1990 lumina no spark 3.1

my dad's lumina 3.1 died on him the other day. blew the 10 amp dis fuse .He changed the fuse only to drive the car another 300 feet. changed fuse again only this time with 20 amp fuse and drove another 200 feet car died again but did not blow the 20 amp fuse. Came home on a flatbed. meanwhile have installed new cps and replaced the coil pack from known runing car, still no spark . any suggestions:screwy: thank's Don

my dad's lumina 3.1 died on him the other day. blew the 10 amp dis fuse .He changed the fuse only to drive the car another 300 feet. changed fuse again only this time with 20 amp fuse and drove another 200 feet car died again but did not blow the 20 amp fuse. Came home on a flatbed. meanwhile have installed new cps and replaced the coil pack from known runing car, still no spark . any suggestions:screwy: thank's Don

Did ya try a different Ign. modual as well? if the engine wasnt missing during the 200 ft. drive, wouldnt hardly be the coils. Perhaps a pinched shorted out wire behind the engine to the Ign/coils?
I know on my 90 the wires will lay on the inner end of the passengers side CV axle if they arent fastened up out of the way.
Lumina's are weird anyway, had 2 fuel pump fuses blow over about a week, 2 years ago, never since. WHo knows.........

changed complete coilpack with ignition module. had some problems a couple years ago with injectors flooding engine really bad, turned out to be two wires cut in the harness on engine under the fan belt. Harness got cut by strap wires would ground together. going to investigate more in wiring harness soon as i have a chance

Checking that harness was going to be my suggestion. The wires from the crank sensor run under the front of the engine near the harmonic balancer, and are also close to the pass axle shaft as it goes from the back of the block and under. When you blow DIS fuses, a short there is the most common cause. Check the entire harness all the way from the CKPS to the module, as there may be multiple worn spots.

I cheked out the harness on the weekend and did not find any problems. now I am wondering if when my dad changed the fuse the second time for a 20 amp if that might have done something to the ecm/pcm?

Check for a bad spark plug wire by swapping wires or by using an ohmmeter to measure the resistance between terminal ends.(5000 ohms per foot)Check the primary wire connections at the ign. module to make sure they are clean and tight and check for voltage to the ignition control module from the ign module fuse which would be the side of the module with two connector harnesses.One harness connector will be wider than the other.With the ign. switch on,test the wider connector. With the locking tab turned up,test the terminal farthest to the left(with +(red)probe) while contacting ground with the -(black)probe.If no voltage is present,check ign. system fuses.If voltage is 7 volts or less,repair the primary circuit from the ignition switch to the ignition control module.If voltage is available at the ignition coil module and there's still no spark,check for a trigger signal from the ignition module.Remove the coil pack from the ignition module to expose the module terminals.Connect a test light between each of the module terminals and have an assistant crank the engine over.The test light should blink quickly and constantly as each coil pack is triggered to fire by the switching signal from the ignition module.(Use only an LED test light to avoid damage to the PCM)If a trigger signal is present at the coil,the computer and ign module are functioning properly and the problem lies in the coils.Check the primary and secondary resistance of the coils(DIS system-Primary resistance=.50 to .90 ohms@70 to 80- degrees F.Secondary resistance=4000 to 8000 ohms.If the test light does not flash,the ign module is most likely the problem but not always.I recommend having the ign module tested at Autozone.If the ign module is good,have the crankshaft sensor,camshaft sensor and the PCM,checked by a dealer service department or other qualified auto repair shop.Or,purchase a Haynes repair manual.:naughty:

After checking everything possible went back to ing module thinking the one i tried which was supposedly good might for some reason be bad? So i got one from a buddy of mine who own's a garage here in town, put in on crossed my fingers hoped for the best. Fired rite up like all chev's should. So the car is back on the road and my Dad's happy. Thank's for everyones help. Have a Merry Christmas and a Happy New Year.