krowtis

1995 LT1. No spark. None. New opti, coil, module, etc…. Im gonna start poking wires today. I’m thinking relay is bad somewhere. Or I get to replace it ignition switch. All fuses are good also.

On to the question. If my fans are unplugged ( I believe I started the car a few times with them unplugged) would that cause no spark? On break from work and I just thought about this.

If anyone has a wiring schematic for the ignition that would be great. I’m sure though shbox has it on the web. Love that ****. I have a GM factory repair manual on my broke laptop. Sucks. Need one of them soon so I can get the data from the car. Have a Haynes book, but really it kinda sucks.

and sent a video of it going. Took my oldest out for a quick drive down the road. Second gear is a little touchy

Injuneer

Shoebox has the electrical schematics:

4th Gen LT1 F-Body Tech Aids

Ignition:

http://shbox.com/1/95_ign_system_schematic.jpg

Factory service manual download, courtesy of GaryDoug:

http://www.mediafire.com/?40mfgeoe4ctti

Shoebox check for Opti signals reaching PCM, and sending firing signal to ICM:

4th Gen LT1 F-body Tech Articles

Where are you checking for spark - at coil wire, at plugs, both of the above?