car wont run

[1981t25gti]

hello , can anyone help , i had my ecu chipped and had problems with it so i have bought a replacement ecu complete with immo and chip , plugged it all in and it fires up but wont run , i can hear the fuel pump priming , and there is plenty of fuel in , any ideas ?

cheers dave

[topher]

what car?

[1981t25gti]

hello , sorry its a mk3 gti 8v AGG engine code

cheers dave

[topher]

unless you've swapped the immo box and key to match the ecu then you'll need to find someone with vagcom to pair up the replacement ecu to the immo

[1981t25gti]

yes i have swapped the whole lot including the immobilizer and transponder that came with the ecu

[Diamond Hell]

Did you see the car they were from running and then take the box, key, ring and ECU out of the car?

Sure they're all from the same car?

[1981t25gti]

hello , no i didnt see it running , just bought it from a company on ebay , i have a bypass for the immobilizer so  i might try and see if that works,

[1981t25gti]

it fires up and runs for a split second before stalling , would the immobilizer do this ?

[Bellend]

it fires up and runs for a split second before stalling , would the immobilizer do this ?

Yes.