1994 Maxima Gxe 140k miles. while driving today brake pedal almost went to the floor. was able to make it home OK. car will still stop.
can i still use the car?
any idea on the problem?

 

do you value your life and life of others on the road? if the pedal is low then there's a problem with the system. i wouldn't drive it until you have restored braking power again.

- leak in the system (check rusty brake lines, level of brake fluid)
- leak in the front caliper
- leak in the rear wheel cylinder (pull the drum off the rear and see if you see fluid leaks)
- leak in the rubber lines
- failed/worn seals in master cylinder (usually you'll see brake fluid under the MC dripping down on to the booster)
- since it's a 94...check for leaks at the ABS pump. it's the big ole block of metal with a bunch of metal brake lines running to it under the hood

 

I would not drive the car except to a mechanic. that's what i was asking or should it be towed?

 

IMO - when your car does not start, that is an inconvenience. When your car does not stop, that is a more than an inconvenience. You could end up badly hurting yourself and or others.

Agreed with all the advice above - most likely a brake fluid leak. You definitely should look for the source of the leak. I would also take a look at your brake fluid reservoir to see how low the fluid is. That give you an idea how bad is the leak and whether you would even risk driving at all.

Brake fluid leaks are easily identifiable because of the wet marks left behind. I had a similar problem when I noticed that my brake fluid in the reservoir was dipping slowly below full. I found the leak in the rear brake caliper. I replaced the caliber in my garage before driving the car again. If you can fix it yourself without having to drive the car at all, that will be the best solution.

 

Exclude the model You cannot drive it until you are stationed as the main rebuilt for the component mite be out-of-state as the ecovan model was so infested with slush that flushing it to not contaminated the other under the seat in the tyre part or wea that is as carpet can cause some issue if your not sure how to make sure you inspect it , I got a product which can be over a hot day melted in to er, but I use it last cause so if you inspect having a drum issue put some tak like on all place your hands fit but not springs or things only where there is small to none gap and get your foot to the floor pedal or sensor done , maybe it will fix overnight ,without a full sensor for that it won't repair , I have a few late models and learning to use a tak such as Auto tak will save in long run or old car or modern

 

Talked to the mechanic. It was rusty brake lines

 

with this "vintage" of maximas...the brake lines are known to rust out esp rust belt area.