[Power Hungry]

With examples, this will be a long post so bear with me. (Just don't bare with me... :1moon

Starting with selecting Custom Options, you make the following changes:

WOT 1-2: 5300 RPM
WOT 2-3: 5300 RPM
WOT 3-4: 4800 RPM

Rev Limit: 5800 RPM
Speed Limit: 140 MPH

Tire Size: 2662mm
Gear Ratio: 3.73

Timing: +1.5 Deg.

You program the vehicle and everything is fine. Then you decide to make changes. You go into Custom Options and then select Load Previous Settings. Here's what you end up with:

WOT 1-2: 5300 RPM
WOT 2-3: 5300 RPM
WOT 3-4: 4800 RPM

Rev Limit: 5800 RPM
Speed Limit: 140 MPH

Tire Size: 2662mm
Gear Ratio: 3.73

Timing: +1.5 Deg.

Now you make the following changes:

WOT 1-2: 5200 RPM

Timing: +2.0 Deg.

Idle: +50 RPM

What you end up with is this:

WOT 1-2: 5200 RPM
WOT 2-3: 5300 RPM
WOT 3-4: 4800 RPM

Rev Limit: 5800 RPM
Speed Limit: 140 MPH

Tire Size: 2662mm
Gear Ratio: 3.73

Timing: +2.0 Deg.

Idle: +50 RPM

These options do not change depending on the level you are programming. +2.0 Degrees of timing is the same for 87 Towing as it is for 93 Performance (ie. Level 2 and Level 3 respectively.)

If you select Custom Options, do NOT do Load Previous Settings, and then hit Done to begin programming, it does NOT clear any stored custom option status, it just doesn't use them this programming session. However, the next time you program and press Load Previous Settings, they will still be active. In this sense, all custom settings are cumulative, even those you made multiple sessions ago. Once an Option has been flagged as custom and a value selected for it, it will always be included in the Load Previous Settings.

What I do think would be handy is a way to clear out any currently flagged custom options so it would be possible to start from scratch. I'll probably use a manual option like "Clear All Custom Settings" which will reset the status of all custom options.

Does this make any more sense now?