Dealer says I need an update, truck has the original 2004 programming and gets great milage in the 20's. I understand that a re-flash will kill my mpg.
I'm having surging and rough idle which is why it is at the dealer in the first place.
I'm planning to put a tune on it anyway so I'm wondering if I should just save the re-flash money and get my livewire right now.
What are the downfalls of not doing the factory re-flash prior to custom tuning? Will my symptoms persist even with the tunes without the re-flash?
It's not that much to flash it but I don't want it to be a waste of $ AND kill my milage if the tunes will fix it anyway.
I'm having surging and rough idle which is why it is at the dealer in the first place.
I'm planning to put a tune on it anyway so I'm wondering if I should just save the re-flash money and get my livewire right now.
What are the downfalls of not doing the factory re-flash prior to custom tuning? Will my symptoms persist even with the tunes without the re-flash?
It's not that much to flash it but I don't want it to be a waste of $ AND kill my milage if the tunes will fix it anyway.
