Why does my 1997 mazda 626 die after I rev the engine?

SOURCE: looking for part number

PLEASE BE INFORMED THAT I WANT TO FIND MY MAZDA CAR ELECTRONIC CONTROL UNIT, THE BELOW (5K) CODE WAS MY ORIGINAL BOARD:
BMV9C
5K
BMV9
EGI
BMV9 18 881C
079700-5262
12V DENSON
*005262F*

CAR MODEL:
MAZDA LANTIS 323
1.6 MANUAL
BVV6 (1995 SERIALS)
ENJIN:B6-503910
CASIS:BA1161-MM-500158
COLOR:MA572

SOURCE: '98 Mazda 626 Died and will not start again..HELP

b_bro

Check the Fuel injection system (injectors) and the intake manifold. It might also be wise to check the alternator as well as the starter coil and also the electronic distributor

SOURCE: When accelerating the engine seems to stutter.

Try unplugging your Mass Air Flow Sensor (MAFS) - you'll find it on top of the metal body immediately after the air filter. I went through an 18 month ordeal - replaced fuel filter, fuel pump, dropped fuel tank and cleaned it, ran 55 gallons of fuel injector cleaner through the system - nothing! After reading some blogs on this car/engine, gave the MAFS unplug trick a try. The car instantly corrected itself (when you unplug this sensor, the engine control module reverts to factory default, allows sufficient fuel into the engine for unitterupted performance.) However, if this corrects your problem, it's only a temporary fix. Run it about 3 days - it you notice soot in the tailpipe, the factory default is running too rich. Replace the MAFS.

SOURCE: 91 mazda 626 erractic idle surge when engine is cold

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?

SOURCE: 1999 mazda 626 4cyl runs rough at idle , engine

You may have to dig deeper for a vacuum leak. It's possibly the intake manifold gasket. Try spraying some starting fluid around the intake manifold. Also try disconnecting the brake booster and plugging that hose, the diaphram in the booster could be ruptured, causing a vacuum leak. Check the PCV valve and hose too.