Just a quick question. Wife is giving the go ahead to order a computer tuner (you know how that goes. . . . .) and was wondering if my engine timing has to be set at factory specs before I install the tuner program?
I've been messing the with timing to try and stop pinging and have no idea where it is set now but it runs great and no ping. . . if I use high octane.
Or will the tuner just ignore what it is set at and do its own thing?

 

What year are you talking about? Since you're talking about message with timing I assume you're dealing with an EEC-IV vehicle. If that's the case, there isn't a tuner for it, just a chip. Yes, it will require you run base timing.

 

Ken,
Its a 1996 F250 460 w/banks headers and muffler (if that makes any difference).

 

Yes, you can use it with 1996. Prior to that it used an EEC-IV computer and must use a chip instead of a tuner.