Does my 1993 jdm mazda rx7 have a mass air flow sensor?
you'll find on these forums that the rx7 has a MAP (manifold absolute pressure) base system would be considered common knowlege
you'll also find that the search button is a useful tool
you'll also find that the search button is a useful tool
^
Actually I would be to differ most common day cars use a combination of both and the era in which or cars produced engineers chose either one or the other.
Lets face it in 2 years you will look back on your own thread and have a good laugh about it too so don't be so glum chum.
Actually I would be to differ most common day cars use a combination of both and the era in which or cars produced engineers chose either one or the other.
Lets face it in 2 years you will look back on your own thread and have a good laugh about it too so don't be so glum chum.
Pure speed density systems still exist on brand new cars and they are more sophisticated than ever. Take the Taurus SHO for example, 3.5L directed injected twin turbo:




They may use an airflow sensor and a MAP sensor, but all the load calculations are based on airflow sensor voltage with corrections made for driving conditions. That's how the 2nd gen Rx-7's worked (flapper airflow meter + 2 bar MAP sensor) back in 1986, and Subarus are now a perfect modern example of this. On those cars all the fuel and timing tables are indexed based on Absolute Load calculations:


The MAP sensor is used for things like closed loop boost control and evaporative emissions. In the end, you're still either speed density (Bosch D-Jetronic style, Porsche 914) or airflow meter based (Bosch L-Jetronic style, Porsche 924) for the main EFI calculations.




most common day cars use a combination of both


The MAP sensor is used for things like closed loop boost control and evaporative emissions. In the end, you're still either speed density (Bosch D-Jetronic style, Porsche 914) or airflow meter based (Bosch L-Jetronic style, Porsche 924) for the main EFI calculations.
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befarrer
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