Does My Truck Need To Relearn Every Time I Fiddle With My Hypertech?

[strictlypersonal]

My truck was running great since it's last trip to the dealer and today I decided to fiddle with my Hypertech with not so good results!

 

I never "uninstall" my hypertech before I go to the dealer and It has been installed it since 04 with no problems. Today I accidentally reprogrammed it back to factory settings and then back to my custom settings. After I reprogrammed it, the truck was pinging a bit and lugging of the line although, It seems to be getting better the more I drove it!

 

My guess is when I took it the dealer a couple of weeks ago for a "Check engine light" and after the $100. 00 fix, by the way, it ran excellent with even better gas mileage! maybe I erased some updates or something?

 

Could I have erased anything or does it just need time to relearn or I do I need to take it to the shop and have it checked?

 

I believe I bought my hypertech in 04, for my GMC 2002, Yukon 4X4.

 

Any ideas?

 

KevinM

[sonjaab]

K.........I also run a Hypertech 3.

But from reading posts from others with all different PCM tunes its

always better to pull out the tune or swap PCMs.

 

I am guessing that when a "tuned" GM is hooked up to the Tech 2

machine at the dealer and updates are performed the tune (or some

parameters) are erased or modified.

 

I am showing a SES light on my 04 (due to a loose gas cap IMO)

so its off to the dealer for warranty service. I will pull out my

tune....just in case !...........geo

[strictlypersonal]

Update:

 

Today, the day after reprogramming my Hypertech, My Yukon is running great! It must have been a relearn and a rather quick one at that!

 

I'm definitely looking into a mail in order PCM or if I could find a good tuner In the area, that would work as well! (Orange County Ca.)

 

KevinM

[redvett]

Yes when you change any calibrations the PCM has to relearn usually in 100 miles or so.