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Location:
Melbourne
Registered:
January 2003
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 technical 1UZ-FE questions
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Sat, 12 April 2003 05:30
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firstly just some questions regarding wiring for a 1UZ-FE
(or any car really i guess)
i got a Crown half-cut and am going to be running it stock with stock gearbox but i am taking off the traction control, cruise control, ABS, A/C...
1. my questions are, with the wiring side of things to wire it up without traction control...what exactly do i need to put in place of the traction control ecu so the car won't run in limp mode...like does the wire need a certain voltage sent to it or something??
2. same with cruise control...as it has an ecu as well...can i just cut the wire?
3. does ABS have any wiring that is included on the engine/gearbox side of things?? if yes, what and where?
also the same question as above..
4. with the stock fuel pump being set-up to run on 9V or 12V, does that mean i'd be best to get pump that can do this (or can all pumps do it)??
or can i just buy any pump?
5. what is the "exhaust control flap"?? 
that's it, anything else i should be aware of?
thanks
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Location:
Montrose, VIC
Registered:
May 2002
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Re: technical 1UZ-FE questions
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Sat, 12 April 2003 07:17
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With the wiring side of things, I'll hopefully be able to tell you soon - I'm taking on the very same challenge this week probably with a Crown V8.
The multi speed fuel pump is there to stop excessive heating of the fuel - up to you if you use it or not.
Exhaust control flap - I THINK that can be safely ignored!
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Sun, 13 April 2003 08:21
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i look forward to the answers! 
don't wanna get it all wired up and end up having the traction control thinking that it has to slow the wheelspin down! 
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Location:
ACT
Registered:
July 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 04:54
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- You can just cut the wires. This should run fine.
- Same as above
- I pretty sure you can just cut the wires. I will have to check my wiring diagrams to be sure.
- If you want to you can use some relays to switch in/out the resistor which drops the voltage to the fuel pump. Not really necessary. The resistor would cost a fair bit and its value will depend on which fuel pump you have. Not worth the effeort IMHO
- Don't worry about it. Its just there to help stop noise by creating back pressure. It opens up when you plant the right foot.
Don't cut any wires which go from the ECU and ECT to the engine and transmission. Remeber to keep the shift plate which locks the shifter in place. I did and I had to make a new one.
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 05:31
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thanks again KDog!
some ppl told me just to make sure that the TRC and ABS will not be in an "active" state if i "just cut em off" as this will retard my ignition to slow me down....don't want that do we!!
good to hear that i should be able to just cut them, easy!
another easy question while the topic is going....at the front of the inlet-manifold there are two hoses coming out...
i think one goes to the air-intake-piping, and the other goes to the power steering pump.
now i think these are just vacuum hoses yes? and since i am not running power steering, i should just be able to unplug the hose from the power steering pump and leave it just dangling (so it looks as if it goes somewhere but it won't really! ) and it won't cause any problems...yeah?
thanks,
Aaron.
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Location:
ACT
Registered:
July 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 06:09
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If you really want to make sure you can leave them wired up. But then you would have to apply power to them. I've never had problems with cutting them off.
Yeah the power steering vac line just increases your idle speed when the car is at full lock. To give the power steering pump a bit more pressure. I think it only increases the rev by about 50rpm so it not really needed.
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Location:
Brisbane
Registered:
May 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 06:11
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Actually its function is to prevent the engine from stalling when the P/S pump suddenly loads up, eg when you hit full lock. Definitely a handy feature to keep if you can.
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 06:36
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but i'm not running power steering.....
pffttt! that is just another pointless feature that adds another power draining pulley to the engine! 
so by having this hose just going to the atmosphere....that isn't going to make the engine idle that little bit higher is it?
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Location:
Brisbane
Registered:
May 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 07:22
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I'm not running P/S at the moment, so I just joined the two hoses together. You could also block them off if you want.
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 07:27
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so does that mean i can't just let it go out to the atmosphere??
like, would it be best to block it off with something, or could i just leave it with nothing there? 
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Location:
Sydney
Registered:
May 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 07:31
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cant you just take the ps off? completely?
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 07:44
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yeah, that's what i'm doing....we all know a power steering pump and all the parts and fluid is just unnecessary weight!
but it's left me with a spare vacuum hose that used to go to it.
do i a) "plug it up"
or do i b) "leave it with a hose going nowhere"
alright, MORE questions...to everyone who has worked with a Crown half-cut..
how did you manage to unplug all the plugs going to the engine while it was still in the half-cut so that you could take it out??
we have pulled off ALMOST every single plug that conects the loom to the engine so we can take out the engine but there is like 2 or 3 plugs at the very back of the engine that go down sort of on the drivers side....can't get to them at all!!
one of them seems to be covered in foil?? and we can't see where it goes.. 
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Location:
ACT
Registered:
July 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 22:39
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Go with option "A"
Its easier to disconnect all the wiring from the ECU side and pull this into the engine bay. To disconnect all the wiring on the engine you will need to pull the intake plenum off. This is so you can get to the knock sensors, cold start injector, starter etc. You will also need to pull the wiring harness out of the plastic covers it sits in. This is usually difficult to do without destroying something. This is why its easier to do it from the ECU side. Usually when I am doing engine conversions I rip the engine out and remove all the wiring with the engine out. Then put the new wiring on the engine whilst its out and then put it into the car. Its saves a lot of time/money in the end, plus it ends up being much neater dues to the easier work environment.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: technical 1UZ-FE questions
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Mon, 14 April 2003 22:45
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Yes.. unplug the ECU side of things.. MUCH easier!!
Also, anybody got their Crown brake rotors lying around??
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Tue, 15 April 2003 05:20
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okay thanks...
my Crown still has it's rotors on it....300mm i think they are, fair big, but they are rusted (surface rust only?) big time..
still on the half cut atm as it's sitting on some wheels! 
as you can see they look pretty sh*tty..
calipers have been chucked out alreday.
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Location:
c'town, NSW
Registered:
May 2002
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Location:
Melbourne
Registered:
January 2003
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Re: technical 1UZ-FE questions
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Tue, 15 April 2003 06:06
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nup, i'm not using them, or the discs..
i posted them up on a few for sale boards and no-one made offers so they went.
sames gonna happen to all the rest! hehe
please, if anyone might need anything from a left-over Crown half-cut being used for an engine transplant, check the for sale pages and look for the Crown post by me.....before it all goes to the tip!!
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