Hello,

I have been browsing through the forums, and have seen several people stating that the issue with the pm3 "squishy" brakes is usually caused by a bad accumulator rather than the master cylinder itself.

How would I know if this is the case?

In my TGP, the brakes have to be pushed down all the way for them to start working, and even then it takes a lot longer than it should to brake.
The brake pedal also does not return to where it should after use, so I have a 2x4 that holds the pedal out so the brake lights don't kill the battery.


Sorry for long post :p

Does your pump run every pedal press?

The pump ran constantly, that is until I took out the fuse. (I was trying to fix a short that was draining the battery)


:icon_confused:

Quote from: ShadedStrike on August 06, 2015, 03:43:36 PM
The pump ran constantly, that is until I took out the fuse. (I was trying to fix a short that was draining the battery)


:icon_confused:

By constantly, do you mean every pedal press? Or it just always runs with the key on?


It's not always an accumulator issue if the pump runs constantly. Could be the pressure switch. I believe they can be cleaned, but I don't remember the process.

Sorry for being unclear, it ran whenever the car was on.

That's either pressure switch or relay gone bad.

That would explain why the pump ran, I wonder why the brakes are so mushy though.

You likely have more than one problem.  Possibly a leak or it may need a through bleeding.  That would also cause the pump to run a lot.  But not constantly.  Are they mushy without the pump running? ( fuse removed)

(sorry for the late reply)


Yes, the brake pedal doesn't even return to its original position by itself.
(Its mushy always)

I'm actually using a peace of 2by4 in between the brake pedal and the car to stop the brake lights from killing my battery.  :icon_frown:

Sometimes you can take the rely apart & Clean the contacts to fix the problem