ok whell it only happens when i start the car when its cold.. i just turn off the car for about 10 sec then turn it back on and its ok... it has coolant.. the first time it did it when i started it and letting it warm up i turned it off and tryed to fill it but then it just overflowed... i cheaked the ast hose because before it had a crack in it and thats what made it go off before now i dont see any cracks or rips or anything in there... anyone know what it could Be?

 

Have you gotten all of the air pockets out of your cooling system?

 

ummm how would there be air pockets in there??? and i didnt even know about it

 

yeah im haviung the same problem my car has coolant and we put a new sensor in and the cooolant light a buzzor still go off.

 

Ditto, I had mine pressured tested at Rotary Performance (TX) for a whole day and I still couldn't find the problem. The engine only has 12,000 miles on it and it tested out fine, not a coolant seal, I installed a new AST this morning because the one that came with the car seemed to have the lip worn out. I'm crossing my fingers.

 

the car needs to be 'burped' of air pockets when you fill it up with coolant. It takes quite a bit of time and paitience to get it completely full. There are many different ways to go about it, i find that filling it up, disconntecting the throttle body coolant hose, then filling it up more helps. I then reconnect the hose, start the car and let it run for a while, shut it down, and start the process again.

Do a search on 'burping' and you'll find lots of info.

 

personally the way i like to do it is take off both the ast cap and the radiator fill cap after the car is warmed up and squeeze the upper radiator hose. NOTE: on some cars, this requires removal of the i/c. at any rate, just search and there will be plenty of information.

 

sounds like a bad coolant level sensor. its black and right under the coolant neck. if thats unpluged it will buzz. maybe yours went bad or simply is unpluged....

 

whell wouldnt if i had to burp the car it would go off constantly at a random time?? but mine only happens on start up from when its dead cold... and thats it, after that i never hear the buzz again... but next morning same process

 

Try replacing your coolant caps (if you haven't yet).

 

the caps????? sorry im kinda slow the radiatior and ast caps?

 

If the seals on the caps are failing, they won't hold pressure. This can cause the situation you are seeing *if* they are old, worn and failing.

 

alright and if they are bad where would i get new ones?

 

AutoZone, NAPA or call Ray Crowe at Malloy Mazda.

 

ima gona have to try that cause we really dont want to end up taking the dash out to get to the coolant level wire. cause the gauge wire coust to the back of the speedometer according to wireing diagrams. thanks to chris b.

 

I did that on mine a couple of times. On mine it ended up being the lip on the AST that was slightly bent/wornout. After replacing the AST it solved the problem. I'm a happy man.

 

get the real mazda part,, dont be cheap and go after market

 

ok i found out that if i just turn the car on and let it warm up the light will go off within 10 sec of the car being turned on..... but if i start the car and drive it rightaway i will not hear it... but i really dont like driving the car unless its warmed up.. even if im going slow and not letting turbos kick in.... i still cant figure out whats wrong

 

ok i know this ius a newb question but what is a ast?

 

Air Seperation Tank. The original is mounted to the IC and is plastic. Should be rplaced with an aluminum one.
I had similar symptoms with my Fd twice and both times it was the coolant line just in front of the UIM on the top of the engine. It's under the pipe that runs from the Y pipe to the IC.

 

that thing that i put the square around?

 

ill cheak it out tomorrow its too late now

 

I'm fairly certain you have a small leak or it's escaping from the caps. I'd look for small drips of coolant under the car. My leak was this hose.

 

thanks for the pic ill cheak it