| Author |
Message |
John Street
DieHard
NSW
.91 V8 , 2015 VW Jetta TDI, 2009 Saab 9-3 Turbo
Posts: 566
Reg: 08-2005
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Not my post Peter |
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31
Posts: 12863
Reg: 11-2004
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John Street wrote on Sunday, July 17, 2016 - 08:50 am:Not my post Peter
D'oh.. Sorry John, I had to hand make the quote as you can't quote from Archives and I was tired and careless. |
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31
Posts: 12864
Reg: 11-2004
|
John Stafford wrote on Sunday, July 17, 2016 - 07:17 am:34R (that refers to where the positive terminal is?
Yes, the R means the terminal is on the right when the terminals are at the front of the battery - which means on the left when the battery has the terminals at the rear like ours do. |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition Subaru WRX
Posts: 1062
Reg: 02-2010
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Temp back to normal now, with new fluid, no air and new thermostat.
Now I am waiting for that new little temp sensor to get the cold start right, I still have to start it by giving it plenty of throttle and nursing it till it is warm enough to idle at 500 rpm. |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition Subaru WRX
Posts: 1067
Reg: 02-2010
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Bought a new small top temp sensor (CTS110), which for the 91 model was not just the dash gauge but the sensor for the cold start injector, and victory with regards to the cold start. Great, but not the end of the story yet, as I have to keep it going once it starts (second turn of the key, as good as it has ever been).
The problem is still with the idle itself. The IACv is not taking over with giving it a cold idle of about 1200 rpm, instead I have to keep it running at that with my foot and after less than a minute it is idling at 4 to 500 and I can let the throttle alone. It still needs me to assist the idle though to drive off.
I will change out the IACv again and then if that doesn't fix it I will try another TPs (throttle position sensor, but mine is only about 3 years old from being replace with a genuine new Toyota one). |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition Subaru WRX
Posts: 1070
Reg: 02-2010
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I put the IACv out of my newly acquired supercharged 31 and put it on my blue 31. After only a few seconds of the IACv talking to the ecu all was under control.
Problem fixed.
thanks for journeying with me. |
Dan Newton
Tinkerer
Qld
UZZ31 V8
Posts: 48
Reg: 09-2015
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Glad it's all fixed, you can go back to enjoying your car after many months of frustration! |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition Subaru WRX
Posts: 1071
Reg: 02-2010
|
Victory is sweet 
Now I am working on putting the supercharger on it. |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition Subaru WRX
Posts: 1075
Reg: 02-2010
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some new news.
I had to remove the IACv and put new bearings in it. I removed the seals and filled the bearings with silicon spray to enable them to spin very freely and on the advise of Chayton from this forum, I put the mushroom back where it was when the engine stopped. You need to put it back in its most withdrawn position. This allows the ecu to think properly. The engine started first go. I need to see if it is the same in the morning on a fresh cold start.
cheers John |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition superchaged, Subaru WRX
Posts: 1083
Reg: 02-2010
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Well the problem continues. After re reading all my posts on this to see if I have missed anything I can see that although the cold start is definitely solved the idle is NOT fixed.
I have had the IACv work some times but never more than once after changing bearings and or main motor. This has involved mixing and matching 5 different IACs. Amazing if it is a problem with the IACs themselves?
Seeing as the ecu that I tried needed a cap replaced, it was working when taken out of a car but had been in storage, so degenerated some, meaning that it can not be fully trusted. And owing to the fact that my ecu needed 2 caps replacing I am not fully convinced that the problem is not the ecu?
To this end I am asking if someone near me, north side of Brisbane, who has the right cold start and idle happening on their V8, would be so kind to allow me to drive over and swap out their ecu to see if that solves the problem.
As Winston Churchhill said in his great speech "We will never surrender".
Cheers John |
Chayton Erth
Tinkerer
queensland
soarer 4lt gt V8
Posts: 23
Reg: 01-2015
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G Day John . welcome to try my ECU if want as its working well . Was up at Cabulture on Wednesday but due to the bad weather left the visit for another day . Chayton . |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition superchaged, Subaru WRX
Posts: 1084
Reg: 02-2010
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Hi Chayton,
Thanks for the offer. I will wait to see if anyone closer offers, if not I will take you up on it. Much appreciated. Amazing long saga on this hey?
The supercharger is going great and just got the LPG doing what is it supposed to but not as quick to zoom on Lpg as on petrol but explosive when it does go.
I am attaching a Franz filter this week and looking for a good price on a catch can. Do you know anyone selling one cheap?
