2.3L Ford EFI Modifications - Oxygen Sensor
I've been researching some inexpensive ways of improving performance by modifying the electronic fuel injection (EFI) components. Here's the theory behind what works and what may work.
Swap in a larger mass air flow (MAF) sensor - not needed!
The stock MAF for the 2.3L (100 hp) is the same one that is used on the 3.0L (145 hp) engines. It appears that the stock MAF can flow enough air already to support up to 145 hp! The real issue is the air flow through the complete cold air intake system from outside air to the fuel injector body inlet. The available air flow of the stock MAF explains why we can go to a larger fuel injector!
Stock 2.3L MAF
Move the MAF Position
Normally, the MAF is located next to the air filter with an intake muffler or pipe between it and the throttle body housing. For a better throttle response, move the MAF next to the throttle body housing. This will put the order of objects: air filter, intake muffler, MAF then throttle body housing. This eliminates the air mass from the intake muffler and let the MAF respond faster to throttle changes. This mod puts a little snap in to the throttle response.
Here's the MAF moved closer to the throttle body with teardrop shaped intake muffler.
Barrel shape intake muffler
On Ranger pickups, I've seen two styles of intake mufflers: tear drop shape and barrel shape. My truck has the tear drop shape. If you use one of the rubber hoses from a barrel shaped intake muffler, you can mount the MAF directly to the throttle body. Then use the remaining rubber hoses to connect the intake muffler (which I shortened) to fit the air filter on.
Tips and Tricks
If you have some tips and tricks that squeeze a little more power out of your 2.3L Ford and you want to share them, contact me at:
