A4 B7 1.8T Lumpy/Rough idling like a tractor after injector change!!
I have just installed the 386 cc injectors into my 2006 A4 1.8T, the car was running great with the stage one software, but I got greedy and wanted for more, I changed the injectors and re-pressurised the fuel rail, when the car started, it is really rough and lumpy, it goes like vom..vom..vom..vom constantly for 30 seconds and then I switch it off to prevent any damages, which the engine speed very unstable, seems like someone who was revving it on the starting grid :faint:
I was thinking it has to be related with the ECU not adapting to the new injector, or one of the injectors is defect, or I haven't connect the harness on properly.
Any idea or contribution will be greatly appreciated, I thank you all for viewing and those who helped out!! :icon_thumright: