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06 G35 Coupe, soft pedal, brake failure
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ashweebradwee
New User
Sep 1, 2014, 12:37 PM
Post #1 of 8
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06 G35 Coupe, soft pedal, brake failure
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Hey guys. So I recently just bought 2006 infiniti g35 coupe about 3 months ago with ~93,000 with manual transmission.
It's an awesome car and obviously i love driving it.. But since i've had it (and honestly, i didn't really noticed too much on test drive) its had a softer brake pedal. Like often times i have to double pump to get the brakes to get a little more firm/more bite. I put new brake pads on the front and bled the front brakes. Seemed to be doing better after that but still somewhat inconsistent on when the pedal would be soft and sometimes I have to go all the way to floor for them to even slightly engage. (A little scary but pumping them would always stiffen the pedal up enough to be able to stop) Then about a month later (this was a few days ago) I was driving and the brakes completely failed. I was coming to an intersection with a red light, had downshifted all the way to 2nd, and was going about 15mph. I stepped on the brake pedal and nothing.. So i pumped the brakes and still nothing. Tried pulling the e brake, but nothing (i think my cable is stretched out, so a different problem all together). Luckily i was able to glide into a grassy area right off the turn and the car stopped. So now obviously i am scared as crap to drive it, although the brakes are back to where the previously were.. Having to pump brakes to get pedal to firm up. Seems harder to brake at higher speeds maybe?
I tried bleeding them again and flushing out the system.. But i found that there was no fluid coming out of the left rear or right front this time.. Could this be a master cylinder, the brake lines, or proportioning valve? How can I tell what the problem is? Any suggestions would be appreciated.
Thanks.
(This post was edited by ashweebradwee on Sep 1, 2014, 3:31 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 1, 2014, 1:04 PM
Post #2 of 8
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Re: 06 G35 Coupe, soft pedal, brake failure
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No offense but not you have one heck of a messed up car. No telling what got messed with to change trans from auto to manual - that and what was removed including brake parts that required re-routing or who knows and bled out which alone can wreck an older master cylinder or can leak or go at any time.
It had a pedal for a while so I say not lack of bleeding it but now something let go. Some don't show leaks some do. Master can just by-pass fluid inside itself but catch pressure with a second or more pumps. Probably a prodedure for bleeding out if you touch it at all but at least make sure fluid is properly full with proper fluid and if not find out where it went in 3 months!
T
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Discretesignals
Ultimate Carjunky
/ Moderator
Sep 1, 2014, 1:09 PM
Post #3 of 8
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Re: 06 G35 Coupe, soft pedal, brake failure
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When the brakes completely went out was the red brake warning light on or was the fluid level low? If the fluid level was good and the brakes went to the floor all the sudden, i'd suspect master cylinder. Left rear and right front share the same brake fluid circuit from the master.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Sep 1, 2014, 1:18 PM)
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ashweebradwee
New User
Sep 1, 2014, 1:39 PM
Post #4 of 8
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Re: 06 G35 Coupe, soft pedal, brake failure
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Fluid has been at the max level since i bought it and no light came on when this happened. I've ordered the master cylinder, just wanted to make sure I wasn't completely missing something.
Thanks
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ashweebradwee
New User
Sep 1, 2014, 1:41 PM
Post #5 of 8
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Re: 06 G35 Coupe, soft pedal, brake failure
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I used to have a automatic. This is a totally different car with a manual transmission. Sorry for the confusion.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 1, 2014, 1:49 PM
Post #6 of 8
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Re: 06 G35 Coupe, soft pedal, brake failure
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Highly likely when fluid is still full. Seals rip inside, catch or don't especially after pedal travel has gone to floor there could be flaws where it seals down that far the tore them.
That just to make this thing stop. Bench bleed like a maniac and be sure it's right. Bleed according to strict procedures. This imbalance of pressure when it didn't work should have warned you of a problem and didn't which is proof that car is messed up from changing out trans no telling what isn't in place or compatible with this thing now but you have to be able to stop it,
T
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kev2
Veteran
Sep 3, 2014, 11:02 AM
Post #7 of 8
(5972 views)
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Re: 06 G35 Coupe, soft pedal, brake failure
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k - Nissan was pretty standard through out the model line with ABS by 2006- What is the ABS module saying - light on any codes? for that Matter ANY codes ABS or PCM?
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ashweebradwee
New User
Sep 10, 2014, 2:24 AM
Post #8 of 8
(5938 views)
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Re: 06 G35 Coupe, soft pedal, brake failure
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Put a new master cylinder in it the other day and it seems to be working much better. The pedal was notably stiffer even just bleeding the brakes and lots of fluid came out all 4 calipers. Car can stop on a dime now @ 60mph. Seems to be fixed. Thanks guys.
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