R32 Abs

[pipster11]

hey guys

had a leaking abs unit in my 32 and swapped it out for one from a gtr

lines all matched up nicely and everything but i'm not 100% convinced that its working

when i turn it on it sounds like its priming itself (never did this before)

and i think i am able to still lock the brakes up (hard to lock them with good pads and 18 inch chromies)

So, does anyone know if the are compatible or if i have to change anything to get it to work propperly?

(or have the propper bleed procedure for it?)

Thanks

Tom

[pipster11]

no one can help?

quickly loosing interest in sau

not a great deal of knowledgeable ppl it would seem

[blind_elk]

I had a similar failure. I believe the unit was replaced with a GT-R unit; no problems with the operation of ABS.

You are more likely to lock the wheels with good pads, and I would expect "chromies" would make no difference. Why do you want to lock the brakes anyway? I rarely activate the ABS on mine, even during spirited driving.

Just bleed them in the normal course of events; I usually leave the ABS unit until last.

[pipster11]

ok must be in my head then

also brakes only lock up when there is to much pressure in 1 point instead of a distributed load that causes the pad to grip (this is what i read)

good brakes should be able to pull up much harder without locking

just got a cm or two of slack b4 the pedal goes hard

but it is apparently normal with the abs

[Merli]

no one can help?

quickly loosing interest in sau

not a great deal of knowledgeable ppl it would seem

Yup.

Don't get a reply to your thread after 3 days, so you insult the people you are asking help from.

Way to go, champion

[pipster11]

sorry

used to boost where you get a half inteligent reply after a day at least

not to be smart

but check all my topics

there are about 8 that have had no replies

i put up plenty of info and yet i get no replies

just saying its pretty annoying

[sav man]

did you bleed the abs unit? the better the brakes the easier it is to lock the wheels.

All you need to do to test it is get the car to 80-100, and stamp on the brakes. You should feel the abs through the pedal, and you should be able to hear the unit pumping. if the abs isn't working you'll get none of that, and you'll pull up in a cloud of tyre smoke.

[pipster11]

yeah i know what abs feels like

and kinda re bled the abs unit but i didn't have any hose and was just doing it with a rag and only a couple of pumps cos it was making a mess

couldnt see any bubbles coming out tho but will attempt it again when i find some tubeing

does anyone have a definitive procedure to bleed the mofo?

car on? car off? battery disconnected? either one first?

would love to get rid of the squishyness

[Merli]

So what happens if you get the car up to 100km/h and stomp (and I mean STOMP!!!!!) on the brake?

[sav man]

i've alway blead it with the car off, get someone in the car, get them to push on the brakes, and you open the valve. when he gets to the firewall close the valve, then he lifts off the brake. Rince and repeat, till there is no air.

order to do it is LR, RR, LF, RF, ABS R, ABS F. If all of that makes sence. And don't forget to keep topping the master cylinder up.

[pipster11]

yup no worries

had a guy of the tassie section help me do it when i upgraded to slotted fronts (and fluid was in a bad way and the abs was leaking too so that got changed)

we did it the same but with the abs first and no order of pref on the order of lines for the abs unit

will bleed again (just abs first) and see how i go

Merli, im not sure what happend cos its been a while but will try on a quiet road tonight and let you know

thanks for the help guys

[pipster11]

bit of a long reply

but...

bled the abs unit again (few tiny bubbles in there)

made no difference at all to pedal length (the length of the soft bit)

was doing 80 on a wet road

STOMP!!!

and the fronts just locked and slid

i think the left locked first tho (but only just)

also

sometimes when braking hard i can hear a grating noise (is this common with slotted rotors?)

[sav man]

no abs fault light? does the abs light work when you first turn the key on?

[pipster11]

is the abs light just the normal brake light/handbrake light?

if so yes for both handbrake and low fluid

if there is a separate one for abs then no it does not come on

[sav man]

i havn't seen a abs eqipped gtst to know, but a lot of abs cars have a light just for the abs system.

[pipster11]

hmmm

i'll shine a light on the dash and see if i can see an abs light

is there any way to run a diagnostic without a consult thingo?

what do gtrs have?

[emtea]

what do gtrs have?

32 GTR's have a yellow warning light for the ABS... It's with the left hand side warning lights on the top left of the 4 lights there.

Mine lights up on ignition but goes out very quickly - not sure if that is normal operation or not...

Can anyone tell me if the warning light comes on during activation of the ABS?

[djr81]

No it doesn't. You should be in no doubt as to whether the ABS works or not. You feel the pedal pulsing & as often as not hear the thing working.

Find yourself a gravel road & hit the brakes....

[sav man]

the abs light is there to tell you when it's failed. and it comes on when you tuen the key to test that the light works

[emtea]

No it doesn't.

Didn't think it did come on, but thought I'd check.. I have recently replaced my ABS unit as well... Gave it one test, and felt the peddle pulse...

No thanks on the gravel road, suspension is harsh enough on normal roads