Car started and died immediately. ether started again for a second s we think its a fuel delivery issue. is the pump accessible under rear seat

This sounds like a fuel delivery issue. The fact that the engine starts and runs when you add starter fluid suggests that there is a problem with the fuel pump or the fuel pressure. It could also be a problem with the fuel filter or the fuel injectors. It would be best to have a mechanic diagnose and fix the issue.

Is the pump running? have you checked the fuel pump relay and fuse?

If it dies immediately when you remove the starting fluid the issue has to be with fuel delivery.

On some vehicles the FUEL PUMP can be accessed from under the rear seat without lower the gas tank. It would help to have more information about what your dealing with. I had trouble with my 1999 buick century, it wouldnt start. it ended up being a fuel delivery issue the shop i took the car to said i need a new fuel pump and sending lines, however i couldnt rationalize spending the money they were asking. I ended up fixing the fuel pump myself without spending any money. I got my infiormation from http://autoabsolute.ca they have an expert help section, i explained my problem and they sent me a detailed tutorial with a video that made fixing my car a breeze.

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Seems like a fuel delivery problem.
May be a bad fuel pump, clogged fuel filter or a fuel line problem.

What car make/model? What engine?

When it dies, try to turn ignition off immediately, wait a couple of seconds and turn the key quickly to the crank position (don't wait with the key in ignition-on position so that the fuel pump doesn't try to pump fuel into the fuel lines).
If it hesitates to start or runs significantly shorter before dying, you have pinpointed a problem with the fuel system.

Pls let me know what you find out.

Bad fuel pump in the tank.

That clicking is one of the actuators for the rear HVAC system. They sometimes fail or get stuck when there is a loss of power.

Sounds like your fuel pump is going out. The easiest check is to pull out the rear seat cushion and remove the fuel pump access cover in the metal body under the seat cushion. Once you get the car started, drive it around someplace where you won't mind breaking down at. You will hear the high pitched wine of the fuel pump the whole time, what you will be listening for is when the car dies does the fuel pump stop as well. If it does, that means that is why the car died, because the fuel pump shut off. If you replace the fuel pump... wear safety glasses, disconnect the car battery, and have a repair manual w/ you at all times for reference.

I would say that you are on the right track , I think that maybe when the work was done on the fuel pump assy the mechanic may have pinched the power wire and hitting the bumps has caused it to short.you will have to take the seats out again (sorry).You need to look for a damaged wire or evidence of arcing .Hope this helps.

Try to start with a less expensive procedure. In addition to relay I would check the spark plugs, wiring set and distributor cap. Also coolant temperature sensor can be a problem. Try to warm up the endine block of car with dry heat (hair fan or heat gun, but gently). Sometimes it helps. If it works problem is spurk plugs, distributor cap or coolant sensor. Also would be usefull to chek the fuel filter.
But first for cold weather sometimes it worthy to use the injector cleaner/or octane buster and better fuel which evaporates better and less viscouse motor oil. And of course check the battery.
Good Luck