[hartley88]

Can anyone tell me how to adjust (advance) the timing on 3.9 2004 mustang? Is it done electonically? Any advice will be much appreciated. Thanks.

 

[shinerstang]

It is done electronically through the computer.....

 

[MineralIronHors]

Get a handheld tuner. I have a SCT X3 and a 93 octane tune from Justin at VMPtuning. With the 93 octane tune, he adjusts the timing to increase power. I'd say i gained about 15-20 hp with the tune.