Turns over great, new plug wires, cap,rotor,plugs,coil,cam sensor,crank sensor, new ignition control module, check all in fuses, check fuses at fues box wire test light.
it had started before---started to over heat, changed water pump, battery went dead, tried to jump, no help, tried to charge battery-no help.
So, bought new battery, turns over great!!!! It has no spark at the plugs!
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Re: 1996 chey blazer
Disconnect the connector for the fue injector on the left side front of the intake plenemn there are two wires on red one blue these are your fue injector wires, check for power on one wire with the key ON One has power with the key ON, and then take the test light connect one end on one of the wires coming out of the harness NOT the plenem and the other end of the testlight to the other wire in the same connector don't let them touch togother! sue a paperclip or cotterpin to let you connect the clip of the testlight to the connector.crank and you should see the light blink( I just want to narrow down the possibilities) If you see the light blink Good. Then make sure the PINK wire wire going going in the module has 12V KEY ON and also check the two wires inside the distributor that come from the pick-up unit make sure they are not broke the distributor pick-up unit failes commonly, its easier and less expensive to just get a used distributor that works and be done with it.
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Check fuses relays and ground wires. The check inside the distributor cap and make sure the piece the rotor inside distributor is clean of oil and the area below hall effect is dry and without oil.The piece down below is also a item that can effect it from firing.it is a magneto and it controls the firing and fuel by sending signals to the ecm. If you check the above without finding an issue the best thing to do is see if you can borrow a scan tool to get any codes that could be helpful with diagnosing. Im sorry if this isnt exact help but it is trail and elimination that fixes issues like this instead of just replaceing parts.
I would be thinking that there is a good chance that you need to be checking out replacing the computer, if you aren't getting any communication with the proper scan tool then the computer isn't communicating with anything in the vehicle...... I would have guessed first off that the ignition control module might be bad but that is obviously part of the computer also, I would be looking in that direction.
There may be no injector pulse if the computor does not see a RPM signal. There will be no spark if the ignition module does not see a dist pulse from the dist pickup.......a RPM signal. Because you do not have both ......I would suggest to check/change the dist pick up. Follow the wires from the ignition module inside the dist to the pickup which is also inside the dist. If it is just a bad dist pickup....keep all your old parts as good spares. Also...is the dist turning? to provide a RPM signal? You will have to remove the dist to change the pick-up.....mark your timing locations......"rotor position" and "dist body location"before removal. A quick test before installing the "repaired dist" .....plug it in the the truck wiring and turn on the key....DO NOT CRANK THE ENGINE OR YOU WILL LOSE YOUR DIST ROTOR CORRECT POSITION......as you spin the dist by hand .....the injectors should spray.
overheating could be caused by a stuck thermostat or a clogged radiator not firing on #1 plug could be a fouled plug or bad wire or it may be grounding on the block and your coiil may not have been put in at the right mark