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Michael Wittwer
TryHard
South Australia
TT with HKS T3Gs, R154 and a Torsen making 300rwkw and pov pack V8

Posts: 366
Reg: 09-2010

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Wednesday, April 12, 2017 - 10:32 am, by:  Michael Wittwer (Michael_wittwer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi All,

Need some help, I have a v8 uzz31 with an issue once the car is warmed up. When I start the car, everything is fine, put the car into drive / reverse no issue. When the car has warmed up, it idles fine in park / neutral, but when I put it into drive the revs drop to about 500 rpm and the car sounds like it is going to stall and will not move under its own power.

I have had the ECU refurbished, new plugs, igniters, leads, distributors, drained the fuel tank and put fresh fuel in.

I thought it could have been a trans issue, but its fine when cold in drive or reverse.

I need some help guys if anyone has any ideas. Thanks in advance
Tom Richards
Goo Roo
nsw
V8

Posts: 2324
Reg: 08-2005

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Thursday, April 13, 2017 - 06:49 am, by:  Tom Richards (Tomr) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

coil near the AC compressor
Michael Wittwer
TryHard
South Australia
TT with HKS T3Gs, R154 and a Torsen making 300rwkw and pov pack V8

Posts: 367
Reg: 09-2010

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Thursday, April 13, 2017 - 10:38 am, by:  Michael Wittwer (Michael_wittwer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Sorry I should have added that to list, I have replaced both coil packs, could there be a problem with the connector? The other thought I had could it be a fuel supply problem / bad sensor due to it only being a problem when it is warm?
Brett Harrison
DieHard
QLD
JZZ30

Posts: 967
Reg: 09-2005

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Thursday, April 13, 2017 - 02:06 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)

Michael, disconnect the plug on the Air flow meter and tell me what it does once warm. Also have you replaced the ecu temp sensor, green one.
Michael Wittwer
TryHard
South Australia
TT with HKS T3Gs, R154 and a Torsen making 300rwkw and pov pack V8

Posts: 368
Reg: 09-2010

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Thursday, April 13, 2017 - 06:21 pm, by:  Michael Wittwer (Michael_wittwer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I have disconnect the airflow meter, made no difference, haven't replaced the ecu temp sensor.
Michael Wittwer
TryHard
South Australia
TT with HKS T3Gs, R154 and a Torsen making 300rwkw and pov pack V8

Posts: 369
Reg: 09-2010

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Friday, February 09, 2018 - 04:55 pm, by:  Michael Wittwer (Michael_wittwer) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Turns out the refurbished ECU was faulty, had a spare one and no issue.
Roland Elliott
TryHard
New South Wales
uzz32 1uz-fe

Posts: 286
Reg: 08-2014

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Saturday, February 10, 2018 - 12:16 am, by:  Roland Elliott (Aussie2013) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Seems to be a lot of so called Re-furbished ECU's failing , I have heard of 3 just this week, wonder who claims these are re-furbished when they obviously are not, otherwise they should last at least 20 years + .
Ilya Ali
Tinkerer
Brunei Muara
V8

Posts: 15
Reg: 11-2014

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Saturday, February 10, 2018 - 01:22 am, by:  Ilya Ali (Ilya_ali) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

or it could've been something else that went bad that wasn't replaced during the refurb?
Roland Elliott
TryHard
New South Wales
uzz32 1uz-fe

Posts: 287
Reg: 08-2014

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Saturday, February 10, 2018 - 04:24 am, by:  Roland Elliott (Aussie2013) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

From my experience with them nothing else goes wrong.
Mike Beck
Goo Roo
New Zealand
3UZ-FE V8 4.3 UZZ32

Posts: 6175
Reg: 11-2005

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Wednesday, February 14, 2018 - 01:20 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Likely some residual leakage hiding in the ECU under parts that's spread around and contaminated other circuits.

Had that happened to a couple I've fixed a while back, learned what to watch out for.
Roland Elliott
TryHard
New South Wales
uzz32 1uz-fe

Posts: 291
Reg: 08-2014

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Wednesday, February 14, 2018 - 03:54 pm, by:  Roland Elliott (Aussie2013) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I always clean mine with Isopropyl and crc contact cleaner, then bake in oven for 30 min or so at low temp. spotless and less all contaminations and moisture. Then I run them up loaded while looking over them with infra temp scope to find any hot spots that should not be there, this also finds any bad solder joints.
Mike Beck
Goo Roo
New Zealand
3UZ-FE V8 4.3 UZZ32

Posts: 6177
Reg: 11-2005

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Saturday, February 17, 2018 - 01:51 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Oven baked. Sounds like a delicacy!

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