Does not have fire on the 2 & 3 cylinders.Plug wires do nnot have fire. How do I check the coil to see if it needs replaced. This is a 1978 KZ 1000 A2.

Here is the firing order and spark plug wire routing diagram for a 2006 Chevy Impala LT 3.9 V6:
Firing order: 1-2-3-4-5-6
Spark plug wire routing (starting from the driver's side):

• Cylinder 1: connect to the coil tower closest to the driver's side headlight
• Cylinder 3: connect to the coil tower next to cylinder 1
• Cylinder 5: connect to the coil tower next to cylinder 3
• Cylinder 2: connect to the coil tower closest to the passenger side headlight
• Cylinder 4: connect to the coil tower next to cylinder 2
• Cylinder 6: connect to the coil tower next to cylinder 4

Note: Make sure to route the wires properly to avoid cross-firing.

theres no distributor and the firing order for your 3.8 is 1-6-5-4-3-2-the following link shows the coil pack
Buick General Motor 3800 V6 Engine Firing Order DIS IDI ignition timing 3.8 Buick Engine Coil Pack Firing Order Spark Plug Wire Location Which way do the spark plug wires go on & what cylinder is what?
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For the Buick V6 231 3.8 liter turbocharged engine:
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Answers!
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Firing order:
1 - 6 - 5 - 4 - 3 - 2.
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Spark plug wire location on coil pack:
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Closest to the back of the car, left to right: 1 - 5 - 3.
Closest to the front of the car, left to right: 4 - 2 - 6.
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Spark plug wire location on engine:
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drivers side, front to back of car: 1 - 3 - 5.
passenger side, front to back of car: 2 - 4 - 6.
.----and this link shows the coil pack to cylinders
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3 8 Buick Turbo Engine Coil Pack Firing Order Spark Plug Wire Location

fzr firing issue The FZR Forum


Hope this helps, Nik.

SPARK PUG/BOOT AND FUEL/OIL LINES/FILTER REPLACE CARB OR CLEAN/ADJUST

Check engine light on ? Code's ? What engine ? 2.3 l 4cylinder or 3.ol v-6 This vehicle has coil on plug ignition system , not coil packs ! a coil per cylinder . If new coils an still has no spark , has no B+ voltage to the coil or the PCM isn't controlling them . Without testing i'd only be guessing as to the problem .If the repair shop you had it to can only say it had to be the coils , I'd find another shop to take it to !
Autolite Coil on Plug Ignition troubleshooting

Hello mikew564.The first diagnosis was number 2 or 3 cylinder not firing. Once you changed the coil, the check engine light went off. When the light came back on again, did you get it diagnosed again to find out if the problem was the same?... 2 or 3 cylinder not firing????

First of all, there is NO extra wire/ground on the coil/ignition wiring (see images below). The spark plugs and ignition plug wiring can be checked for arcing, corrosion, resistance and can be checked for cracks in the insulators or worn electrodes (and spark gap) by a competent mechanic.
If you are having the same issue (2 - 3 misfire), there are several techniques for eliminating the plug wires or spark plugs. Spray water on the plug wires to see if they are arcing. Swap plugs from cylinders 2 & 3 with cylinders 1 & 4. If you still have a 2-3 misfire, check/inspect/examine the coil connector pins & coil harness to the coil(s) themselves.

Try to change coil from one side to the other, if the spark goes to 2 & 3 but not 1 & 4 you need the coil replaced or find the power loss (blown fuse) .I have not worked on that bike so am not sure. also color code on wires in the harness will be enough to follow wires without the book,no need to cut them open just note the colors at the point you are trying to check,follow along the way untill that color comes to a conector. or to the fuse buss or device.A multi meter can check condition between points Hope that will help you good luck .Joe

While checking for "spark" = "fire" make sure you do it properly. These shocks hurt and could result in injury or even death.
1. Pull and check the Spark Plug for Cylinder #3. There are spark plug tester's at autoparts stores that you can buy and some are for rent. They are easy to use. If still no Spark PROCEED to Steps #2 and #3 below before replacing the Spark Plug. If the Spark Plus is dirty, fouled, or incorrectly gapped: clean, and regap the plug and recheck.
2. Check for "fire" at the spark plug end of the wire for Cylinder #3. Is there consistent sparking? If not then PROCEED to Step #3 below before replace the wires.
3. Check for "fire" at the Coil="Distributor" for Cylinder #3. Is there consistent sparking from the Coil? If not the Coil could be Bad.
If there is Consistent Spark from the Coil but no Spark from the Wire = Replace the Wire.
If there is Consistent Spark from the Coil and Wire = Replace the Plug.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

which two cylinders?