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Old 01-25-2006, 05:13 AM   #1
Scooby Newbie
Member#: 105927
Join Date: Jan 2006
Default late 1980s Subaru Ignition questions

Hi Folks,

I need some information (schematics) on the old distributor + coil ignition system from the early '90 legacy EJ18.
I recently fitted a 1990 Legacy N/A (carb) EJ18 engine into a project car.

The project car does not have a suitable wire loom for this engine, so I'm making a temporary loom to make the engine run.

I have fuel but no spark; the engine ran before I removed it from the Legacy.

I followed the wires before I removed the engine,

there are 2 wires to the coil, one a yellow, ( 12V+ supply, I think) which also feeds to the the distributer, then to a capacitor. The other coil wire is black/blue+red which also goes to the distributor, (changes to black/white at connector)
the black/blue wire comes (as does the yellow) through the bulkhead from the inside of the car.

I want to figure out where this black/blue+red wire connects inside the car. (Before removal, I cut this wire just outside the bulkhead, with the engine running, and it didn’t stop!, so I assumed I would NOT need it, I thought it was just for tacho)
I have the yellow conencted to +12v, yet I don't have a spark at the plugs, but it did with the black/blue+red wire cut??

This is confusing me some, If I had a schematic I could maybe figure this out

This ignition circuit is probably found on other models form late '80s, early '90s

Thanks for any help.
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Last edited by dancn; 01-25-2006 at 01:02 PM.
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Old 01-25-2006, 10:36 AM   #2
Scooby Guru
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
96L Most Over-
Developed Beater


You might wanna try www.ultimatesubaru.net

There is a world of Subaru knowledge within that community. Specifically the earlier models.

Jay Storm
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Old 01-25-2006, 01:25 PM   #3
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Join Date: Nov 2002
Chapter/Region: South East
Location: RIP WJM.

are you in the US? cause if you are then we never got the dist EJs, and I don't think any EJ was ever carb'd from the factory. now if you're talking about loyales, then it would be EA82.
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Old 01-26-2006, 04:53 AM   #4
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Join Date: Jan 2006

No it’s a European carbed EJ18.
Problem solved anyway.
Both the coil and the dissy have a round 2 pin plug. On the dissy and coil there are 2 wires a yellow and a black-white. On the loom there is a yellow (12v+ IGN) and black–blue ( - ).

When I looked at the loom closer on the donor legacy, I spotted that the switched 12v+ yellow on the loom, does NOT go to the yellow on the coil or dissy. The yellow goes to black-white, the black-blue goes to yellow.!!!

Swapped them around, hey presto the engine fired up 1st time
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