2.5 Conversion

[JonDubber]

Just fitted a 2.5 into my 320i, but it won't start. It still has the 320i ECU in it, would this be the cause? I thought that it would run, just not very well...

[munky30]

afaik you need to swap the chip in the 320 ecu for a 325 one.

I have one you can buy.

edit> actually I have two, from an 073 part number ecu and a 380 one.

[JonDubber]

Thing is, the engine came out of a G reg 320i touring - I'm waiting for Gaszman to get in touch so I can ask him for either the ECU, or the part number on the ECU (as I know it ran with that ECU).

So the engine wouldn't run at all on a 320i ECU?

I'll be in touch mate

[munky30]

I dont know if it will run or not with the 320 ecu... My uneducated guess would be no. But I dont know much...

Have you checked everything else that could be causing it not to work?

Is it turning over but just not firing?

[karldan]

hi it should run on a 320 ecu as mine does wivout changeing the chip.