Car was running a little sluggish, changed plugs and car ran great for 45 minutes then started running rough. checked ignition module, coil packs. all ok. replaced wires, ran better then started running rough again

You will need to figure out if you have spark to the plugs, and if not- if you have voltage to the coil to proceed.

I would suggest you go through your entire ignition system. I would start with rechecking the 2 dead plugs for spark. Check all your plug wires for ware and damage check the plugs themselves. The induction wire and im not sure but if you have a distributor check the cap. If you go through the entire spark system and it is getting a good spark you might want to start checking out the engine itself.

Your ignition spark control module is going bad,your coils pack are located right underneth them. this is what tells your coils packs to produce spark to your spark plugs. they are easy to replace just make sure you mark you coil pack with some tape and make sure you put them back in the same order as they came off the spark control module. Easy to replace,just make sure you use the proper size torx or socket size on the screw heads...

check and or change the plug wires also check for a crack coil pack which is highly likely on that model and also check the ignition module as well

Replace the coil for number 3 cylinder.

Check for bad spark plug wires or wires connected to the wrong cylinder.

I think the problem is more in the plug wires/plugs. Get a long piece of plug wire, long enough to fit to any plug, and check the plugs, one wire at the time. You'll rule out wires and find the bad one if there is one.

Simplest way? Go to your nearest Autozone, and ask to hook up their portable handhelt and check your engine.

Bet it is plugs and/wires. You checked two with no response? Replace those!

Hi check all the fuse. fi the fuse are ok . remove the coil pack and reverce if the cly missifire change replace the coil if not chage replace the electronic comtrol module ok.

Best to do a fuel pressure test, pump might be weak and dosent show up until it gets gets warm. Best to do the test after it quits again when pump is at its hottest. If you havent done it yet chg. fuel filter too.

look for the distributor or coil pack if its a dist. the the module is under the cap if its a coil pack it under the pack itself or next to it its plugged in with a wire plug. hope this helps you.