Hi,
I'm getting a no spark condition in my 85 Chevy Caprice. It used to only happen when the engine was warm, but now it does it cold too, and hasn't started up for 6 hours. I hooked up an inductive timing light to it, cranked the engine, and got no flashing from the light. Also took a wire and plug, held the plug against the valve cover, cranked engine, and got no spark.
It has the HEI ignition. ALl my Chilton's manual tells me is that there is an "integral ignition coil" inside the top of the cap, and how to replace it. Also that there is a "module" inside the cap somewhere, and how to replace it. Doesn't say how to test them.
What's the most likely cause of the no spark ? How can I test it the coil and the "module"? I have another module of some sort bracketed to the passenger side inside fender which I think might be an Electronic Spark Control module, but Chilton's doesn't mention it.
I guess the rotor could simply be shot, too. I'll check that next, of course.
Any help welcomed !!!!
Thanks