08-06-2020, 02:49 PM
Okay so generally when you introduce air to an engine quickly, if there is hesitation the engine isn't getting enough fuel.
I would first check the vacuum reference going to the fuel pressure regulator from the inlet manifold, and check that the fuel pump is actually getting 12-13v when the engine is running and that the fuel rail is receiving the pressure indicated/marked on it.
It might be worthwhile changing the fuel filter as well.
A fault code like that isn't necessarily a faulty sensor, the ECU can only fuel trim so far and it assumes the sensor is faulty. the ECU cannot see mechanical problems such as low fuel pressure, so it would see a lean condition and flag a mixture issue because it cannot correct the values it is seeing on the lambda sensor.
Or if it's lean and you're using more throttle, it can sometimes show a MAP sensor failure, because it's not expecting to see a certain vacuum level for a given condition.
I would first check the vacuum reference going to the fuel pressure regulator from the inlet manifold, and check that the fuel pump is actually getting 12-13v when the engine is running and that the fuel rail is receiving the pressure indicated/marked on it.
It might be worthwhile changing the fuel filter as well.
A fault code like that isn't necessarily a faulty sensor, the ECU can only fuel trim so far and it assumes the sensor is faulty. the ECU cannot see mechanical problems such as low fuel pressure, so it would see a lean condition and flag a mixture issue because it cannot correct the values it is seeing on the lambda sensor.
Or if it's lean and you're using more throttle, it can sometimes show a MAP sensor failure, because it's not expecting to see a certain vacuum level for a given condition.
A moments silence please, for our brothers in the NAD-zone.