Originally Posted by
x8psycho8x
i have no clue man. i figured i'd need a working map sensor. but my friend (the one gonna sell it to me) said it basically replaces the signal getting sent to the stock ecm and that reguardless of if my map sensor works correctly or not the fcd will tell the ecu i have "perfect" perfect pressure according to what the ecu thinks i should have. something along those lines, but i don't know thats why i'm asking for input lol but i'm gonna tell him that if it doesn't work i want my money back either way lol
Well your ECM/ECU works by a MAP based system. The MAP sensor sees a certain PSI or inHg and takes into account your throttle percentage via a TPS and a few other sensors. Then the ECU/ECM knows exactly how much fuel, and how much timing is required. If the MAP doesn't work correctly, I dont understand how a FCD will help.
FCD's also really work by NOT allowing the ECU/ECM to cut fuel when it sees boost, that's about all they do
.
You better recheck who you consider your "friends".