This is the second car i've owned with OBD-II (on board diagnostics) and
since the other one is 'hers' I only knew that it was an annoying idiot light thrower
thats not all. That computer is smart.
Think about a tuner as a platform to program your car, literally.
Lights, sensors and tolerances, shift points, air fuel mix, gear ratios, you name it
if there is math involved you can most likely tweak it.
Side note: this started in the '96 models (i believe)
if you own a '94-'95 you have OBD-I = not near as smart.
before that you just have gears and pulleys so tuners lose their luster.
Someone correct me if my years are wrong.
Im not to sure about the years for OBD II with the mustang, but i know ford made the ranger OBD II in 94 i believe, when they changed the body style. I used to have a 95 ranger and it was OBD II, dont know if ford did that on the mustang though. The standard is 96 and up though for OBD II
I have a SCT X3 and I can adjust the timing through differant RPM ranges ( 0-2000 - 2001-4000 4001-6000 etc.) you can add up to 4 deg. or take it out. and the fuel you can only change for WOT.
Preloaded is the canned tune that comes on the hand held, a Custom tune is done with special software either on a Dyno or through a Tuners expertise with the engine combo you have!
Must canned tunes are on the mild side timing wise, I managed a 5% Spark Advance at both rpm settings on the 93 Octane Predator one! And I wasn't aware that the Xcal could adjust part throttle timing? I'll have to look into that:headscratch:
When you advance timing you also need to monitor your A/F ratio to see if you need to richen or lean the mixture, the EEC-V ECU responds well when tuned right. An example when I did a Dyno run with a very aggressive WOT Spark advance I actually lost power cause it got lean, I richened the fuel and boom more HP!
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!