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Automotive electricity

Good I have problem with a mazda bt50 diesel

Luid Velez

hace 6 años

Friends, I have a mazda bt50 year 2011 diesel 2.5 truck, I had a problem that sometimes lost strength and the scanner was put on and there was a low fuel pressure error on the rail and sometimes high pressure on the rail came out .. Time passed and It got worse now, it doesn't turn on anymore ... They tell me what the injectors might be and if someone had this problem and could help me with past experiences it would be very helpful ...

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Mangel HH

19.786

hace 6 años

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hace 6 años

Hi Luid The code that was observed would correspond to P 0190. This would determine an intermittent reading of the sensor or poor signal condition of the wiring / circuit to the Ecu, including dirt / rust at the input of the pin. It is not operating the necessary fuel flow according to the established operating regime. This pressure sensor operates by variable electric resistance of 5v according to the Rpm so that the Ecu determines the flow rate at the moment of injection. Three possibilities to consider

or the sensor is failing, and be careful because it has a high price, or has carbon in its interior (in this case it must be cleaned only with the system by ultrasound because it is super sensitive) or the signal as we have already commented to the Ecu is not correct. Generally the commented cleaning is also carried out in the common rail duct that couples the sensor to its end. Salu2.

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Luid Velez

hace 6 años

Good Mangel thanks for your contribution but apparently the damage in if it will be the injection pump ... Because it is not sucking diesel and therefore there is no price in the high rail system
The test we did connected a gasoline pump to suck fuel and push towards the entrance of the high-pressure pump and the car finally started. But we still do not know if the fault is in the pump or in the injectors, because no We know if there are one or two injectors that are defective open and the price is lost on the rail. You just need to find a mechanic of price pumps

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Mangel HH

19.786

hace 6 años

The pump is not just causing poor pressure. In this case the suction valve scv intervenes, the injectors depend on the correct pressure for their operation, unless diesel is used outside the specification that could affect the delicate injection system.

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Luid Velez

hace 6 años

Already the other week we are going to take it apart there is no doubt

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Luid Velez

hace 6 años

Hi, I already solved the problem, it was the rail price sensor, and the car turns on normal and does not turn off, but now I have another problem it has no power, it does not have a peak, it does not pass 2000 revolutions in 4th and 5th changes, before being damaged when the fault was still the car had strength and it didn't bite now ..
It will be the sensor that is not the original or has a problem elsewhere.

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Mangel HH

19.786

hace 6 años

Take pressure sensor references, the values are variable at different Rpm of the engine, reaching 4.5 at maximum pressure value. Check the wiring of the sensor to the input pin of the Ecu, it can present rust in the connector delivering wrong signal.

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