I have an a5 paintball gun with electronic trigger, when i hook it to air and pull the trigger, the hopper is not moving!!!

First off do you have a hopper and an air tank or co2 tank with air or co2 in it. If no get those things and fill your tank at a local paintball field. If yes your gun takes a .68 caliber paintball. That's really any paintball that you can buy at Walmart or sports authority.

If you are using CO2 it may be affecting the system. With a gun down straight, you could draw liquid CO2 into the internals. A siphon tube can be installed in a CO2 tank to stop or manage this. If you have access to someone's air tank, try using HPA (high pressure air aka nitrogen). If it fires fine with air you have deducted that the CO2 is to blame. Simple. Switch to air. It's better for the gun anyway! Now if the air didnt change anything I would think a component of the response trigger system is to blame. I am not familiar with the response trigger( I use E-grips) but I would think that a part that may slide or move forward or bak when you lift the gun up would be to blame. Most local shops should be able to diagnose the problem. I did find an installation video by Tippmann on youtube.
Here is a link.
A5 response kit installation

Look at the "Tombstone". This is where the air comes up to the gun from the
bottle. There is an O-ring that is supposed to be toward the trigger side of the tube and many
times they fall out and there is no seal. You may need to buy an O-ring kit and replace the O-rings to fix the problem.
Here is your owners manual and diagram. I own 2 of these and after a few times
taking them apart it will be second nature.
http://www.tippmann.com/pdfs/products/A5/a5manual.pdf

Sounds like the gun needs lube. Oil it and try again. 2-3 drops of oil in the hole
where the tank screws on then put the tank back on. Fire it and see how it does.
I havent heard of a low pressure kit for the A-5 but I think it is a waste. There is a rule
with pressure and paintball guns. Low pressure=high volume of air used.
Standard pressure=regular volume. I have 2 a-5's with e-grips and flatlines.
I polished the internals by sanding the bore of the tube (use fine sandpapaer) and
this makes the velocity very consistent.
One thing that comes to mind is that the hammer may not be getting caught on the
trigger latch. Makes sure your gun is assembled correctly. here is your manual.
http://www.tippmann.com/pdfs/products/A5/a5manual.pdf

Make sure your battery is new. It doesn't take a lot of voltage drop to affect performance.

Make sure your marker is clean, and properly lubed with a quality oil make for paintball.

Make sure your board connections are secure. You can change modes on the e-trigger yes? Go through them and fire a few times in each to ensure it's changing.

Make sure you have a full tank of air while your testing to make sure this isn't a problem as well, or causing your issues.

Good luck!

Play hard, play safe, play with honor!

8^)

Some trigger upgrades do not work well with Tippmann guns specially with the E-trigger. I will exchange one upgrade at the time for elimination in order to find out which is causing the problem.

I can take that a couple of ways. Do you mean you want to fire more balls per second or you want the paintballs themselves to fly faster?

If you want to fire faster, make sure it's clean and properly lubed with a quality oil that made for paintball. Practice makes perfect and fire that ****** as often as you can, even without paint (that's cheaper!) so you can get your trigger finger in shape.

There are custom mods to the trigger, or you can buy a trigger that's smoother or a shorter pull. There are electronic trigger assemblies that make firing faster even easier.

If you're talking about making the balls fly out of the gun faster, that would be the "velocity adjustment". Your user guide shows you how to make that adjustment and which direction is up, and which is down.

A good suggestion is to check out a local field or paintball store, or an airsmith and they can give you some definite ideas you will want to pursue.

Good luck!

Play hard, play safe, play with honor!

8^)

The reason for this malfunction can be caused for two things, one is that the trigger is not sitting right or one of the springs is not in place another reason that may cause the problem is over lubing the hammer, but must likely is the trigger not holding the hammer in the rear position until you pull the trigger. Hope this helps.

To remove the response trigger you need to first remove the grip frame. Remove the piston and replace the fitting that supplies air to the piston with a plug. you can find this at any local paintball store or online at www.badlandspaintball.com. If you can't find this plug than you can leave it open as it is not under pressure all the time only when the marker is fired, you will waste air this way. Good luck