2000 Toyota Camry (V6)

[userpete1037]

I am having an issue with my car starting. When it has sat for a while it starts right up with no problem. Well sometimes there isn't a problem starting it but there are times when I have to crank it several times before it catches on. I changed all the plugs and it stop doing it for a couple weeks then it started back. I changed the plugs yesterday and it's still doing the same thing. I noticed though when I disconnected one of the coils that the wire runs to and pulled it out, there was some white powdery substance on the shaft. Is this a sign that the coils need replacing or something else?

[userpete1037]

I changed the coil packs on it and I thought I fixed the problem but it didn't. It's still not starting at times. When I let it sit for a while, it starts up. Not sure what could be causing this. Could it be a relay or something?