V7 STi Brakes inconsistent?

[boon]

Howdy folks,

My V7 is misbehaving slightly.

The feel of the brake pedal is really, really inconsistent.

Often, if I haven't braked for a while, I'll get close to half the pedals travel and nothing happens, then when it does the brakes are kinda spongy.

If I lift then tap them again they're pretty firm and then if I lift and get back on them they're super firm and responsive like they used to be.

They're Brembos, obviously, with what I think are reasonably new Brembo pads all round, OEM rotors in the rear and Znoelli Slotted + Drilled rotors up front.

And just to make this a slightly tricky one, I just had them bled like 4 days ago to try and solve this issue, and they're still doing it.

Vaccuum leak? Buggered brake booster?

Ideas?

[Flat4]

Don't know much about brakes in cars but in my experience with mtb/mx bike brakes it could be a bit of air in the system? They might just need a bleed

Edit: Didn't read the post properly, my bad haha

[xsvpwr]

 boon said:

And just to make this a slightly tricky one, I just had them bled like 4 days ago to try and solve this issue, and they're still doing it.

Ideas?

[Guest]

Check for pads worn on a taper

or play in hub bearings

both of these case pad "knock off" during driving and are reasonably common faults

[shrug]

I had this issue with my wrx, it was a wheel bearing

[CUDDAS]

#1 machine rotors & replace pads.

#2 sitcking piston /'s can make a knock off feel

[Guest]

 CUDDAS said:

#1 machine rotors & replace pads.

#2 sitcking piston /'s can make a knock off feel

? why machine rotors and replace pads, ?

Diagnosis Diagnosis diagnosis .... saves a sh*t load of time and money

[Guest boostcut]

haha especially when its your wheel bearing thats the problem.

[nztintin]

hmm i have the same issue with my car but it only shows up at the track, bit scary coming to the end of the back straight at taupo and the pedal goes to the floor! found out to just left foot brake for one pump while still on the gas then change feet when i need to actually brake!

[CUDDAS]

 Ichi Ban']

[quote name='CUDDAS said:

#1 machine rotors & replace pads.

#2 sitcking piston /'s can make a knock off feel

/quote]

? why machine rotors and replace pads, ?

Diagnosis Diagnosis diagnosis .... saves a sh*t load of time and money

i thought was adding to the list of possible maybes too, was i not suppost to :-\

[Guest]

 CUDDAS']

[quote name='CUDDAS said:

#1 machine rotors & replace pads.

#2 sitcking piston /'s can make a knock off feel

/quote]

? why machine rotors and replace pads, ?

Diagnosis Diagnosis diagnosis .... saves a sh*t load of time and money

i thought was adding to the list of possible maybes too, was i not suppost to :-\

Indeed add to the list of maybe's ...

just aking why you say machine and replace parts as first option

[wrx_lou]

I get why he suggested it. It makes sense but just isnt practical for someone on a budget.

[Guest]

 wrx_lou said:

I get why he suggested it. It makes sense but just isnt practical for someone on a budget.

Isnt practical if this isnt the fault

just wastes time and money, doing the elimination diagnostics

[kamineko]

i will add i have solved many brake issues with a fresh set of wheel bearings

[CUDDAS]

 Ichi Ban']

[quote name='CUDDAS said:

#1 machine rotors & replace pads.

#2 sitcking piston /'s can make a knock off feel

Indeed add to the list of maybe's ...

just aking why you say machine and replace parts as first option

yeah i should have just left the numbers out as i was going to list down a few others, could be failing rubber brake hoses or incorrect bleeding. But i read down the thread & seen you had put check for tapered pads & simply well this was my first thoughts of that,

it's was not a procedure just options, dont really like reading the same over & over from different peeps

you had all ready stated wheel bearings, tapered pads & it may well be. Good

I thought this place was for some info

damm it's written in blue