Originally Posted by
Sunil_FiestaRS1800
Ive done this before. It will run but dont give it balls out or you might blow the engine.
The ecu change is so simple. Straight swap two bolts, you cant go wrong. If i remember rightly the best ecu for a 2.0 conversion is the "GURU" coded ecu, well best for a fiesta anyways
GURU is the standard 1.6 Fiesta Si ECU
The best and easiest ECU to use are pre PATS 2.0 Mondeo ECUs with the code DEEP, DESK or DEWY along with a matching 2.0 MAF sensor