My project is the reverse of what I've found on most of the forum.
Background info can be seen in this build journal...
viewtopic.php?f=25&t=55242
I have the project fully assembled now, but have run into wiring issues.
Hoped it would be as straight forward as swapping the crank and cam pins at the ECU, but should have known better with a project like this.
For now, build photos can be found under Instagram #BruntWorks
https://www.instagram.com/explore/tags/bruntworks/
What I have so far...
Body - '92 Turbo
Engine - '94 NA
Transmission - '94 NA
Crossmember - '94 NA
Rear differential - '92 Turbo (3.9 ratio matches donor vehicle)
Exhaust - '94 NA
Wiring harness (body) - '92 Turbo
Wiring harness (engine) - '94 NA
ECU - '94 NA
TCU - '94 NA
I swapped cam pins (B58.4, B58.5, B58.6) and crank pins (B56.1, B56.2, B56.3) at the ECU.
Also, the ignition fuse under the dash had broken, so it was replaced.
On the first attempt to fire it up, the main relay started buzzing very loudly as soon as I gave the key a half turn.
It cranked and turned over for a brief second; however, I never heard the fuel pump whirring and it quickly stopped sparking.
I discovered SBF No.2 had blown, and after studying wiring diagrams, realized it was due to a difference between the Turbo and NA harnesses, with two pins going to power instead of ground.
I replaced pins F25.13 and F25.16 with pins F27.7 and F27.4 from the Turbo harness's connector to fix the issue.
I also replaced SBF No.2 and the 3 relays under the dash with ones from the donor car.
On the second attempt, the main relay still buzzed a bit, but was WAY more quiet.
The starter no longer cranked.
I could hear the fuel pump running, but oddly, only when the key is half turned.
The main relay continues to buzz quietly, even when the key is turned to off.
Tapping or bumping the relay will get it to stop buzzing.
I am debating three options...
- Keep troubleshooting electrical issues with the existing setup.
- Remove the '94 NA harness from the donor car, hook it up temporarily, try getting the engine running.
- Find someone who really knows what their doing to wrap things up, in the Olympia / Seattle area.
I'm leaning toward option 3
Thoughts?
NA to Turbo Swap - No Start
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NA to Turbo Swap - No Start
1990 Subaru Legacy L Wagon - first subaru
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
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- Fifth Gear
- Posts: 2275
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- Location: Auburn, WA
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Re: NA to Turbo Swap - No Start
Since you have a donor car I would swap harnesses
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Yes I have too many Subarus
No you can't have one
05 GD-STI
01- RS- Swapped-07 STI
00- GF
93 SS- "the original Robtune" (now in new hands)
No you can't have one
05 GD-STI
01- RS- Swapped-07 STI
00- GF
93 SS- "the original Robtune" (now in new hands)
Re: NA to Turbo Swap - No Start
Thanks dscoobydoo
Was hoping I wouldn't have to pull the dash, but it did come down to that. I swapped the body's harness and got everything hooked back up today. Started right up! Even drove it down the street, everything seemed to work well.
There is a check engine light, but I should have time to troubleshoot that next week.
Code 31 - Throttle Sensor: Abnormal voltage input entered from throttle sensor. (Fail-safe Operation: Sets throttle sensor's voltage output to a fixed value).
Here is a video from today's startup.
https://www.instagram.com/p/BGnKvWhCy9D ... bruntworks
Was hoping I wouldn't have to pull the dash, but it did come down to that. I swapped the body's harness and got everything hooked back up today. Started right up! Even drove it down the street, everything seemed to work well.
There is a check engine light, but I should have time to troubleshoot that next week.
Code 31 - Throttle Sensor: Abnormal voltage input entered from throttle sensor. (Fail-safe Operation: Sets throttle sensor's voltage output to a fixed value).
Here is a video from today's startup.
https://www.instagram.com/p/BGnKvWhCy9D ... bruntworks
1990 Subaru Legacy L Wagon - first subaru
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
Re: NA to Turbo Swap - No Start
I would suggest checking the TPS against the FSM and see how the readings compare and if necessary adjust the TPS using the instructions in the 3rd scan.
http://main.experiencetherave.com/subar ... sting1.jpg
http://main.experiencetherave.com/subar ... sting2.jpg
http://main.experiencetherave.com/subar ... sting3.jpg
http://main.experiencetherave.com/subar ... sting1.jpg
http://main.experiencetherave.com/subar ... sting2.jpg
http://main.experiencetherave.com/subar ... sting3.jpg
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
Re: NA to Turbo Swap - No Start
The error code ended up being caused by me forgetting to reattached the speedometer cable to the transmission.
It went away as soon as I got it hooked up.
This also got cruise control working, which makes sense considering the importance of that data.
Been driving the wagon around for a couple months now, working great!
Photos Here
It went away as soon as I got it hooked up.
This also got cruise control working, which makes sense considering the importance of that data.
Been driving the wagon around for a couple months now, working great!
Photos Here
1990 Subaru Legacy L Wagon - first subaru
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
Re: NA to Turbo Swap - No Start
Did you clear the ECU after you got the speedo hooked up?
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
Re: NA to Turbo Swap - No Start
Nope, the check engine light went away on its own.
1990 Subaru Legacy L Wagon - first subaru
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
1992 Subaru Legacy LE Touring Wagon - daily driver
1994 Subaru Legacy LS Wagon - parts car
Re: NA to Turbo Swap - No Start
It's a good idea to check and clear the codes after a problem has been fixed so if you have another problem come up in the future you won't then have to guess whether any of the codes were previous codes.
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm