My mazda 626 at idle read 1500rpm. when moving it will suddenly stall, at times when moving slowing in traffic, it stalls. what can i do?

2012 really ? what country? we have no 626 year USA that year
or do you mean the Mazda 6"? 2.5 or 3.7L engine?
cut out means what, be more exact in what that means
ALL DC power and lamps and engine and radio die , on the fly.?
or just engine, all lamps good.
lost power means engine power or DC power or both.
engine stalls. are complex over 50 causes in engine or EFI.and more.
can the stall (stall means engine goes to 0rpm) but can you prevent the stall with a fast right foot?????
does the engine restart easy, at stall? or not.
is the starter motor always working(cranking), after the stall?
stalls may only happen on hot or cold engine or both.
bad spark is #1 cause of stalls. (and lots more ) try new spark plugs.>?
EGR stuck open
IAC stuck closed(idle valve gunked up)
battery died, or alternator dead or intermittent.(or going off line for battery gross shorts or opens)

mazda 6
Mazda since 2002, replacing the long-produced Capella/626.
and
The 626 replaced the 616/618 and RX-2 in 1979 and was sold through 2002, when the new Mazda6 took over as Mazda's large family car. 4,345,279 of the 626 and Ford Telstar models were sold worldwide.

post real car model names and real engine size first and even country the car was delivered to first or the VIN that tells me all that.

Sounds like vacuum leak.Check with vacuum gauge, and check timing also.

Engine stalling and rough run issue at low speeds

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

start with cleaning the throttle body and the idle control valve

The cooling system?? That would be my last guess, right after the spare tire. Sounds like an electrical issue. Quite often remote starters, especially those not installed at the factory, can cause these problems. Is there a "check engine" code?

check connection to cam sensor. sometimes corrosion will cause a poor electrical connection. clean as needed. otherwise you may have to replace the sensor.

I have a 1997 626 2.0L 5speed when im driven it like rev limits cuts out around 3500-4000rpm, and when i rev it up and past 4000rpm it stalls, anyone have a idea whats wrong??? thanks i just replaced the crank sensor and egr and still. good power put cuts out

Check the EGR valve



Please rate this a fixya

low idle speed...or the need of a tune-up

HOWS THE TIMING? WAS THIS CONVERSION DONE RECENTLY OR DID THE PROBLEM SUDDENLY OCCUR AFTER A WHILE OF THE CONVERSION? WHICH POWER CHAIN MODULE IS BEING USED? (COMPUTER)