ignition problems

ive got a 91 lumina 3.1L having ignition problems mainly no spark. car overheated on me got it home and would not start for me. started checking things out found a fuse that was blown labeled as DIS replaced it with a 10 amp fuses. now i have power on driver side of ignition module but none at the six prong plug on the passenger side and still no spark. any help would be great.thanks.

Did you use a test light to check for power. If so, bad move. Your dealing with a computer which mainly deals with 5 ref volts. If you have one use a multimeter.
First check all your fuses, a test light is recomende d here.
Then, with your voltmeter and your key on and engine off, check for 5 volts on the white wire leading to your ignition module. If you don't have 5V here check your powers and grounds on your ecm.
It's also a good idea, if you have access, to check for codes via a scanner.
Also check the knock sensor for 12 volts and a good gnd.
Do you have any spark or none at all?

You may have fried ignition module or a wire when it over heated.Only place i found that test them is Autozone.First Autozone had a bad tester.Found that out when their new icm off their shelf failed 2 test out of 6.Then i went to 2 other stores it passed.Crank sensor on mine is good too.But my ecm c5and c10 grounds are bad. I know they go Coolant temp,coolant level,maps and Egr but icant find exactly where they ground.I still have a no spark no injecter problem.Replaced Ecm with a new unit from Auto Zone but it too was defective off shelf with a power pin set in too far instantly popping ecm fuel relay fuse.3rd ecm from store looks ok but is still not working.Waiting for a Ecm i got off of Ebay for a lumina with the prom already in it.