Hi I'm new to this I was wondering if I do bigger coil packs and bigger injectors do I need to reprogram the computer

 

For bigger injectors yes, but it would be total waste of money unless you have done something to the motor so that it requires more fuel than the stock injectors can supply.

 

I have new headers on the way I'm gonna do grantelli coils boss intake bigger throttle body I have a Roush exhaust system and age cold air intake

 

I don't see any need for bigger injectors with that.

 

Coils & Exhaust = NO
Boss Intake, Throttle Plate, C.A.I. & Injectors = YES

Although IMO u wouldn't need to change Injectors for that stuff, but it wouldn't hurt to check with a reputable company like "5 Star Tuning" to get their opinion. The Coyote is a pain as far as even a C.A.I. requires tuning changes, which is why I have a K&N in my OE air-box still.

Let us know

 

I was gonna call 5 star and have them do a tune for the truck as well

 

I purchased and sct x4, I believe, through 5star. Got the cheap gas: economy tune, tow/performance tune,
and for 93 Oct, performance.
cheap eco tune is total waste unless you never go over 45mph. At which point, 5star told me the tow/performance tune, get better mpg. It proves true on my 11 f150 2wd supercrew. The 93perf tune almost killed my computer. The truck would not run properly and went in to hard core limp mode. Contacted 5star, they revised tune, and sent to me but did the exact same thing. So of the 3 tunes I paid for, only 1, the cheap gas tow/performance, is only one I can use. You will have to do a detailed data log, and send it to them so they can write you a tune. That might work. Also when comp went to limp mode, it threw computer not compatible, codes and the computer will not communicate so I cant do data log to send in so they can see what went wrong, when it went wrong.