My new 94 mazda 626 2.0 is very hard starting

Check fuel pressure and timing. Sounds like when you shut it off it jumped time.

Did you ever think the battery is no dam good?

how long has your check engine light been on

Your "crank angle sensor" may be getting to the end of its life: the fault you have described is a common symptom of this failure. The sensor is easy to replace but not cheap to purchase.

recheck all connectors. something has to be left disconnected. if you know there is no spark at plugs i would start around the distributor area.

Hello if you car doesnt want to stat all the time,then the next time it dosent hold up on the ignition switch and turn the key. If it does then you have a switch problem.This is common in the mazda 626

My '91 626 did the same thing. I tested the throttle position sensor, and it was good so that wasn't it. The other likely culprit is the Idle Speed Control valve, or Idle Air Control valve, which is a $500 part new (more than I paid for the whole car). I pulled one off a 626 at the salvage yard and got it for 3 bucks, put it on (it's an easy DIY, just 4 philips screws holding it to the intake manifold), however I can't be sure that solved the problem, since I haven't run the car much since then. It would seem the most likely cause, tho, and a cheap fix if you go used. Other possibilities: O2 sensor or Mass Air Flow sensor?

The upper radiator hose runs into the thermostat housing. Remove the front of the housing and you will find the thermostat.

i would start by checking the spark plugs and leads. if that ok i would think there is a problem with the dispack that the spark plug leads fit to, if its cracked or any rust i would replace.

plugs/wires, fuel pump, fuel filter, maf, bad fuel pressure reg. depends on what it drives like, hard to answer without driving it