Hi my mother in law just gave my daughter her 2004 Mazda 3. The brakes weren’t working and the pedal goes to the floor. I checked the fluid and has plenty. I tried to bleed the brakes and the driver front and rear bleed fine but the passenger front and rear there is no fluid at all. Just air. I tried to vacuum bleed and sill got nothing but air on passenger side. Would that be the master cylinder that would be bad and causing that issue? It’s a auto trans 2.0L any help would be greatly appreciated.
Thanks in advance

 

Does the car have ABS?

 

Yes it does

 

Would a bad abs pump cause the peddle to go the the floor and fluid to not go through the lines? If so how could I check the abs pump to see if it is faulty?

 

It unlikely that your ABS is bad before you started your brake service. If you got air in the ABS during your brake service or if there is still air in your "complete" brake system you will need to do a properly serviced ABS system service and bleed. There are many on line sources that can explain "how to" service.

I can say if you continue to use your brakes without properly bleeding the ABS you could damage the ABS which is not inexpensive to replace.

 

When we got the car the brakes were already spongy. My father in law told me that the abs light had been on for a couple weeks. Before it was on all the time it would come on and trim off after a few minutes. That is the reason I was bleeding the brakes. When I opened the bleeder on the rear passenger I pulled air for 10 minutes and not one drop of brake fluid. The rear driver had no air the front passenger I pulled airs for another few minutes and not a drop of brake fluid the driver front had no air. If a was vacuum bleeding the brakes wouldn’t it pull the fluid through the abs module/pump?

 

I have never understood why anyone continue to drive a vehicle when there is a trouble light activated? Don't take offence this dates back to the early 80's when customers would drive for days with the oil light or coolant temperature light on, in the 90's it was the airbag light, and in the 20's tire low pressure light....or the simple check engine light. Maybe because some of these are yellow cautionary light it is thought to mean "ignore" it might go away and RED light means I better get it looked at when I have the time to take it to a shop. lol

You have a problem with your ABS and brake system that I would advise that you as a DIY to have a service shop inspect your brakes and brake system and give you an assignment of your problem The small amount for the inspection fee you may spend will give you a better idea if you can DIY the problem or if it will require tools you may not have to correct the problem.