run a jumper wire from the battery to dist . crank it and see if it will fire.dont leave jumper wire on though!!could be in your starting system.i fixed a ford this week that had a bad switch,owner had simply ran one wire from battery through a momentary switch,and then back to solenoid.it would crank wonderfully but he forgot switch gives a full 12 volts to ignition while cranking.If you have the same(and lots if not most do)it will start sometimes and others not depending on lots of times just a change in temperature,or weather,or wheather the engine is cold or not.A good indication of this is when it fires when you let off starter switch but engine is still turning.In that instant it gets full voltage to ignition.Which is what yours sounds like its doing.Sometimes it will go ahead and run,but if your battery is down from cranking it wont simply because voltage is too low until engine gets enough rpms to make alternator work.The same will happen "rarely" if you have a small battery in a vehicle with a large cranking load.It simply takes so much to crank it cant fire.this is why theres more than one size battery,or why some tractors have two batteries etc.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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