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[Jamesm]

Both plugs goin to the ecu at the fuse pack are different ?

[05omegav6]

Remove 2.5 from car, leaving loom, ecu and throttle cable in car.

Take all the sensors, coilpacks and throttle body off the 3.2.

Fit 2.5 throttle body, sensors, dispack and plug leads to the cleared 3.2.

Refit 3.2 into car, plug all the wiring back in, and reattatch the throttle cable.

That's it, nice and straight forward, and imo a waste of a 3.2

Only tuning would be 3.0 throttle body and ecu. 3.2 has better exhaust manifolds, but you are already fitting them with the engine. May as well fit the whole 3.2 exhaust too.

[Jamesm]

Wat do u mean cleared 3.2 ?

[05omegav6]

Cleared as in take all the 3.2 sensors off the 3.2 replace them with all the sensors off the 2.5.

It really isn't that complicated

[Marks DTM Calib]

You fit the wiring loom, ecu and sensors from the 2.5 to the 3.2.

Add in the 2.5 plenum and cam covers plus the DIS pack and leads. 

[05omegav6]

Much more eloquently put

[serek]

Jamesm you can crack on with swap all info there 

[Jamesm]

How do i fit the ecu from 2.5 to 3.2 both plugs are different ? Do i take the loom of from the side of the engine ?

[05omegav6]

Send me £10,000 and i'll be over at the weekend to do it

Would politely suggest you get someone else to do it

Better still, scrap the whole idea...

[05omegav6]

How do i fit the ecu from 2.5 to 3.2 both plugs are different ? Do i take the loom of from the side of the engine ?

YOU DON'T

[Jamesm]

Both engines just out il give it a go anyway

[serek]

How do i fit the ecu from 2.5 to 3.2 both plugs are different ? Do i take the loom of from the side of the engine ?

YOU DON'T

calm down 
I go there and get done for £5K

[05omegav6]

How do i fit the ecu from 2.5 to 3.2 both plugs are different ? Do i take the loom of from the side of the engine ?

YOU DON'T

calm down 
I go there and get done for £5K

Do you think he heard me then I was getting the impression that the previous replies were either too quiet or too complicated, so I went for shouty and straightforward 

I put fair odds on someone being paid good money to sort out the resulting mess though

[Marks DTM Calib]

The ECU answer is simple, you sue the ECU and wiring loom from the 2.5 along with its sensors etc.

All you use of the 3.2 its block, heads etc, the mechanical bits (excluding the cam covers which need to be from the 2.5)

[Jamesm]

Will the 2.5 ecu run the 3.2 properly