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Andrew Ferres
Goo Roo
WA
'89 Crown Wagon V8, '84 Soarer V8

Posts: 1314
Reg: 07-2005

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Friday, August 12, 2011 - 09:54 am, by:  Andrew Ferres (Peewee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Mario Lentini wrote on Thursday, August 11, 2011 - 09:17 pm:

Hi Guys , you can run the pre 94 IACV on your engine , I have had a 91 Idle Valve on my 94 for a few years now and not a problem .



Surprising you say that.
I tried to run one of the non-rebuildable ones (no idea what year it was from) on a 1990 ECU, and the car wasn't happy.

Took it off and compared it (electrically) to a rebuildable one, and they acted differently.

Put the rebuildable one on the car, and the idle was sweet.
Mario Lentini
TryHard
Queensland
UZZ32 V8

Posts: 245
Reg: 07-2005

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Saturday, August 13, 2011 - 05:50 pm, by:  Mario Lentini (Lexus94) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thats interesting Andrew , I have been running mine for years now and about 3 weeks ago our 95 LS400 had a high idle and thought it maybe the ICV so again pitted a spare off a pre 94 and it ran fine , still have a a bit of a high idle but not a problem other than that .
Mario Lentini
TryHard
Queensland
UZZ32 V8

Posts: 246
Reg: 07-2005

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Saturday, August 13, 2011 - 05:51 pm, by:  Mario Lentini (Lexus94) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I maybe wrong but see if you can get a lone of one Nik and try it to see if it will run .
Nik Peacock
TryHard
Tasmania
V8 6 Speed Manual

Posts: 159
Reg: 05-2006

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Saturday, August 13, 2011 - 06:19 pm, by:  Nik Peacock (Niko) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I'm on the lookout for one Mario, however it looks like I also have a fuel pump on the way out so that is probably having an effect as well, so I have a walbro to install next weekend and I lashed out and ordered a new fuel pump ecu from ama yaya as well
Brett Harrison
DieHard
QLD
JZZ30

Posts: 751
Reg: 09-2005

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Sunday, August 28, 2011 - 11:04 am, by:  Brett Harrison (Bretto) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Nik, Does the idle get worse when its cold or hot ?

When running maffless on a post 94 engine, mine will idle fine when cold, but once warm the lumpy idle returns ?? Any ideas

Brett
Nik Peacock
TryHard
Tasmania
V8 6 Speed Manual

Posts: 164
Reg: 05-2006

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Sunday, August 28, 2011 - 02:33 pm, by:  Nik Peacock (Niko) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Idles like a pig when cold but when hot it's ok most of the time just sometimes a bit lumpy, I have replaced the fuel pump with a walbro and there is a small improvement, I'm just waiting on a new fuel ecu from Daniel and see how that goes, my suspicion is that it's not so much the iacv now but the tune, I'll need to get on the boat and go see Cihan
Brett Harrison
DieHard
QLD
JZZ30

Posts: 752
Reg: 09-2005

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Sunday, August 28, 2011 - 04:56 pm, by:  Brett Harrison (Bretto) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Nik,

Have you still got your AFM ? would it be a big deal for you to plug that back in just for diagnostics purpose ? So if the idle is fine, you can probably tune that out. Would indicate other parts of the system are also ok, and save you time and money changing parts that are ok. How was the idle before removing the afm ?

Like I have mentioned before, testing on both pre 94 engines, and post 94 gave different results with afm disconnected. 92 engine behaves totally normal, idle etc, post 94 becomes lumpy. Now I'm wondering if something in the electronics has change between the years to cause this.

I would be really interested to see how yours idled with the afm back on, only for diagnostic purpose, of course no intention of leaving it there.

Brett.
Nik Peacock
TryHard
Tasmania
V8 6 Speed Manual

Posts: 165
Reg: 05-2006

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Sunday, August 28, 2011 - 07:44 pm, by:  Nik Peacock (Niko) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

It was fine with the mafless tune but I had a bit of a retune it was fine after that but has progressively become worse
Brett Harrison
DieHard
QLD
JZZ30

Posts: 753
Reg: 09-2005

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Monday, August 29, 2011 - 04:38 pm, by:  Brett Harrison (Bretto) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Ok, was under the opinion that you always had the problem.

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