Ref count on my Mitsubishi Triton 2.5 does not go beyond 1.5 and is powerless, I replaced crank sensor but still the same and can not go beyond 20km.

Could be crank sensor, wiring issue, fuel supply pressure ... take a look.

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the tachometer ( rev counter) get its impulses from the ignition system or in the case of a diesel from the crankshaft position sensor
if it runs with introduced fuel ( dangerous for a diesel) but then dies, that indicates insufficient fuel pressure to the injectors
could be a diesel pressure pump ( test to 25,000 psi) not producing sufficient pressure to work injectors
problem fuel supply to pump, tank venting, filters , air in system etc

Test fuel pressure at key on. Next test for spark to plugs. Use "noid" light to test for injector pulse.

Contact a Mitsubishi dealer for advise , could need a new ecu , hard to say without seeing vehicle

How do you change the crank angle sensor in 1997 mitsubishi triton v6 petrol? Do you have to take timing belt off?

check the crankshaft position sensor

Mitsubishi Triton air bag light "ON" and the error cose B1401 F ABG(1) DR Squib open. May I know how to solve.

T COULD BE YOUR CAMSHAFT SENSOR OR CRANKSHAFT SENSOR. SOMETIMESTHE TIMING CHAIN JUMPS A TOOTH AND CAUSES THIS TO HAPPEN ASWELL.

1. At the coils, check for battery voltage at the Red wires while cranking, the Black wires should be less than 0.05 volts while cranking. Pin 3 at the coils (each wire color at the #3 pin are different) using a scope watch for a 3 - 4 volt pulse signal while cranking. Red wire - battery voltage, Black wire is a ground and the White wire is the signal circuit

2. If there is no pulse signal to the power transistors, using a scanner check the POS counts (Position) should be 179 - 181 while cranking. If inconsistent, check the signal plate (flywheel/flex plate) for damaged teeth. If there is an RPM signal and the POS counts are correct, this crankshaft sensor is good.

3. On the front of the engine, mounted on the oil pan is the crankshaft sensor (REF) reference. Check the AC voltage while cranking, should be a clean sine wave that indicates the Top Dead Center (TDC) position of each piston. White and Black wires in a 2 pin connector

4. Check the Camshaft (phase) sensor AC voltage output. This sensor should also be a clean sine wave. This sensor detects cylinder number. This sensor is located in the front cover facing the cam gear. White and Black wires in a 2 pin connector.

had similar problem with 99 ram. i made holes in crank sensor a bit bigger,removed rubber seal that sensor goes through in trans,installed 1 bolt and adjusted sensor back towards firewall and tightened that 1 bolt and its worked fine ever since