I have a 2000 with a 4.3 sometimes it will just turn over n not start. i have tried ether in the carb n no start. in a few days it might start or in two weeks. any ideas???? if it gets started and drove everyday it doesnt seem to happen as much

 

Not throwing any check engine codes? Sounds like another thread that was very recent on here, and it has some issues with the crankshaft Position sensor.