Fuel pressure sensor C class 220 cdi 2003

[bonyfrae]

The engine misfires and stalls; diagnostics show that the fuel pressure sensor reads erratic fuel pressure,(front of the fuel rail) with very high spikes of pressure or very low; the fuel pressure sensor was replaced but there is no change to the engine, still stalls and misfires.

When I disconnect the wire connector from the fuel pressure sensor, the engines runs without stalling very smooth, however the turbo does not come on; but no stalling and no misfiring. What do I do next?, what do you think the problem is?

 

[Benza750]

When was the last time fuel filter was replaced with a good quality branded filter?Get the injectors tested for excessive leak off, as this can also cause the same faults & symptoms your having

 

[bonyfrae]

I changed the fuel filter three days ago but there is no difference, still misfires when I connect the fuel pressure sensor.

 

[Benza750]

I changed the fuel filter three days ago but there is no difference, still misfires when I connect the fuel pressure sensor.

You need to get it on diagnostic equipement so that all the actual values can be read,