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Vy 3.8 engine swapped with vu 3.8 won’t start

stdj123

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hey guys
Just helped a mate swap his blown engine out of his vy Ute and put a vu 3.8 in but used the vy ecu and harness and she won’t start there plenty of fuel getting to it there’s spark and it turns over what could be the issue?
 

Zeke Topanaga

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It's the ECU, you will need the VU ECU.
 

delcowizzid

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Don' use anything wiring or ecu off the donor car just the engine.did you get the fuel hoses round the right way
 
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harrop.senator

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It won't have spark the security's stopping you. Pull the harness and pcm and refit the vu harness and pcm just use the long motor like delco said.
 

delcowizzid

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They always have spark even without an ecu connected.you sure you plugged in all the plugs and bolted the earth on the back of the head I think it is on those.if the fuel hoses are on backwards it won't run .
 
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harrop.senator

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Yeah you'd know better I thought it was spark it was missing when I first put a vx motor in a vs years and years ago lol.
 
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