Oil in the ECU // JDM ECU compatibility

Posts specific to the 2.0 litre Turbo engine

Oil in the ECU // JDM ECU compatibility

Postby ben#986 » Sat Jan 17, 2015 2:16 pm

This week our liberty gt went into limp mode with a DBW CEL (P02xx).

It was towed to S&J Automotive where they ran through the usual checks, cleaning plugs, trying a replacement throttle body actuator and pedal, etc etc.

After a couple of hours cleaning, testing etc, they went to replace the ECU with a spare. When unplugging the ECU, oil (literally) dripped out of the plug. Oil vapour had been sucked through the loom from the exhaust AVCS cam to the ECU.

They cleaned it up, installed an 06 gt ecu and the car has been running like a dream since.

This was the first time they'd seen this issue, and it's the first time I've heard of it happening.

I'm now on the hunt for an 04 gt ecu (5EAT), stock or tuned for intake and 98. If anyone has an ecu they want to sell, let me know.

Also, can anyone tell me if a JDM ECU would plug and play? I hear they have a more aggressive tune which would be nice out of the box. yahoo japan has a couple of cheap ones.
ben#986
 
Posts: 34
Joined: Wed Apr 27, 2011 11:52 pm
Location: Adelaide, SA
Car: MY04 Lib GT Wag + MY01 WRX
Real name: BH

Re: Oil in the ECU // JDM ECU compatibility

Postby HardwareBoB » Sat Jan 17, 2015 2:58 pm

What's wrong with the ECU in it? also - just get a tune, don't swap ECUs to get a tune!
User avatar
HardwareBoB
 
Posts: 1567
Joined: Fri Sep 13, 2013 11:52 am
Location: Melbourne
Car: MY05 GT 5MT Wagon
Real name: Matt
Profile URL: viewtopic.php?f=10&t=27514

Re: Oil in the ECU // JDM ECU compatibility

Postby ben#986 » Sat Jan 17, 2015 7:59 pm

The ecu that was pulled out wasn't working. The ecu in it at the moment is fine, but it's a loan unit. I need to track one down to keep.

The old ecu was tuned for the car. The new one doesn't have to be tuned but it would be handy if it was.

I'm looking at a jdm ecu because they're cheap.
ben#986
 
Posts: 34
Joined: Wed Apr 27, 2011 11:52 pm
Location: Adelaide, SA
Car: MY04 Lib GT Wag + MY01 WRX
Real name: BH

Re: Oil in the ECU // JDM ECU compatibility

Postby dr20t » Sat Jan 17, 2015 9:00 pm

How did they install a new ecu and get it working without rekeying your immobilizer, key fob and biu?

Jarrod has a manual ecu for sale (cheap) in the for sale section which will work you just need to flash the 5eat rom into it

Mick
Addicted to corn juice....

My FrankenStien build thread here: viewtopic.php?t=14137
User avatar
dr20t
 
Posts: 4184
Joined: Sun Oct 23, 2011 10:43 pm
Location: South West Sydney NSW
Car: 04 Liberty GT Auto
Real name: Mick
Profile URL: viewtopic.php?t=14137

Re: Oil in the ECU // JDM ECU compatibility

Postby ben#986 » Sun Jan 18, 2015 10:24 am

Cheers dr20t. I tried searching for ecu in the for sale section but the search failed (why have a minimum character length for searches?).

The key etc was recoded to the new ecu.
ben#986
 
Posts: 34
Joined: Wed Apr 27, 2011 11:52 pm
Location: Adelaide, SA
Car: MY04 Lib GT Wag + MY01 WRX
Real name: BH

Re: Oil in the ECU // JDM ECU compatibility

Postby dr20t » Sun Jan 18, 2015 10:27 am

ben#986 wrote:Cheers dr20t. I tried searching for ecu in the for sale section but the search failed (why have a minimum character length for searches?).

The key etc was recoded to the new ecu.


Here you go:

viewtopic.php?f=68&t=28307
Addicted to corn juice....

My FrankenStien build thread here: viewtopic.php?t=14137
User avatar
dr20t
 
Posts: 4184
Joined: Sun Oct 23, 2011 10:43 pm
Location: South West Sydney NSW
Car: 04 Liberty GT Auto
Real name: Mick
Profile URL: viewtopic.php?t=14137

Re: Oil in the ECU // JDM ECU compatibility

Postby ben#986 » Wed Aug 12, 2015 11:37 pm

Update!

I bought a JDM ecu for $60 off yahoo japan through jesse streeter. It arrived in about a week from purchase. It was fitted and recoded with no issues.

However, it's 8 months later and the oil is back more than ever. After the last time, S&J unwrapped most of the loom in the footwell to minimise the chance of oil going to the ecu again, but now my passenger footwell has oil in it and my car is in limp mode.

It looks like there is a few tablespoons worth of oil sitting below the ecu.

I've opened the ecu and it doesn't seem to have any oil in it, so i'm using brake cleaner (then contact cleaner) to clean the loom and connectors a bit.
ben#986
 
Posts: 34
Joined: Wed Apr 27, 2011 11:52 pm
Location: Adelaide, SA
Car: MY04 Lib GT Wag + MY01 WRX
Real name: BH

Re: Oil in the ECU // JDM ECU compatibility

Postby dr20t » Thu Aug 13, 2015 7:37 am

That is so bizzare.

The only way I can think of oil getting to your ecu is through the avcs solenoids / ocv valves. These feature a mechanical to electrical connection at the plug (and are often oily at the plug when going bad / worn). The shielded wire in the loom for the avcs might be weeping and thus allowing oil back to the ecu.
Addicted to corn juice....

My FrankenStien build thread here: viewtopic.php?t=14137
User avatar
dr20t
 
Posts: 4184
Joined: Sun Oct 23, 2011 10:43 pm
Location: South West Sydney NSW
Car: 04 Liberty GT Auto
Real name: Mick
Profile URL: viewtopic.php?t=14137

Re: Oil in the ECU // JDM ECU compatibility

Postby jslayz » Fri Aug 14, 2015 1:30 am

dr20t wrote:That is so bizzare.

The only way I can think of oil getting to your ecu is through the avcs solenoids / ocv valves. These feature a mechanical to electrical connection at the plug (and are often oily at the plug when going bad / worn). The shielded wire in the loom for the avcs might be weeping and thus allowing oil back to the ecu.


This is correct. I have 600 worth of cam position sensors on the way from japan.....still waiting..... to fix this exact issue.
CURRENT - ATP GTX 3576 - 22psi - 283.7awkw
OLD - Dom 1.5Xtr - Last dyno 254ahkw, previous 238ahkw, first 224awkw.
My journey thread: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523
My Lib Pics here: http://forum.liberty.asn.au/viewtopic.php?f=10&t=15523&start=570#p370656
User avatar
jslayz
 
Posts: 2810
Joined: Tue Mar 09, 2010 11:32 pm
Location: Perthhhhhh
Car: 2005 Liberty GT Wagon
Real name: J

Re: Oil in the ECU // JDM ECU compatibility

Postby lucasryanmartin » Sat Nov 07, 2015 6:07 pm

It's going to keep happening until you find and fix the cause of the issue, most likely from where a sensor is open to oil pressure. As the harness warms up the oil is warmed within it, pushing its way around. I would be replacing the entire engine harness aswell.
lucasryanmartin
 
Posts: 20
Joined: Mon Sep 15, 2014 10:20 pm
Car: 2004 Liberty GT


Return to 2.0T engine specific

Who is online

Users browsing this forum: No registered users and 2 guests