Bad CDI?

[bfraser22]

I have a Honda BF15a and I have a really bad idle when cold. I've gone through the wiring and cannot find a loose connection but when i squeeze/position the cdi box the outboard idles perfectly. I've payed close attention to the wires when adjusting and they don't seem to move. Could I have a bad cdi with possibly a loose connection inside? It seems that when the engine warms up everything goes back to normal.

 

[km1125]

That would really surprise me. I don't believe the CDI has any temperature input, so it would not have different circuits for when the engine is cold or warm. That means the problem should still (even if intermittently) show up when warm.

 

[Mc Tool]

if you can replicate the fault by squeezing the cdi module , plus the thing working when warmed up ( the change in the temp of the cdi can cause things to "move about " ) makes me think of a dry joint somewhere in the cdi . Depends how brave you are , but I would have a look for dry joints using a magnifying glass..........if you can get the thing apart.