Pretesting Inspection

If MPI system components fail, interruption of fuel supply or failure to supply proper amount of fuel for engine operation will result. The engine may be hard to start or not start at all. Unstable idle and/or poor driveability will be noticed. If any of these conditions exist, perform inspection by self-diagnosis and basic engine checks (ignition system malfunctions, incorrect engine adjustments, etc.). Then inspect MPI system components using an ECI checker.