tunes and switching back and forth
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Senior User
Joined: Aug 2004
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tunes and switching back and forth
So I have had my SCT tuner for about 5 years. It has Gearhead tunes on it. My truck was bought new and has never run anything but stock with the exception of a trial of the tunes just to see if it really made a difference. I got the tuner to turn my cel off due to egr delete. Yea, it makes a difference alright.
Ive always run stock because I tow and I'm real conservative about that with my truck and plan on having it a lonnnnnng time. My question is about the computer and switching all that program stuff back and forth. Now that those who have run programs and who have switched back and forth from stock to whatever and then back again, does it increase the chances of having any problems other than the mechanical issues that have been addressed for years?
Ive always run stock because I tow and I'm real conservative about that with my truck and plan on having it a lonnnnnng time. My question is about the computer and switching all that program stuff back and forth. Now that those who have run programs and who have switched back and forth from stock to whatever and then back again, does it increase the chances of having any problems other than the mechanical issues that have been addressed for years?
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
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From: Central Oregon
I switch numerous times a year. I run Matt's 8K tow tune as my daily driver. When I tow, I use the Unlimited tow tune. When I get tested, I return to stock. When I get done towing for the weekend, I return to 8K again.
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Senior User
Joined: Aug 2004
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well there ya go. No doubt my paranoia is unfounded because amdriven, you are doing what I certainly have the capability of doing but have been unsure about the reliability of doing such to the engine and it not fouling something up. That's why I asked. I always appreciate the forum. Thanks
Senior User
Joined: Nov 2015
Posts: 370
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From: Spartanburg, SC
I talked to sct today, and they said that they recommend that you put the stock tune on the truck when switching from one tune to another. Not really sure if it's totally necessary, maybe others can chime in but that's just what they told me.
Fleet Mechanic
Joined: Jan 2007
Posts: 1,708
Likes: 7
From: Circle City
It sounds like they don't trust their product to retain the stock tune.
Wether it's from operator error at the OBDII plug or yanking on it out by the cord potentially corruption during the transfer. It's good advice. All they see are SCT's and they have all kinds of customers.
Wether it's from operator error at the OBDII plug or yanking on it out by the cord potentially corruption during the transfer. It's good advice. All they see are SCT's and they have all kinds of customers.
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
You sure that wasn't for changing out tunes on the box itself? Manual on my 3015 says always flash to stock before updating the tuner.
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Lead Driver
Joined: May 2014
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From: Virginia Beach VA
I wouldn't think twice about flashing back to stock if updating the tuner, plugging that into my laptop, never know what will happen. I do go from tune to tune without going back to stock first, jumping from tow to performance.
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Lead Driver
Joined: Sep 2003
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From: Other side of the sunrise
I used to change from tune to tune without returning to stock. That is, until I had a long start issue one day just after changing the tune the day before. I had thought I was in for a costly repair and stressed for a few day. Then, on a whim, I recalled that I had changed the tune just before the problem started so I changed back to stock, then back to the desired tune and the long start problem went away. I think there may have been remnant data that corrupted the tune or something. Anyway, I have since decided to go back to stock before changing tunes. Just part of the process for me now.
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