Visual difference between EFI & MFI?
#1
03-31-2005, 05:38 PM
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Visual difference between EFI & MFI?
Everytime I search or ask for parts for my '94 F-150 I get asked whether I have the 5.8 EFI or MFI. Most of the time the parts I'm looking for are the same for both, but I'd like to know what type of fuel injection I actually have. Is there any visual que I could look at the would identify the type?
Thanks
U.M.
Thanks
U.M.
#3
04-03-2005, 11:49 PM
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A 94 could have either speed-density MPFI which is sometimes referred to as MFI or mass-airflow SEFI (sequential electronic fuel injection) also referred to as simply EFI.
The obvious external physical difference is the presence of a mass-air meter. Look at the two hoses which bring air from the intake air box to the throttle body. If at the airbox end, the hoses join together into a single hose and attach to the air meter (an aluminum cylinder about 2.5" in diameter x about 3" long) you have mass-airflow, i.e. EFI. If they remain separate until they enter the airbox you have speed-density MFI.
The obvious external physical difference is the presence of a mass-air meter. Look at the two hoses which bring air from the intake air box to the throttle body. If at the airbox end, the hoses join together into a single hose and attach to the air meter (an aluminum cylinder about 2.5" in diameter x about 3" long) you have mass-airflow, i.e. EFI. If they remain separate until they enter the airbox you have speed-density MFI.
#4
04-04-2005, 06:52 PM
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Originally posted by StrangeRanger
A 94 could have either speed-density MPFI which is sometimes referred to as MFI or mass-airflow SEFI (sequential electronic fuel injection) also referred to as simply EFI.
The obvious external physical difference is the presence of a mass-air meter. Look at the two hoses which bring air from the intake air box to the throttle body. If at the airbox end, the hoses join together into a single hose and attach to the air meter (an aluminum cylinder about 2.5" in diameter x about 3" long) you have mass-airflow, i.e. EFI. If they remain separate until they enter the airbox you have speed-density MFI.
A 94 could have either speed-density MPFI which is sometimes referred to as MFI or mass-airflow SEFI (sequential electronic fuel injection) also referred to as simply EFI.
The obvious external physical difference is the presence of a mass-air meter. Look at the two hoses which bring air from the intake air box to the throttle body. If at the airbox end, the hoses join together into a single hose and attach to the air meter (an aluminum cylinder about 2.5" in diameter x about 3" long) you have mass-airflow, i.e. EFI. If they remain separate until they enter the airbox you have speed-density MFI.
U.M.
