could be distributor, coil or ignition module. usually the ignition modules fail first on them.
are the wires good? Plugs?
You didn't mention whether you've changed the coil wire itself. If it's faulty, you'll get no spark anywhere. Also, the power supply to the coil or module could be at fault.
UNDER THE COIL PACKS
is there spark through the wires to the plugs?
sounds like we are having the same type of issue, I replaced ignition Module and coil pack, and still no spark the last thing to change is the Computer.
Try the ignition control module. Had the same problem with mine $36 part fixed it. The ignition control module is in the distributor and so is the pickup coil, but the ignition coil is by the battery. There is a spark test that can be done. If it was already done and couldn't see a spark, then it could be the ignition coil it self , the ignition wire, or any possible electrical connections.
Its right above the ignition coil. Infact you have to remove it first to remove the ignition coil.
Please check your spark plugs,wires,distributor and rotor or the ignition coil module. My '93 LX has an ignition coil module.
The ignition control module on a 2000 Blazer with the 4.3 is mounted on the same bracket that the coil is mounted to.
The ignition control module acts like the coil and sends the sparks to the correct cylinder when the computer tells it to.
It's probably attached to the same bracket the coil is mounted to
either the coil or ignition control module
The Ignition Control Module (ICM) is located directly above the coil. If you remove the 2 bolts holding the coil on and then romove the coil mounting plate from the car you will see a small rectangular module with wires plugged into it. This is the ICM.
On my 90 740gl it is right next to the ignition coil. It depends on the ignition system used. On a Regina ignition, I think everything is built in the coil (The big square one) The regular round coil is for BOSCH ignition and a separate module is use. NOT SURE, would appreciate confirmation.
There is no coil wire. There is a coil pack and connected to the coil pack is the ignition control module.
The ignition module and coil are contained inside the distributor and are not serviced as separate parts.