Gti6 Ecu

[hillbilly 3]

i have a 306gti6 and i took out the ecu to give my mate a loan of it. he got another one and gave it to me and when i put it in my car the car started. then the next day it wouldnt so my question is if i put the original ecu back in will it work? or have i fooked the transponder?

[boldy205 75]

Seeing as it's previously started then can't see it being the ECU. Unless it's not quite plugged in properly? What happens when you try to start it?

[hillbilly 3]

When I try to start the car it just turns over. And there's definitely petrol in it

[dobboy 231 2 Cars]

does the fuel pump prime?

[Anthony 1,003]

If this is in a 306 then chances are you've just locked the replacement ECU. I think if you put the original back in it'll work, otherwise you'll need the immobiser related bits from whatever car the new ECU came from.

[boldy205 75]

Just re read your original post, so you have a different ECU. Why not get your old one back to try it?