Cheers John |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition superchaged, Subaru WRX
Posts: 1090
Reg: 02-2010
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I spend most of the day visiting Chayton on the Gold Coast, swapping ecu (no real difference), changed TPS (thought there might have been but turned out to be no different), Changed IACv (seemed to try to work but in the end was no different to my best of 5 IACvs). Drove home 125 klms in the same shape as I went, except richer for the goodies Chayton gave my way, Soarer bits that he was looking for a good home for.
What now?? Not sure. Maybe wiring of IACv but can't find where it goes to the ecu, except the 2 centre wires.
Maybe I should cut the plug off the IACv and put another one on, just incase something is wrong there?
As for the TPS: I read on a utune video that it should be able to vary the speed of idle from dead slow in the anticlockwize position to from 600 to 1300 rpm as you turn it clockwise.
None of my 2 TPSs could give me more than one step up from dead slow. And I couldn't get the statuary 700 rpm, let alone 1300 rpm.
Any comments on this??
There was one time when we put Chaytons IACv on that the revs went to 1200 rpm on start up with the air con on, on a warm engine, in gear, and then to 1500 with the air con off and in park.
But then that situation changed and never returned. Go figure?
Now I have, with that same IACv, just 480 to 520 revs on idle in gear, up to 600 sometimes in park. Air con takes is down about 20 rpm.
Still looking for ideas.
thanks |
Dan Newton
Tinkerer
Qld
UZZ31 V8
Posts: 61
Reg: 09-2015
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Just thinking out loud here. I read through this post again and you said early on that you were losing power steering fluid. Going with this info and the idle problem it would be worth checking the power steering pumps air control valve. You'll see 2 vacuum lines heading down towards the Pump. These connect to a valve that is both prone to leaking and the plastic nipples fatigue over time and cause a vacuum leak. If any unmetered air is entering the intake manifold after the MAF you're going to have a bad time. Could be worth investigating. |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition superchaged, Subaru WRX
Posts: 1091
Reg: 02-2010
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Hi Dan,
that valve was leaking and was my first thought so I blocked it off, actually put a hose on it that went from the "in" to the "out" of the fitting but then did not know if that would compromise the system in any way, so reconnected it with the right hoses but it once again began to send power steering fluid to the throttle body.
I then took the hoses off and put a blocked hose on each of the outlets of that power steering fitting.
I am supposing that this is now out of the equation?
Thanks for thinking along with me. |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition superchaged, Subaru WRX
Posts: 1124
Reg: 02-2010
|
Back again with the same IACv problem.
I have not been able to get my failed IACv to work and have tried 6 different IACvs and 3 TPSs but still not idling to spec, Just stalls out unless I adjust the throttle stop, which cancels the right signal to the ecu so the IACv will never work.
In the end I went to Melbourne to spend some time with Peter Taplin and he tested everything with me again, all wiring and all ok but still no go. He said that we had done everything and that it had to be the ecu.
I had tried 3 ecus but without any luck and Peter explained that if my set up of the trottle stop and the TPS were not correct then regardless of the ecu it would not work as the ecu would get the wrong information.
So after a couple of hours to set up the throttle stop and the TPS, they are both to spec, set by Peter, just waiting to try another ecu now that the right signal should be going to the ecu.
There is nothing else wrong with the running of the car, only that it wouldn't idle.
What we did was to disconnect the plug to the IACv and put an adjustable clamp on the air hose to the IACv and adjusted it to give about 750 rpm idle at start up. If the IACv was working correctly this is what it would do automatically. The only issue now with this temporary fix is that the idle doesn't vary with the temp changes, like the IACv should if working properly.
I need an ecu locally so I can be sure that all is as Peter says. |
Raoul Duke
Tinkerer
Victoria
Soarer UZZ31 V8
Posts: 55
Reg: 09-2016
|
I have an IACV for sale, and a TPS from a 91 or 93 UZZ31. I forgot what year to be perfectly straight. Also have an alternator.
A few mates years ago did the Idle valve bearing replacement job and used rubber bearings instead of metal ones. IACV caused surging. Putting it back to metal bearings fixed it. Wonder if it's supposed to have a gasket, mine doesn't, and I get a surge too a few times a month. Mine happens when the gearbox is playing up though. I have a shift solenoid error and noticed that if I stop and turn off the car when it's missing 2nd gear, the car will usually start idling up to 2000rpm and bouncing around. In drive it's about 1100pm.
Might be the problem? I feel at this stage nothing is too far out there. |
John Stafford
Goo Roo
Qld.
Soarer UZZ31 GT-L V8, limited edition superchaged, Subaru WRX
Posts: 1135
Reg: 02-2010
|
Hey Raoul, If the "o" ring/gasket is missing then it may allow air in that it should not? |
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