Why does 1999 mazda 626 cutoff when I press the gas pedal

SOURCE: Mazda 626

Hi Janieanip01,
Again we need more imfo....Is the vehicle injection?....If it is you'll have to wait until the fuel rail is re-pressurised before it will start....Crank it for about ten seconds at a time so as not to burn out the starter motor....It may be that the vehicle didn't run out of fuel but instead the pump may have given in....and when did you last replace the fuel fiter?
Regards Johngee10

SOURCE: 1999 mazda 626

I have the same car and had the same problem with the engine wanting to stall out, I ran  fuel injector cleaner through it and also an octane booster, i also changed out my plugs and wires and belts because i was also having the occasional squealing sound after i did all of that all of the problems have stopped and now my car runs like a champ 

Jeff Barton

• 520 Answers
• Posted on Jun 28, 2009

SOURCE: my1999 madza 626 idles rough when its in drive or when i cut on

this could be a case of carbon debris in the throttle body plates and idle air control chambers...simply might just need serviced/cleaned...pull air intake off throttle body and spray with a good throttle body cleaner spray including the idle air ports. Ive also seen motor mounts cause this as this is more of a vibration felt in gear

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.