smpi engine definition
Answers.comÂ® is making the world better one answer at a time. SMPI (SEQUENTIAL MULTI PORT INJECTION) MEANS THAT THE CAR'S COMPUTER CONTROLS THE INJECTION OF FUEL IN SEQUENCE WITH THE FIRING ORDER OF THE ENGINE RATHER THAN INJECT ALL THE TIME. ALSO THE COMPUTER CONTROLS THE TRANS SHIFTING, CRUISE CONTROL, CHARGING SYSTEM AND MONITORS ALL SYSTEMS TO OBTAIN THE MOST EFFICIENT OPERATION.