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-   -   Here's a doozy (http://legacygt.com/forums/showthread.php?t=200781)

CaptainGVT 01-31-2013 10:19 AM

Here's a doozy
 
So, this will be a bit long-winded... but it is one that I cannot solve on my own.

I have a boxed frame specialty car constructed from a 2005 Subaru Legacy GT turbo with an EJ255. The original wiring loom was removed from the donor car, as was the front transaxle and running gear. The rear prop-shaft on the donor car was removed and the AWD system was essentially removed and blanked off. So, the engine, gearbox, and front transaxle were then removed from the donor, and inserted into my custom mid-engined toy.

So far- so good.

Since the engine was from a donor car with xxxx miles, I decided to build a new EJ255 and use the existing harness, ECU, etc. for it. Since then, I have the new engine, plumbing, turbo, electronics, etc hooked up and installed in the new ride- but am not getting fire.

I have checked and replaced: Cam Sensor, Crank Sensor, fuses, and still no fire. I have laid grounded a plug on the car and turned it over looking for fire- and there's nothing there.

I am thinking immobilizer, but don't know what to look for, where, etc. I read something about a Body Integration Unit online, but don't know what it looks like either, or how to trouble shoot past where I am now. I am pretty much a lost cause and getting discouraged by the day.

Any ideas, descriptions of what to look for, photos, or anything would be nice at this point. I have run out of ideas and am sure it is something simple... I just can't find it.

Top 10 reasons for not having fire that I have not checked??? Is there a way to test the immobilizer/reset it/replace it?

SBT 01-31-2013 06:49 PM

With the 2005+ LGT, the immobilizer would be the primary reason for non-fire. If you don't have the key that's matched to the ECU, then it's a non-starer, no pun intended.

Recommend you just get a stand-alone EM system and call it a day. Getting all of the other bits, i.e. encoded/matched key, BTS, etc., will make this a difficult project. Only Subaru techs, with a Subaru Select Monitor can encode/match the key to the system.

frank_ster 01-31-2013 07:06 PM

Yea go stand alone like megasquirt or what ever

Otherwise you need everything from the car the key the body inter grated unit and the reciever for they key and maybe a few more things

Max Capacity 02-01-2013 05:59 AM

Listen to frank_ster he knows what he's talking about.

frank_ster 02-01-2013 06:31 AM

how did you lock the center differential?

Nolmers06LGT 02-01-2013 07:50 AM

:needpics:

CaptainGVT 02-01-2013 10:34 AM

FYI- I have put over 5000 miles on the car with the old engine, and setup. It works, or should I say- worked with all the old wiring harness, ecu, biu, etc. Why would it not work now? The key, switch, etc are all from the orig. donor car and are matched. I did have a shut-down with the old engine during a torrential rainstorm- just absolutely died and had to tow the car home. A day later it started no problem. That issue was never diagnosed, as it never happened again. Could it be the same problem??? It had no fire then either.

If I go stand alone, will I lose ABS, OBDII potential, and emission compliance that I have now?

More???

I am not sure if this will work- but I threw a few photos of the build:
http://356legacygt.shutterfly.com/

frank_ster 02-01-2013 11:16 AM

Quote:

Originally Posted by CaptainGVT (Post 4273713)
FYI- I have put over 5000 miles on the car with the old engine, and setup. It works, or should I say- worked with all the old wiring harness, ecu, biu, etc. Why would it not work now? The key, switch, etc are all from the orig. donor car and are matched. I did have a shut-down with the old engine during a torrential rainstorm- just absolutely died and had to tow the car home. A day later it started no problem. That issue was never diagnosed, as it never happened again. Could it be the same problem??? It had no fire then either.

If I go stand alone, will I lose ABS, OBDII potential, and emission compliance that I have now?

More???

I am not sure if this will work- but I threw a few photos of the build:
http://356legacygt.shutterfly.com/


megasquirt you will be able to get rid of 90% of the wires.
do you want abs ? i would not ..

you did not say that this was running already so we assumed it was a project.
by old engine .. did you simply rebuild the same engine ? or did you rebuild another engine and put that in ? there may be an issue with the crank and cam triggers being different.

also try starting with both cam sensors unpluged. it will run with out them. it will not fire right away it will need to crank over 3-5 turns then it will fire.

obd2 compliance ? what for ? on a project car ? i'm not sure of where you are located but around here the car needs to meet or exceed emissions of its date of manufacture and at that age there are none.

how did you lock the center differential ? and dont tell me you welded it because that's cheating

CaptainGVT 02-01-2013 12:11 PM

Old engine had an undetermined amount of miles on the donor car and always ran hot. The goal was always to have a new mill and we used the old one just to shake out the bugs during testing.

The new engine is built from scratch using some of the old bolt on parts. Added an FPgreen turbo, Up and down pipe, new BOV, better fuel pump and injectors, and wanted to do a simple- but reliable/safe tune. Just to keep it simple, I expect about 280-300hp in a car that weighs about 1800lbs.

All is for squat, if I can't get the thing to fire.

OBDII for resale one day, all states don't look at emissions the same, so I want to keep that, as well as the ABS, and all of the other etc. Car is registered as a 2012 Custom in North Carolina- so emissions are compulsory.

And yes- we cheated with the diff.

Any thoughts on the possibility of the electrical issue that shut the test mill down in the rain, and any similarities to this one not having fire? That should be checked in the event it has reared it's head during the transfer of the engines.

frank_ster 02-01-2013 02:35 PM

^ well if its 2012 does it need to be odb2 compliant ? for emissions can't it just pass a sniffer test ? because with mega squirt you can pass sniffer tests with out a problem as long as everything else is correct.

CaptainGVT 02-01-2013 04:47 PM

I read up on MegaSquirt, and quite honestly- it sounds like Chinese to me. I would rather trouble shoot what is here and worked in the past, rather than reinvent my wheel.

Any ideas to check with the existing system would be great. Otherwise, I will continue to scratch my head.

frank_ster 02-01-2013 05:35 PM

well megasquirt is 100% do what ever you want.

i installed a megasquirt 1 in a 95 golf in brazil in about 45 min and another 45 min of tuning and it was then flexfuel ! that engine only needed 10 wires ! total cost under 200$

CaptainGVT 02-01-2013 07:55 PM

Well then, come put one in my car! After reading again, it seems pretty confusing. BUNCHES of options, and most of the components don't make any sense to me. I am showing my lack of tuning ability, so again... not sure it's for me. For someone who knows a lot more than me?? Sure!

Don't feel comfortable tackling that on my own.

frank_ster 02-01-2013 09:17 PM

a lot of dyno shops know it. so you would just need to get it wired up. they can make it run and tune it in an afternoon

ehsnils 02-01-2013 11:43 PM

First question would be if you have any codes from the system. That could tell a lot about why it's not working.


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