General Chat
Q:
Subject 1.
2001 Maxima, Auto, 55k miles
As time has progressed, his car takes longer, and longer, and l-o-n-g-e-r to get out of park after being shut off. Talk about embarrasing and time consuming. No other transmission issues. I tested the brake sensor for him but otherwise no clue. The only other thing worth mentioning is you can kind of hear the drivetrain almost* shift out of park each time, because the rev's do drop slightly like they would if you do shift. No external or engine temperature relationships/correlations.
Subject 2.
2003 Honda Civic SI, 5spd, 40k miles
Turbo'd a TSX motor but blew it up and is rebuilding it, so he had a shop slap the same turbo kit back on his stock motor [obviously a new manifold though etc.]. Get this; when he is boosting and then goes to brake, the brakes DO NOT WORK. The pedal is usually rock hard and it takes a few seconds before the brakes work again. As you can imagine, this could get pretty exciting. The idiot has been driving it for about 2 months this way and has taken it to several shops that can't figure it out. A good friend of ours in houston who does his own work on his 2 skylines and a few other imports no one is familiar with [hence he is good at troubleshooting] said it's possible the vac/boost lines are somehow connected/interfering with the brake lines/pressure?!? I briefly checked all the vac/boost lines, and all of them were routed ok. And if you are wondering, the shop that originally did the work are also dumbfounded.
Any advice would be helpful, not your usual z related problems, haha.
19[TT]91
My TT beauty is gone.
2[00]2 Honda 954RR
Suzuki 1200 S; sportscar eater
19[I4]94 Integra GSR Sedan
Long live the Z...
aka SAHTT
Post Edited (Nov 15, 3:30pm)
A:
The brake booster is fed from the intake manifold. The stock system is expecting to see low pressure in the manifold due to high flow rate, but is instead seeing air at a higher pressure due to the turbo. I would guess that he is getting no vacuum assist, in fact the opposite.
-- Next Up: SCCA ITR 300ZX --
A:
does he still have his one way vac valve on the brake booster line, and if so make sure it works. your brakes should have power for a few seconds just with the vac in the booster itsself if the one way valve is working
"THOUSANDS OF YEARS AGO...."
-Ghost of Christmas Past from the Future
76, turbo
72, swap candidate
5/70, fixen to sell
my ebay auctions
http://motors.search.ebay.com/_W0QQsassZmaterchan
A:
Sounds logical, but what could you do to alleviate this and why would the TSX motor [larger 4 cyl motor] not cause the same problem with the same turbo set up?
19[TT]91
My TT beauty is gone.
2[00]2 Honda 954RR
Suzuki 1200 S; sportscar eater
19[I4]94 Integra GSR Sedan
Long live the Z...
aka SAHTT
A:
mabye he didnt put it back when he swaped motors, i donno
"THOUSANDS OF YEARS AGO...."
-Ghost of Christmas Past from the Future
76, turbo
72, swap candidate
5/70, fixen to sell
my ebay auctions
http://motors.search.ebay.com/_W0QQsassZmaterchan
A:
Prob'ly missed the check valve when swapped intake manifolds. If I understand you post right.
A:
I'm going to look into it, this is the most progress we've made yet probably.
19[TT]91
My TT beauty is gone.
2[00]2 Honda 954RR
Suzuki 1200 S; sportscar eater
19[I4]94 Integra GSR Sedan
Long live the Z...
aka SAHTT