to the spark plugs
ok .. if you open hood and look to ur right in the back where your spark plug wires connect that's where you ignition coil is .. mark all 6 wires whit the number coil it is hooked up to then remove all 6 sparg plug wires from the coils .... now the easiest way is to take the whole icm and coilss out to replace then other wise have small tools to fit ... any way ... theres 2 bolts to the left of the coil packs and one conected down but your egr ... take those out .. not u have more room to work ..... unbolt the coil by the 2 bolst one on each side then carfully lift straight up and replacing is same as remove... hope i helped Steve
it would be best to replace all
usually nothing. no warning except maybe a miss in the engine. if you have 2 spark plugs per coil pack, then one or both plugs do not fire and you will have a very noticeable miss and poor acceleration. engine may not run at all. it would be my suggestion to replace ALL coil packs, spark plugs, and plug wires if 100,000 miles or over.
The fully electronic ignition of the 4200 vortec LL8 Inline 6 cylinder engine does not use a coil. It in fact uses coil packs located over each individual spark plug. The wires can be seen on the top of the engine where they attach to the coil packs. The coil packs are held in place by long thin bolts that reach down to the cylinder head. Once removed they can be pulled off and the spark plugs can be accessed. www.trailvoy.com All the answers for your Trailblazer from true enthusiasts.
try replacing the coil.
( 1 ) that all 6 spark plug wires connect to coil---3---4 pack--2---6 plug---1---5