S5 Harness And Ecu/s4 Motor?
Thread Starter
Joined: Oct 2005
Posts: 1,899
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From: Willamette Valley, OR
S5 Harness And Ecu/s4 Motor?
Hey Guys Im Kind Of A Fb Guy, But A Friend Of Mine And I Are Wondering Can We Use The Stock Wiring Harness And Ecu In A 90 S5 And Swap In A 87 S4 Turbo Motor???
Will This Work?
We Have Installed Everything Incluning A New Hp Fuel Pump And All We Can Get Are Flame Shooting Backfires.
Thanks For The Help.
Will This Work?
We Have Installed Everything Incluning A New Hp Fuel Pump And All We Can Get Are Flame Shooting Backfires.
Thanks For The Help.
If the car is a 90 FC, And the engine is an S4. Yes you can use the engine. I would recomend using the S5 lower and upper intakes And swap out the manual OMP and use the s5 front housings.
Former Moderator. RIP Icemark.
Joined: Apr 2001
Posts: 25,896
Likes: 24
From: Rohnert Park CA
If the 90 harness and ECU are not Turbo ones, the timing and map will be all off. The Timeing will be off slightly anyway, just using a S5 ECU on a S4 block, so you will probably need to compinsate for that anyway.
