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Old 07-30-2013, 06:19 PM   #1
subie.wrex
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Default 2.5 sohc replacement engine

Picked up an 01 legacy with a blown motor. Replaced the motor with exact same block and heads from same year legacy. Any chance the ecu needs to go with the new engine? Not getting any spark due to the ecu not reading cam and crank sensors right or could be something else too. Replaced both sensors. Checked all grounds, everything looks great. Engine cranks and gets fuel but will not spark. New plugs and wires. Coil pack is fine. Any input is great.
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Old 07-30-2013, 07:28 PM   #2
JoeBowHunter
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Im not too sure but I would get out the ol multi meter and go digging.
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Old 07-30-2013, 07:46 PM   #3
subie.wrex
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Originally Posted by JoeBowHunter View Post
Im not too sure but I would get out the ol multi meter and go digging.
I have tested everything i could possibly test. Some funky readings. Delayed spark makes me think the ecu in the car is not reading the sensors right.
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Old 07-31-2013, 09:02 AM   #4
Patrick Olsen
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Do you still have the old engine? When I've done engine swaps, I've re-used the old intake manifold (with wiring harness, fuel injectors, and sensors attached) on the "new" engine. That way all the stuff I knew was good I kept.
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Old 07-31-2013, 02:07 PM   #5
subie.wrex
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Quote:
Originally Posted by Patrick Olsen View Post
Do you still have the old engine? When I've done engine swaps, I've re-used the old intake manifold (with wiring harness, fuel injectors, and sensors attached) on the "new" engine. That way all the stuff I knew was good I kept.
Yes i have. And i did end up getting the ecu out of the car i took the engine from. Still nothing! And everything checks out
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Old 07-31-2013, 11:08 PM   #6
Patrick Olsen
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Well, that sucks.
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Old 08-01-2013, 08:20 AM   #7
subie.wrex
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Well, that sucks.
Looks like the timing belt jumped a few teeth.
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Old 08-01-2013, 08:20 AM   #8
subie.wrex
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Quote:
Originally Posted by subie.wrex View Post

Looks like the timing belt jumped a few teeth.
Got it running though. All set
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Old 08-01-2013, 09:08 AM   #9
Patrick Olsen
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Well, that doesn't suck.
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