MAF sensors

Debates in the forum are desirable, that enriches knowledge and clarifies wrong or doubtful concepts, yes, they should be done with respect. In this debate there was no specific lack of respect, but a form of raw expression when referring to the iron of a forist and later to the comment of a moderator who only intends to lower the tone to the comments that are getting out of mother.
To contribute a little sending this description about sensors and its diagnosis.
www.mediafire.com/view/?wfpnghkklegujc15
Luck.
Miguel

Greetings, in this field of automotive electronics, you have to be up to date, and I comment at my own experience, my degree thesis consisted of developing an injection module for a Fiat 88, passing it from carbure The engines, at that time the oxygen sensor was captured once the engine reached operating temperature (> 88oC), currently the engine is turned on from the cold engine (at that time I would have refuted such an idea), but I go through experience with my vehicle, with this I want to say that you have to be clear about the theory, but also to be constantly aware of the innovations, I clarify the question of the innovations. Unknown, that confusion can happen to anyone, but for that there are forums and I clarify that this seems to me in Spanish because there is really intervention of its members, I have learned in this and I also contribute my ideas when they are in my range of knowledge, by the way where I have seen the MAF and MAP together is in the Toyota Camry 98 Motor 3VZ-FE They support each other, as previously commented, the ECU can map by MAF or MAP, notice that it does not throw fuel when any of them disconnected, to complete the quality of the ECU in controlling sensor failures varies from one brand to another, as well as there are vehicles that for nothing stop the engine, there are others that with several dead sensors walk and we find out about it for the unwanted light "Check Engine". Greetings!

VEJ wrote: To Charlypzz I would like to ask if the MAF and MAP are together in what a vehicle if gasoline or diesel to find information and see how they work because I fall that info, because I have seen maf with alpha angles.

They are in some engines together, both in gasoline and diesel.
Beginning for gasoline that casually arrived today to the workshop, Kia Sorento 3.5 V6 with variable admission without turboalimentation.
The ECM receives from the MAF the variable voltage signals of the aspirated air flow and its temperature, similar to any other MAF.
The MAP participates with its signal indicating to the ECM the pressure, in this case, negative, within the admission, with this information the ECM decides at what time to open/close the butterflies of the variable admission.
It should also be noted that these two signs received by the ECM are compared to that of the TPS in their calculations to achieve the best stoichiometric realization, constantly varying the opening time of the injuries and modifying the advance curve to the ignition.

As an example in Diesel you can take the case of the HDI motorizations of Peugeot and Renault.
The MAF also measures the air entry, but also in this case when having EGR valve its signal is used by the ECM for:
Regulate the opening percentage of exhaust gases.
Limit smoke formation during acceleration/deceleration faces due to fuel flow correction.

MAP sensor: In this case the function is invested, when possessing turbocharger, what the sensor will do is measure the positive pressure, its signal is measured by the ECM in precaution that an overpressure occurs within the admission, if this occurs, the ECM will decide to go through an elector valve the relief, by means of the exhaust valve implanted in the turbocharger.
Also, this signal is used to regulate the high pressure pump and the opening time of the injection.

I hope not to have been too extensive, but I really couldn't estract it for it to be understood.

I like everyone's way of expressing their opinions and the truth is that I have moved away a bit from the forum because it has become a bit a supplement to do it yourself and almost only see people asking how to repair your car when you should serve more to learn from each other and rely on difficult problems or to discuss changes in automotive technology. The truth always helps know why a fault occurs and not so much to know the solution. Here in my country there are many who only change random pieces to correct their failures without knowing how they work and if what they are changing produces that fault. As an example: in the air conditioning workshops they replace a pressure sensor in the pipe with a variable resistance just because they have seen someone else to do it. This forum should serve to clarify those who do not know the true functioning of the electronic components of the vehicle and not only to fill the number of interventions in the issues with a very well said or similar things only to reach a thousand.

Haver I mean that there are ways and ways of saying things, it is obio that the forums are to discuss, but there are ways to say things, practical knowledge are good, the theoretics too, it does not make you better or worse only makes you different and with different skills, so if we discuss it it is with respect and without attacking others, you are wrong, it can be replaced by Creeo that you are confused, or it seems to me that you are confused. You mean, they understand me not to enlarge so much, apart that every mechanic knows that you can take 100 years in this and never stop learning new things, anyway it is not good Only people who want to solve doubts, no mentions or titles at stake, okis good luck and hugs for all.