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Location:
UK
Registered:
May 2002
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1JZ low idle when cold..
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Mon, 23 August 2004 18:07
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hi all ...
My 1J idles at about 700 when cold.. has anyone got any idea what it could be?
Cheers
adi
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Location:
Brisbane
Registered:
July 2002
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Re: 1JZ low idle when cold..
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Mon, 23 August 2004 22:34
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| HedgehogSandwich wrote on Tue, 24 August 2004 04:07 |
hi all ...
My 1J idles at about 700 when cold.. has anyone got any idea what it could be?
Cheers
adi
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as far as i am aware 700 is the proper idle rpm for a 1jz
thats what I was told and set mine at.
though mine does weird bouncy rev thing when i start it lol
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 04:50
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700rpm is the factory idle at normal engine operating temp. Nothing to worry about.
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Location:
Brisbane
Registered:
July 2002
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 06:18
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mine generally does a weird bouncy idle when cold and idles at 1.1k and drops down over about 30 seconds to 700
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Registered:
March 2003
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 07:15
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If only I could get mine to idle at 700RPM.
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Location:
UK
Registered:
May 2002
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Location:
Canberra
Registered:
May 2002
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 10:16
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Adi, mate check the electrical connections at the front of the engine, one of them is a temp sender, which controls the cold start functions of the ECU.
regards Chuck.
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Location:
Brunswick, W.A.
Registered:
December 2003
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 11:53
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I'd love that, my car idles at 2000rpm when cold... I almost cry everytime I start her up 
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Location:
sydney
Registered:
March 2003
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 12:40
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could be faulty idle motor
pul it out spin the thing in middle to adjust it abit and see if it makes a difference
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Location:
Perth
Registered:
July 2003
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 12:50
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Yes - as Sideshow says it could be your ISCV.
Immediately after switching off the engine you should hear a ticking sound for a few seconds (have to listen with the bonnet up). This is the ISCV opening up for the next cold start. If you don't hear anything it may be jammed.
Regards
Peter
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Location:
UK
Registered:
May 2002
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Re: 1JZ low idle when cold..
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Tue, 24 August 2004 15:31
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okay cheers peter.. i'll give it a listen.
Is the ISCV easy to replace? A simple in out job? Also, do i need to replace it or just clean it?
cheers
adi
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Location:
Perth
Registered:
July 2003
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Re: 1JZ low idle when cold..
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Wed, 25 August 2004 00:31
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Yes - it is easy to replace although I haven't heard of anyone replacing them, just freeing them up.
Two nuts, an air hose & a small water hose in/out and it's off.
Regards
Peter
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Location:
Brisbane
Registered:
July 2002
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Re: 1JZ low idle when cold..
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Wed, 25 August 2004 04:52
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could also be fixed by something as easy as resetting ecu
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Location:
UK
Registered:
May 2002
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Re: 1JZ low idle when cold..
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Fri, 27 August 2004 12:45
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okay ..i gtno lciking when i turn the engine off. So i'm going to remove the ISCV.
What do i do to it? clean it? can i damage anything or upset any settings?
Cheers
adi
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Location:
sydney
Registered:
March 2003
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Re: 1JZ low idle when cold..
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Fri, 27 August 2004 13:13
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clean the idle motor
then this is how u reset the idle
this is for a 7m but i pressume same for 1j
run engine at 1500 revs for 5 mins
supposedly this makes the idle motor wind out and in to find its limits
do this after cleanin see if it makes a difference
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Location:
UK
Registered:
May 2002
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! not warm at normal operation temp. Ie it does it on first startup.. it idles at about 1000 for ten seconds then drops to 700 or lower, sometimes getting as low as 500. Surely it shouldnt drop to 700 until its at least warmed up a bit.