brakes

[1995Q45havoc]

my Q has good brakes all the way around brand new front rotors and back are in good condition...when i stop from 50 mph and down i notice that my front brakes are doing ALL of the stopping ...my question is why does my back brakes feel like there not working i even bled them any advice guys on how to fix this?

[Infinitiguy19]

Well the fronts do 70% of the stopping the rears only do 30% of the stopping on the regular car/Q45. On a Q45a: Active suspenion the rear does more braking because the car stays more level.

Good and easy way to tell is to see where most of the brake dust is, if there is some on the front wheels and aboslutly nothing on the rear wheels, then your rear brakes just might not work.

If there is rust on any rotor then that caliper just might not work at all.

[maxnix]

In Tampa, you need new fluid every two years to keep MS and ABS system from deteriorating. How fresh have you kept yours?
Modified by maxnix at 8:42 AM 3/22/2009

[1995Q45havoc]

i jst did a powersteering flush brake fluid and transmission im guessing that my back calipers maynot work because all my dust is on my front rims

[bullittandy]

I don't think you have confirmed that the rear brakes do not work. Rear brakes do very little work compared to the fronts. You could measure the stopping distance from 60 MPH and compare to new.
Modified by bullittandy at 5:29 AM 3/22/2009

[Q45tech]

Unfortunately almost all tires do not comply with OEM fast wear specifications [160-200 treadwear index] so impossible to meet oem brand new 129 feet from 60 mph...........data log a panic stop and count the front vs rear ABS cycles.

You didn't say whether pads and rotors are OEM or aftermarket?

[1995Q45havoc]

pads are oem and rotors to...when im doing 50 or faster an try to stop i feel the front vibrate an you can feel the front slam down gard that expected..is it worth to rebuild them or just bye new ones

[bullittandy]

You have to edit your posts in order to get good answers, correct spelling, syntax etc etc.

Sounds like you have several problems at once, start with a complete and acurate description of the problem(s) and we'll help.

[oldmako]

"What we have here.........is a failure to communicate"

Name that movie. (this is an easy one.....so to make it mo' betta', name the actor AND another movie that he made with PN......hint, it's a classic sports flick.)

[maxnix]

When did you last replace your shocks?

Does your parking brake work?

Did you measure your hub run out and/or true your rotors before mounting?

Please do be more careful in your posts as all searches are performed in English. It's a courtesy to members and future searchers, just as the members and former posters were courteous to you.

[1995Q45havoc]

sorry about the miss communication everyone with my typing...my problem is my back brakes are not working like they should even after i bled them...when i stop from speeds around 50 and faster my front brakes feel as if there taking more of the work load like the back calipers dont work..should i rebuild those back calipers or should i just RR them.

[Infinitiguy19]

You can rebiuld them yourself for $7 if you buy the caliper repair kit from Joe at Infiniti of Scottsdale or a dealer near you.--Labor costs more than parts. 2 hours work MAX

Or you can buy 2 brand new calipers.--parts cost more than labor. 1 hours work MAX.

[bullittandy]

sorry about the miss communication everyone with my typing...my problem is my back brakes are not working like they should even after i bled them...when i stop from speeds around 50 and faster my front brakes feel as if there taking more of the work load like the back calipers dont work..should i rebuild those back calipers or should i just RR them.

If the rear brakes are actually not working then the problem is:-a fluid leak-air in the lines (most likely since you opened them up to bleed them)-super hard rear pads

[jimbyjimb]

Are you positive you bled them completely? Did you bleed the ABS unit also? Can you make the rears lock up/ABS actuate in the rear? Nose dive is normal under hard braking, especially in a car with a soft suspension. Consider a re-bleed, maybe do all 4 and ABS unit to be safe. Never hurts to flush out some old fluid.