Newbie needs mod help (please help)

[PSDRULES]

I just bought my first diesel. It is a 1997 F-250 PSD Supercab Long Bed.
My main goal is to increase fuel economy as much as possible.
I plan on starting with tymar intake and either straight stock pipe or 4" exhaust. I found a tuner in the back of the truck and have no idea how to use it, nor does the dealer that sold me the truck. I am worried that any mods I may do might mess things up.

How do I know if my truck is set to factory settings?
Do I need gauges when I do the Intake/Muffler mods?

I will found out the name of the Tuner and try to send some pictures.

[moore20017.3]

No you don't need guages unless you increase the fuel (chip)

Send a name or picture of the programmer and someone will be able to instruct you on installation.

[bigwhite7.3stroker]

WELCOME TO ORG! ! !

No need for gauges with just intake and exhaust the truck will run cooler than stock

Find out name of tuner and we'll help you find out if it is tuned

[PSDRULES]

This forum is awesome!!
Thanks guys, I will find out the name of the programmer and reply tomorrow.

[bigwhite7.3stroker]

No problem man

You'll find all kinds of onfo and helpful people here

[pipelayerjdh]

Welcome to the ORG.!

Congrats on the truck!

Does it still have the factory down pipe. If so, it would be the first thing i changed.

[PSDRULES]

How can I tell if it is the factory down pipe? And if it is ,do I change it along with the rest of the exhaust or can it be done by itself.