Some times fire then stops - Hitachi NR90GC 3 1/2" Gas Powered Clipped Head Framing Nailer

Broken timing belt?

PLEASE do not use this dryer until it is fixed. it may be a saftey hazard. From the sounds of it. Your ignitor is only getting a signal every now and then. Now either is a coupler in there to tell the ignitor when to fire and when not to fire. It seems that it is going out only alloweing the dryer's ignition to come on only when a new cycle is started. That is where i would start... check with an appliance repair shop and find out if it will be something you can do your self or if it is something they have to do....
Now I do STRONGLEY recomend that you have a service technicion come on and service your dryer do to the fact that it is a GAS dryer. if something inside the dryer where to get pinched or broken it could cause a bigger problem....
so please take this advisment under consideration....
Thank you.

Check the fuel pump relay ?

First you must determine if the fuel is stopping or the spark is stopping..If the fuel is stopping this could be a computer problem.. If the spark is stopping then it could be the IGN Module in the distributer. or any nomber of sensors. Squirt a little fuel directly into the Throttle body on the intake manifold.. If the truck runs longer its probably loss of fuel.. Do this several times to make sure, be careful and only use a small amounty of fuel.. you do not want a fire.. RE: Spark: Take a plug wire and an old plug..put the wire on the plug.. hold the plug against a good ground .. have someone crank the engine .. does the plug stop firing? The engine dies.. and will not restart for a minuet or so.. during this "no start" time do the plug test. If the plug will not fire during this time take the module out and take it to Orillys Auto parts.. They can test it.. really expensive part. Don't replace until you know it is BAD..

When was the last time it had a tune up? If you can't remember I would go ahead and change all your plugs to start.

check the spark plug gap first -25th ,a wide gap will stop it from starting

Try a compression test, as it sounds like your car has jumped timing. (Belt or timing chain)

Go on ebay and buy a new CDI computer those bikes are notorious for computer failure.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/brandon_79b580f5a99c4386

Unplug the oven for at least 30 minutes. Plug it back in and see if it stops. If not, the control board has a problem (could be just bad connections).

Was it back firing before your son replaced the timing belt.