Hello All. I'm working on a 1997 Accord LX. It has loss of power and seems to be missing. I'm suspecting the coil is at fault. Do you happen to know how to test it? I've changed the plugs. The cap and rotor are worn, but don't look terrible. In doing a spark test I don't see the white/blue spark I'd like to see, but more of a blue/yellow spark. I think I'm not getting a complete burn. The CEL came on once with 2 codes....0303, misfire on #3 and 1399....manufacturer controlled ignition or misfire. Could be the igniter as well, but due to the spark condition I'm thinking coil. Thanks in advance for the help.

 

Using the following picture...



-disconnect the 4p connector from the coil as well as the ignition wire.
-with an ohm meter measure the resistance between the A and B terminals, it should be .6 - .8 ohms.
-using the ohm meter again measure the resistance between the A and Secondary Winding terminals, it should be 14K - 22K ohms

These specs are for a coil around 70F, a coil at a different temperature will have slightly different resistance. If test do not check within specs, replace coil.

-next using the ohm meter again, check for continuity between the A and C terminals.

If there is no continuity, replace the coil.

I hope this helps.

 

Thanks, I'll check it out.