After flashing a tune does your car take forever to relearn idle?

01MGGT · February 7th, 2011, 12:12 AM

So next chance I get I need to flash a new tune to my ECU to change the 2 step rev limiter. But I dread a re flash because it seems the car takes forever to relearn the idle. I have had it take like 80 miles before. It's so damn annoying. The idle will be kind of high or it will hang a bit between shifts and other little things that make doing a relfash at the track pointless. Anyone else experience this? I am using a Sniper tuning system.

f8youthmidman · February 7th, 2011, 12:51 AM

I haven't ever used a tuner but I haven't heard of anyone having this problem before. (I could be completely wrong though lol)

andrewskaggs · February 7th, 2011, 01:04 AM

I have an SCT SF3 and haven't had the problem. Where are you getting your tune from?

pitbull4.6 · February 7th, 2011, 01:17 AM

Not the same year but mine does the same thing. If I reflash, it take forever to relearn. I dred going in heavy traffic after a reflash, it will stall sometimes and other times it will idle to high.

stangpride04 · February 7th, 2011, 01:20 AM

I dont think it has to do with your flash if it's idling high and/or sticking high in between shifts. trust me i've had the problem for the last 2 years. Before i got the tune it would do that, after the tune it was fine for about 30 mins worth of driving then it'd get outta wack again. every year i try to narrow it down and i just can't pinpoint it. Vaccum leak? IAC valve? Throttle position sensor? MAF? Sct flash tuner.. so far no luck, seems to be not as bad in colder weather though if that's any kind of clue ?

01MGGT · February 7th, 2011, 01:54 AM

It's for sure only after flashing a tune. I think it may do it after resetting ecu but can't remember. Once it does relearn idle it's perfect with no issues what so ever. No idea what causes it.

ytngt · February 7th, 2011, 07:18 AM

The problem is your tune. There are multiple variable and tables in the PCM that control idle. Then there is ISC Integrator value, over time it's value gets stored in KAM as an offset. This is what is taking the time to "relearn".

The fix is simple, get someone knowledgeable to fix your tune.

01KnightRiderGT · February 7th, 2011, 07:23 AM

That happens to me as well. Anytime i change something via my Diablo tuner, it take a couple of days for the "hanging revs" to go away.

February 7th, 2011, 12:12 AM	#1
01MGGT Hardcore Enthusiast Join Date: Oct 2009 Location: Alamogordo NM Holloman AFB Posts: 1,200 iTrader: 0 reviews	After flashing a tune does your car take forever to relearn idle? So next chance I get I need to flash a new tune to my ECU to change the 2 step rev limiter. But I dread a re flash because it seems the car takes forever to relearn the idle. I have had it take like 80 miles before. It's so damn annoying. The idle will be kind of high or it will hang a bit between shifts and other little things that make doing a relfash at the track pointless. Anyone else experience this? I am using a Sniper tuning system. __________________ 375hp 380tq Vortech v1 7.5 psi CMS stg1 Cams 75mm TB/Plenum Flows O/R X AFM MrFreeze Meth Steeda Springs Sniper vids http://www.youtube.com/user/01mggt Mineral Grey Club member #14 Military Crew E-4 Predator Crew Chief Holloman

February 7th, 2011, 12:51 AM	#2
f8youthmidman Enthusiast 2001 Bullitt 2 minutes @ extra slow Join Date: Jan 2008 Location: Houston/College Station, TX Posts: 542 iTrader: 0 reviews	I haven't ever used a tuner but I haven't heard of anyone having this problem before. (I could be completely wrong though lol) __________________ SLP headers and Catted X, Magnaflow CB, Cobra Brakes, Drilled/Slotted 13" front and 11.5" rear rotors, MGW short-throw, aluminum intake manifold, cobra clutch, lowered, 3.73 gears, Steeds LCA's, FFRP UCA's, Steeda UDP's, Desencharger CAI

February 7th, 2011, 01:04 AM	#3
andrewskaggs Hardcore Enthusiast 2003 Mustang GT 8.26@83.06 (1/8) Join Date: Apr 2010 Location: Henderson, TN Posts: 1,104 iTrader: 4 reviews	I have an SCT SF3 and haven't had the problem. Where are you getting your tune from? __________________ SLP :: SCT :: Eaton :: Maximum Motorsports :: Baseline Suspensions :: Strange Engineering MM Bracket Racing Crew BAMA Performance Drag Team #1 Project Thread :: YouTube Channel

February 7th, 2011, 01:17 AM	#4
pitbull4.6 Enthusiast 06 mustang gt Join Date: Dec 2009 Location: edmonton Posts: 864 iTrader: 0 reviews	Not the same year but mine does the same thing. If I reflash, it take forever to relearn. I dred going in heavy traffic after a reflash, it will stall sometimes and other times it will idle to high. __________________ Bottle Fed

February 7th, 2011, 01:20 AM	#5
stangpride04 Regular 04 GT Join Date: Feb 2009 Location: NWindiana Posts: 187 iTrader: 3 reviews	I dont think it has to do with your flash if it's idling high and/or sticking high in between shifts. trust me i've had the problem for the last 2 years. Before i got the tune it would do that, after the tune it was fine for about 30 mins worth of driving then it'd get outta wack again. every year i try to narrow it down and i just can't pinpoint it. Vaccum leak? IAC valve? Throttle position sensor? MAF? Sct flash tuner.. so far no luck, seems to be not as bad in colder weather though if that's any kind of clue ? __________________ If the Westboro Baptist Church is allowed to protest at funerals of slain soldiers than I think I will just have to back the @$$ end of my stang right up to their doors early on a Sunday morning and dump the freakin clutch...

February 7th, 2011, 01:54 AM	#6
01MGGT Hardcore Enthusiast Join Date: Oct 2009 Location: Alamogordo NM Holloman AFB Posts: 1,200 iTrader: 0 reviews	It's for sure only after flashing a tune. I think it may do it after resetting ecu but can't remember. Once it does relearn idle it's perfect with no issues what so ever. No idea what causes it. __________________ 375hp 380tq Vortech v1 7.5 psi CMS stg1 Cams 75mm TB/Plenum Flows O/R X AFM MrFreeze Meth Steeda Springs Sniper vids http://www.youtube.com/user/01mggt Mineral Grey Club member #14 Military Crew E-4 Predator Crew Chief Holloman

February 7th, 2011, 07:18 AM	#7
ytngt Enthusiast 2002 Mustang GT Join Date: Apr 2010 Location: LA Posts: 953 iTrader: 0 reviews	The problem is your tune. There are multiple variable and tables in the PCM that control idle. Then there is ISC Integrator value, over time it's value gets stored in KAM as an offset. This is what is taking the time to "relearn". The fix is simple, get someone knowledgeable to fix your tune. __________________

February 7th, 2011, 07:23 AM	#8
01KnightRiderGT Hardcore Enthusiast 2001 Mustang GT Join Date: Feb 2009 Location: Miami,FL Posts: 1,817 iTrader: 0 reviews	That happens to me as well. Anytime i change something via my Diablo tuner, it take a couple of days for the "hanging revs" to go away. __________________ Black Stang Member #13 315's Crew Founder My Track Videos

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