Originally Posted by roxspin72
Well, I went to this shop today and was told they cant tune my truck because they did not know the software. Long story short, they have a Dyno that they can let me do three runs for $75. But I will have to tune myself. In this case I guess I should just learn how to do it myself, since Dyno's wont help if not street tuned first.
I know I need:
a Scan tool. usb from scan to my laptop. Anything else? I've heard and read talk of the wide band... Does this just go into the OBDII port, or does it thread into the existing O2 bung near my Y-pipe.
I really wish someone would do an adequate write up on tuning. The PDF is cool and all but I need something more like MAF Cali; Tuning for DUMMIES... LOL.
the utune is a great guide, read it, then read it ten more time til you understand.
You'll need a wideband to tune you open loop trims, which is more of what youll want to change as you wont get much of a benefit tuning clooped loop as the computer will always try to get the AFR back to 14.7.
the wideband is another type of o2 sensor, that as its title says, reads a "wider band" of air/fuel mixture. youll need to have a new bung welded in the header, or ypipe to mount the sensor, and either run the wires to your laptop, or to a wideband gauge to monitor at all times.