Does anyone know of a programmable engine management system because i wanted to turbo my 2001 4.0 SOHC and be able to run about 5 psi and program it myself so I don't need to go to a shop and have it reprogrammed every time it runs lean or rich.

 

Welcome to the forum


Your 2001 Ranger will have a Ford EEC-V computer, pretty much all Fords from 1996 and up use same programmable computer

Try:
The TwEECer -- Ford EEC user programmable module

Also Google: ford eec v tuning software

EEC-IV was the older computer, tuning software for this computer won't work with EEC-V

4.0l SOHC is not a great candidate for turbo or super chargers because of it's 9.7:1 compression ratio, while it will make extra power for sure, its nothing like the power gain from lower compression engine, i.e. 8.0-9.0:1

 

Thanks for the information i will look into the options