I have a Jetboil PCS, bought in Dec 2010 from the USA (we're in Sydney). It's worked wonderfully & we love it.
However I've just gone to use it & find that no gas comes out. We are trying to use it in Sydney, so it's not an altitude or cold thing. The cylinder works fine on a Kovea stove, but just in case swapped in another cylinder onto the Jetboil. Still no gas. We don't get as far as using the piezo ignition as there is no gas smell or gas hissing when the on/off knob is turned on/off. Á friend suggested that it might be a blocked valve, so we have used a fine pin, which goes down approx 1cm down & hits something hard. Have tried googling this issue for resolutions & tried the Jetboil web site without luck. Our fellow bushwalking friends have said that MSRs come with a maintenance kit to unblock jets & pull it apart. There doesn't seem to be such a beast for Jetboil, just buy a replacement burner for $US45.
I've emailed Jetboil in the US, the US supplier & Sea to Summit who appear to be the Aussie agents & am waiting their responses. Does anyone with a Jetboil have any suggestions that we can try?
Thanks very much, for any assistance.