Problems with air flow sensor

Good morning companions ... I have a problem with the air flow sensor from my mitsubishi Mirage is 93 ... I have little time with the vehicle and it turns out that they had taken the light of the check Engine it turns Disconnected and when I connect it, the rpm goes out and goes down and lowers ... I realized that this original came with 1.8 engine and now it has a 1.5 would that have to see that with the problem? Another thing when I remove the air inlet hose from the acceleration body and connect that sensor nothing happens but when placing it it turns off ... I hope you can understand what I wrote and can address me with the problem ... Good day

Good morning friend, deals with this plan to rebuild the installation of the MAF sensor

Hi, look, do not get to reject anything, you spliced ​​all the sensors are calibrated to your engine. So if the MAP has to notice 1 kilo example movement and the new smaller engine gives it 750gms <-Example. You will tell me how you want to work hehehe. What is necessary to leave the car well: you need someone with equipment for it to get into the switchboard of your car and put the 1.5 engine map and thus your car recognize the volume of air aspirated and everything else.
or put a switchboard of a 1.5 engine and so the sensors do not turn crazy to the engine.

Map recognizes little air aspirated injects more gas to get storms is stopped <- Is that what happens?

I do not know if it is allowed to put links to other straws, if I do not ask, this post is erased.
Aki I leave you for you to understand about the mapey the importance it has in the rounding and proper functioning of the vehicle.

www.chiptuners.es/foro/viewForum.php?f=1...2678677C2E2F036A8AD4

Good night, thank you for the help you give me ... I agree with what it says is whether the ECU change for the 1.5 without touching the sensors is the problem over? Or in that case, change the air flow sensor for a 1.5 and voila? The other sensors will not give me problems