Hi guys,

I have a 1993 civic.
I believe i have this problem narrowed down to the coil but i would like some other opinions before i order this part.

Problem: Driving down the and car died. Power was still on but just died. Car would not start because i now have no spark from the distributer.

What i have Tested/Replaced: I replaced dist.cap and rotor. I tested the coil. Primary resistance is at 1.1 Ohms and secondary is at 13kOhm. For the icm i have 12 volts (when connected to coil) across the two wires that connect to the coil. With coil disconnected and light bulb in place of it, it turns off and on when i turn it over. This tells me that everything b4 the icm and output of icm is ok.

The recommended primary resistance is between .6 and .8 ohms were mine is 1.1 ohms. does this sound like a coil or icm problem?
Also could an icm ever "kind of " work? what i mean is could the icm be switching but not be outputting enough voltage to the coil?

Let me know if i was not descriptive enough.
Thanks for any help

 

I would suspect the ignition module before the coil. A light bulb simply does not have the proper impedance (internal resistance) and it cannot react fast enough to changing voltage to be a reliable test tool for this type of circuit. You need to use a logic probe, which is a high impedance test light that uses LED's instead of a bulb which uses a filament. They can flash really quickly.

Your coil resistance seems acceptable but I don't usually trust testing them with an ohm meter anyway since I've had bad coils that tested good on a resistance check.

 

just recently had a 94 accord at the shop for same thing....igniter was the problem...rarely does the coil go bad...

 

any codes? i would say the igniter also

 

At this point I would also have to guess ICM. 94