Good morning, I have a Giulietta 1.6 Mtj of 2017 that at first start up has the idle speed that oscillates from 850 to 1100 rpm, at the dealership they replaced the throttle, the EGR valve and 2 injectors. the problem had disappeared after the replacement of the injectors but now it has reappeared. however, I removed the 2 injectors that had not been replaced and I had them checked by the pump specialist (we have changed and inserted the new codes).

what do you think could generate this idle decompensation?

Number plate FK278WS

Thank you kind regards Raphael