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Location:
UK
Registered:
May 2002
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1JZ autobox.. help .
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Tue, 04 March 2003 16:38
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I have a 1JZ JZA70 with A342E gearbox, and cannot powerlaunch, cannot spin the rears and get appalingly slow starts. At first i thought i had a gearbox fault , but i am now looking at the possibility that the gearbox ECU is doing something to the engine on takeoff(to allow for smoother launches). The basis for this is the fact that on a lauch, or when raising the revs with my foot on the brake i *cannot* make any positive boost.. my gauge reads *exactly* 0 psi at 2400 revs with my foot on the brake... meaning no positive boost, no powerlaunches, no quick takeoffs and no rear spinning wheels.
Engine and turbo are fine and im certain everything is as it should be.
So.. do any of the A34*E series retard the ignition or prevent the engine from making boost in the primary stages of a launch? Is this why iget such appalingly slow starts? Can there be another reason? Couldii have poor line pressure to the box? What can i do?
DOES ANYBODY HAVE AN A342E !!!!!!???????? DOES IT DO THE SAME ???? AM I THE ONLY PERSON IN THE WORLD WHO HAS EVER QUESTIONED THIS BOX? HELP !!!!!!
Sorry to shout, but ive been searching for info on this box for over a year, and come up with absolutely nothing. I've tried Toyota UK, loads of import places, japanese sites, Toyota JP.. the list goes on. Info on this box is *IMPOSSIBLE* to find, and believe me ive tried... and before anyone says its just an A340E with different ratios.. it isnt. I just want to find out if i have a problem. Should i be able to spinthe rears whilst power braking? Should i be able to make positive boost whilst powerbraking? Is everyones lauch with this box so slow?
Please help !!
There is a video of my dash during a launch at
http://www.jzasupra.com/supra2.avi
You can see how long it takes to get to 30 and how it suddenly hooks up afterwards (i back off about 80). I have hybrids but cannot put the problem down to this as it was the same on standard turbos. Oh, and its running 100% T-IV.
adi
1992 JDM JZA70 'limited'
[Updated on: Tue, 04 March 2003 16:39]
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