FordFusionClub.com banner
1 - 4 of 4 Posts

·
Registered
Joined
·
85 Posts
Discussion Starter · #1 ·
so if i take out the air box and filter and the resonator underneath (where the air box resonator plugs into), I want to put a small high-temp tube in and then a pipe, going to the void in the fender (behind the little rubber piece that covers the headlight access). then a filter cone in that void. is there any problem with just cutting a hole in the tube and putting the MAF in there? am i going to throw any codes with this?
 

·
Registered
Joined
·
165 Posts
Where are you going to attach this tube? At the rubber bellows where the stock filter box now attaches, if so you will need to move the MAF sensor further away from the thottle body to lessen the intake pulse from the engine which will effect how the sensor reads the air flow. When you open up the intake path from the engine the pulse strength is increased, keeping the MAF sensor to close to the throttle body creates a reversion pulse and screws with the sensors ability to read the airflow. But as you move the sensor away from the Throttle body you need to maintain the incoming airflow to maintain idle quality too. This is usually done with an Air Trumpet insert made into the MAF housing. If you notice in the stock filter box sensor housing the area where the sensor is located actually venturies down from 3" to 2.25", as air is drawn in by the engine the air flow pulled through the smaller area speeds up the flow across the sensor and provides accurate air and fuel information to the ECU. Without the trumpets the air flow at idle is lazy and idle quality creates a surging effect. Your question about just cutting a slot in the tube for the MAF is correct but you will need to also have a way to seal the base of the sensor and have a way to keep it in location and not fall out.
 

·
Registered
Joined
·
440 Posts
if you change where the MAF goes, or significantly alter the tube before and after the MAF, your PCM will need to be retuned, on a dyno or with a wideband sensor, to prevent the car from running dangeroulsy lean. The MAF takes a small sample of air, and the PCM calculates the total air, using the specs it knows is correct. when you change the flow of air around the MAF, the PCM wont calculate the total air correctly.
 

·
Registered
Joined
·
85 Posts
Discussion Starter · #4 ·
i AM thinking about making the MAF go in about the same place. And bob, as soon as i get those pennies saved...i will have a tune! :-D
 
1 - 4 of 4 Posts
Top