Fuse pull after a tune? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Issh · 06-17-2014, 10:18 AM

Do I still need to do the fuse pull if I have had my engine tuned with a SCT?

strych9 · 06-17-2014, 10:56 AM

No.

thesaint · 06-17-2014, 02:09 PM

I beg to differ. Every time I have done it, my car is noticeably better.

Slowhawk · 06-17-2014, 03:49 PM

If you pull the fuse after a tune and it "feels better" then the tune is not right.

axis · 06-17-2014, 04:23 PM

Quote:

Originally Posted by thesaint

I beg to differ. Every time I have done it, my car is noticeably better.

Not after a tune.

strych9 · 06-17-2014, 04:40 PM

Quote:

Originally Posted by thesaint

I beg to differ. Every time I have done it, my car is noticeably better.

Yet nobody can produce before and after dyno sheets to prove this. LOL.

thesaint · 06-17-2014, 07:11 PM

Quote:

Originally Posted by Slowhawk

If you pull the fuse after a tune and it "feels better" then the tune is not right.

Could you possibly elaborate on this? It has been said many times over, our cars don't need much of an excuse to jump back to the lower table. It's noticeable, and I'm just giving an honest impression.

To come on here and say your tune isn't right seems rather drastic.

axis · 06-17-2014, 10:25 PM

Quote:

Originally Posted by thesaint

Could you possibly elaborate on this? It has been said many times over, our cars don't need much of an excuse to jump back to the lower table. It's noticeable, and I'm just giving an honest impression.

To come on here and say your tune isn't right seems rather drastic.

Many times they copy the high octane table to the low table, thus eliminating the need to do a fuse pull. Of course it also eliminates the possibility to use anything lower than 91 or 93 octane.

thesaint · 06-18-2014, 05:54 AM

Quote:

Originally Posted by axis

Many times they copy the high octane table to the low table, thus eliminating the need to do a fuse pull. Of course it also eliminates the possibility to use anything lower than 91 or 93 octane.

That actually makes sense to me and I wish that was the case. But I thought I've read on here, comments by many tuners that eliminating the low table was a big no no?

axis · 06-18-2014, 07:50 AM

Quote:

Originally Posted by thesaint

That actually makes sense to me and I wish that was the case. But I thought I've read on here, comments by many tuners that eliminating the low table was a big no no?

I haven't seen that. There are several tuners that do that with no ill effects. The only issue is that you HAVE to run premium fuel from then on. Not like any enthusiast is going to cripple themselves with 87 anyway.

strych9 · 06-18-2014, 08:19 AM

Quote:

Originally Posted by axis

I haven't seen that. There are several tuners that do that with no ill effects. The only issue is that you HAVE to run premium fuel from then on. Not like any enthusiast is going to cripple themselves with 87 anyway.

Axis is correct. Guys getting tunes know this, and run the proper octane for the tune. I have two tunes: 93 and 91 octane. I can readily get 93 octane locally, but if I travel, 91 might be the best I can get. I keep the tuner in the car and swap tunes as needed.

As for the fuel tables on a stock tune, unless you run some crappy fuel or lower octane, it shouldn't change much. Even if you did, the system will readjust itself over time. There is no magic in a fuse pull.

ChibiBlackSheep · 06-18-2014, 08:22 AM

Quote:

Originally Posted by axis

Many times they copy the high octane table to the low table, thus eliminating the need to do a fuse pull. Of course it also eliminates the possibility to use anything lower than 91 or 93 octane.

A lot of times we do that because we are dialing in the engine without the MAF sensor, and it will default to the low octane table when the MAF is disabled. This way we can "tune" the high octane table with the MAF disconnected. Then plug the MAF back in and put the low octane table back and scale the MAF.

But every tuner should put the lower octane table back in, you never know what can happen with fueling and it's good to have that fall back.

Slowhawk · 06-18-2014, 09:17 AM

Quote:

Originally Posted by thesaint

Could you possibly elaborate on this? It has been said many times over, our cars don't need much of an excuse to jump back to the lower table. It's noticeable, and I'm just giving an honest impression.

To come on here and say your tune isn't right seems rather drastic.

Changing settings in the tune will reduce the kick back to low octane. By tuning correctly so it has no excuse to switch is how you do it.

I run low octane table's in all my tunes. I do not copy/paste the high octane table just incase it is needed.

So, if the tune was done properly, you do not have to pull the fuse.

06-17-2014, 10:18 AM	#1
Issh Drives: 2010 Camaro 2SS/RS Summit White Join Date: Jul 2010 Location: Belmont, Ohio Posts: 68	Fuse pull after a tune? Do I still need to do the fuse pull if I have had my engine tuned with a SCT?

06-17-2014, 10:56 AM	#2
strych9 I'll be back... Drives: Subaru, HD Road Glide Special Join Date: Apr 2012 Location: Omaha, NE Posts: 3,036 View My Garage	No. __________________ Bye bye, Bumblebee! --------------------------------------------------------------------------------------- Build Journal My Garage GoPro Mic Hack

06-17-2014, 02:09 PM	#3
thesaint Drives: 2011 camaro ss/rs Join Date: May 2011 Location: south florida Posts: 57	I beg to differ. Every time I have done it, my car is noticeably better.

06-17-2014, 03:49 PM	#4
Slowhawk Drives: 1999 Trans Am Join Date: Jul 2009 Location: Bridgewater,Ma Posts: 2,017	If you pull the fuse after a tune and it "feels better" then the tune is not right.