When van is started,it clicks after2-6 times it will start

Check your battery cables and starter cables especially the connectors and bolts under the hood. The bolts and connections could be loose or corroded. Check the connections near the battery and on the battery since many times mechanics mess with these the most. My guess is something is loose if it starts well most times, but fails occasionally. Did you look for blinky codes or DTCs? A '47' (or P0562) could mean a bad battery or alternator, and a '12' (or P1684) could indicate intermittent connections. Do the dome lights dim or stay well lit when the clicking is heard during cranking? If so, then the issue is most likely near the battery and if not then the issue is more likely near the starter. Good luck. There are a lot of wires under the hood.

Hopefully it is a loose connection on your battery. In my case it was a loose wire on my starter I believe a loose or corroded wire or ground on starter ,alternator or battery can cause this symptom.

The last time I saw this, it turned out to be a bad ECM due to shock. This was a Grand Caravan which didn't have any major damage as a result of the colision.

It could be a bad ground connection check the ground cable and also the ground jumper between the motor and firewall.

I Think Your Problem Is Still With The Fuel Supply,Have You Changed all Fuel Filters,Follow All The Fuel Lines Make Sure There Are No Kinked Fuel Hoses,Some Times You Find Small Filters In The Top Of The Fuel Injectors.
Hope This Helps

If i understand you clearly. your van needs to be checked for mobiliser operation and/or key sensor ( Try spere key)(my email add: [email protected])

If no click no start, replace ignition switch
If click no start, try smacking starter with a hammer, if it starts replace starter, otherwise, replace starter solenoid...

Starter motor relay! - not sure which one it is - definitely sounds like starter relay tho.
if you disconnect the main wire from the starter and turn the key you will kear the relay clicking, find it and replace it... should solve your problem.

Check your battery voltage. It may be new battery time.

Bad connection , battery cable bad ect.... voltage drop test .
Starter Voltage Drop
How to voltage drop test starter motor circuit
Looking at a wiring diagram to see what all is involved in the starter electrical circuit for your vehicle .would be a good thing to do. Do you know what a wiring diagram is ? How to read one ? How to use a DVOM- digital volt ohm meter to test automotive electrical circuit's . Free wiring diagram here http://www.bbbind.com/free_tsb.html Enter vehicle info year , make , model an engine size. Under system click engine then under subsystem click on starting . Click the search button then the blue link. Testing the electrical circuit's is the way to find the problem .

Chevy Truck No Start Flickering Lights Gauges Voltage Drop Testing