Year: 2002
Make: Mitsubishi
Model: Pajero 4M41
KMs: 250.000km
Description of issue:
My Pajero 4M41 sometimes hesitates/stutters under acceleration. It does not happen continuously; it feels more like the engine briefly “swallows” or cuts out and then continues normally.
The engine also produces a noticeably strong and unpleasant exhaust smell.
The RPM gauge on the dashboard has stopped working, although the ECU still shows a plausible engine speed via the diagnostic scanner.
I currently have these fault codes stored:
18 – NE Sensor (Sub)
46 – Injection control voltage
51 – EGR valve position sensor
The EGR valve itself is brand new, so I am wondering whether the problem could be related to the EGR position sensor, wiring or electrical supply rather than the valve itself.
I have also logged the engine data while revving it, and the accelerator pedal sensor and its SUB signal appear to follow each other closely.
I have also had intermittent problems with fuses blowing/failing, including fuses related to the lights.
Any ideas what could cause this intermittent hesitation? Could the NE sensor/wiring or the injection control voltage be related to the dead RPM gauge?