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#1 01OBK

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Posted 07 September 2017 - 08:57 AM

Took the outback for a quick drive the other day since swapping the twin turbo in. It doesn't feel like it has and power and keeps throwing up code 66.
I cleaned and changed all the vacuum hoses in the solenoid box before the swap, did them one at a time so they're all where they should be.
I've checked the vacuum tank and it holds vacuum. Had it running in diagnostic mode and it seems to open and close everything.
Anyone got some ideas at where to start looking?
Cheers

#2 Barbbachello

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Posted 07 September 2017 - 09:58 AM

Post in here mate. The boffins will help you out
http://www.subyclub....-to-twin-turbo/



#3 duncanm

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Posted 08 September 2017 - 09:57 PM

.. hard to say.

Code 66 (if you search) seems to be caused by any number of things -- mostly mis-plumbing or the like.

some descriptive stuff here may help: https://www.scoobyne...legacy-gtb.html


I think it pretty much boils down to malfunction of something in the (complicated) vac control system.

  • no boost suggests the intake secondary relief valve might be stuck open - try blocking it and see if you get primary boost
  • check that the actuators pump back and forth in diagnostic mode (ECV and IACV) - you did this
  • check the vac tank is holding vacuum -- should be a fair bit there even a couple of minutes after the engine has been shut off - you did this

 

relief valve would be my first bet

 

also see here, which also points to busted secondary relief valve or possibly maladjusted ECV:

http://www.clubsub.o...code-65-and-66/



#4 01OBK

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Posted 09 September 2017 - 06:00 AM

Sweet thanks for that. Will have a play around with the secondary relief valve this arvo.
Also is the restrictor pill for the primary wastegate in the turbo side of the vacumm hoses or in the hose going to boost control solenoid in the wing (hose 23 iirc?)?
I replaced the hoses going to the solenoid just want to check and see if it should be there or not cause I can't remember if I put one back in or not.

#5 duncanm

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Posted 09 September 2017 - 07:13 AM

restrictor is in the line between turbo outlet and T to BCS.



#6 01OBK

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Posted 09 September 2017 - 05:00 PM

Blocked the relief valve off, made it marginally better. Still sluggish down low until the secondary comes on at around 5000-5500rpm.
But now I have codes 45 and 24 coming up
Someone tell me what the f*** is going on with this thing 😡😡

#7 duncanm

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Posted 09 September 2017 - 07:31 PM

is your primary turbo ok?

 

Wastegate shutting?

 

really can't see how it can develop less than ~7psi (wastegate) with the bypass blocked unless one of those two is rooted.

 

Only other option is the blow off valve leaking.

 

Any other (post-MAF) leaks usually lead to serious overfuelling (black smoke).

 

btw - I wouldn't worry about codes with the relief valve blocked.. they should go away when you reverse that.



#8 01OBK

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Posted 10 September 2017 - 09:43 AM

I can pull the wastegate rod by hand, doesn't take a lot of effort is that normal? It snaps shut ok tho. It is using quite a lot of fuel, used just under quarter of a tank for 15kms
Will block the blow off valve and see what happens

#9 01OBK

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Posted 10 September 2017 - 05:27 PM

Just a thought, could it be anything to do with it not having a full exhaust on atm? It's just got two 2.5in dumps pipes on.

#10 duncanm

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Posted 10 September 2017 - 06:15 PM

nah - should be fine with no exhaust.. unless the O2 sensor is missing, maybe.



#11 allpaw4

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Posted 10 September 2017 - 10:50 PM

No exhaust with oxygen sensor in will screw the sensor completely. As wear oxygen sensor is about an inch away from the open point

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#12 01OBK

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Posted 11 September 2017 - 05:38 AM

I don't have a rear oxygen sensor and can't find any wiring to plug one in. Should there be one?

#13 duncanm

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Posted 11 September 2017 - 07:20 AM

if you've got a A-C JDM, there's only one O2 sensor in the primary up-pipe.



#14 Jimbo

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Posted 11 September 2017 - 12:50 PM

Just throwing it out there, I think something is amiss inside the solenoid box. There should be a restrictor pill in line 1 inside the box.

Also, have you physically checked the turbos arent seized? The turbine/compressor wheels spin freely?

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#15 01OBK

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Posted 11 September 2017 - 04:54 PM

Yeah both turbos spun freely, I checked before I bolted them back on.
Will check for a pill in line 1, I remember putting one back in when I changed all the hoses but can't remember what hose it was.

#16 01OBK

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Posted 11 September 2017 - 05:04 PM

Just checked, there's no pill in hose 1. There is one in hose 2 tho, should hose 2 have one aswell or have I mixed them up?

#17 Jimbo

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Posted 11 September 2017 - 06:56 PM

Sorry, my bad. 

You are correct, pill should be in line #2. 

(Got confused with line #1 mod).


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#18 01OBK

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Posted 11 September 2017 - 06:59 PM

Ok sweet.
I have done the hose 1 mod too.
Are there any other pills i could of missed when I changed all the hoses across the manifold?

#19 Jimbo

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Posted 11 September 2017 - 07:53 PM

In your application, there's only one in the solenoid box (#2) and one in the little hose coming off the compressor cover of the primary, before it hits the tee.

How is your (main) BOV set up ?


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#20 01OBK

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Posted 11 September 2017 - 08:33 PM

It's all factory atm, only thing I've done is the hoses 1 mod. Was going to blank off the BOV if I get a chance tomorrow, see if that makes a difference.
I replaced the 2 intercooler hoses with silicone ones during the swap and checked the clamps this arvo and they're still tight so no leaks there.
Any other things I should check?




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