Ignition system diagnosis.

[Olle Gladso]

Yesterday I had a 20001 Honda Civic with a misfire.This vehicle has a distributor.

The misfire would only occur when warm. The vehicle has a new distributor, plug wires, and spark plugs. Also a new timing belt.

The ignition coil is in the distributor, under the distributor cap.
I taped the CX probe to the outside of the cap, close to the ignition coil and connected the synch probe to cylinder number 1's plug wire. The oscilloscope performed flawlessly and I could clearly see the problem in cylinder number 2. Also, the histograms are fantastic!

I have attached a picture and a link to the oscilloscope file.
https://drive.google.com/file/d/0By3Vmq ... sp=sharing

Feel free to share the file and the picture.

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[knyshmotors]

Un defecto poco común del módulo de encendido.
Se ve la presencia de una chispa parasítica.

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Ignition_modulo defecto1.mwf

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[Roberto Franzi]

hola ese modulo es de chevrolet ? tuve una falla parecida y la solucione invirtiendo la polaridad(conexión)del cable del sensor de rpm -

[knyshmotors]

Si es de los viejos Chevrolet, Opel, Daewoo. Basicamente éste módulo consiste de dos partes, una convierte la señal de sensor indictivo a una señal cuadrada y lo envia a la ECU, otra parte recibe la señal de comando desde la ECU para el comienzo de carga de la bobina y el disparo de encendido.