knocking after tune

dumps · February 3rd, 2008, 09:14 PM

has anyone encountered this problem? after i installed my kb tune i needed to change back to stock, and after reinstalling the kb tune back in i have a severe misfire / knock. after this i sent the sct back to kenne bell, they said everything was fine with the tune and even sent me a new sct. the car still sounds like a jackhammer but will not display a code. any ideas?

TheUNZippee! · February 3rd, 2008, 10:34 PM

Sounds like the timing is way off. I would keep after them for more help.

GOTTORQ · February 3rd, 2008, 10:37 PM

Originally Posted by TheUNZippee!

Sounds like the timing is way off. I would keep after them for more help.

Agreed, id keep after them, and assure them the cars not running well, and your timing could deffinitely be off

HMUSN · February 3rd, 2008, 10:44 PM

post up a data log.

Trick Tuners · February 3rd, 2008, 11:00 PM

It sounds like you got a bad tune, or have a mechanical issue. Never let the motor knock!!! Read this on detonation. And then this about widebands Try working with KB, but if you can't get your tune straightened out let me know and i can help with the tuning.

06RedfireGT · February 3rd, 2008, 11:13 PM

Get a dyno tune.

dumps · February 3rd, 2008, 11:17 PM

thanks for the reply guys but the problems not the kb tune because the first time i loaded the tune it worked fine. its only when i returned it to stock then back to kb that it started knocking, i tried returning it to factory stock and the same thing happens. nothing like having a new kb on your car and not being able to drive it, especially when its nice and sunny here in southern nj. i tried to go onto the sct troubleshoot forum but it is saying that its down for updates since 11/28/07.

TheUNZippee! · February 3rd, 2008, 11:25 PM

Did you try disconnecting the battery for 15 minutes, and then starting from scratch again? I haven't done this myself, so I don't know if it holds any truth, but I've seen other guys saying that doing so resets things in the PCM.

It's worth a shot for what it takes to disco the battery for 15 minutes.

06RedfireGT · February 3rd, 2008, 11:28 PM

Trick Tuners · February 3rd, 2008, 11:45 PM

when you say return to stock do you mean you pulled the blower and reinstalled the intake?

dumps · February 4th, 2008, 08:22 AM

no, i just installed the stock tune and left the blower on just to see if it would idle regular which it did not. i also tried the reset the ecm thing with no luck. the problem must be with the ecm or the x cal.

stanglifemike · February 4th, 2008, 09:24 AM

Originally Posted by dumps

no, i just installed the stock tune and left the blower on just to see if it would idle regular which it did not. i also tried the reset the ecm thing with no luck. the problem must be with the ecm or the x cal.

How long did you run it this way?

Juggalo_X · February 4th, 2008, 09:26 AM

Pull 3 degrees of timing. if that helps your luky and its just a timing issue.

Trick Tuners · February 4th, 2008, 11:11 AM

Make sure the chip contacts are super clean and rule out any vacuum leaks.

dumps · February 4th, 2008, 11:50 AM

im pretty sure there are no vac leaks i was through with install and went back over everything a couple times after. to answer the other question i only ran the car for a couple seconds at idle a few times, im a diesel mechanic so im pretty auto inclined.

dumps · February 4th, 2008, 03:46 PM

oh, by the way my a/f meter is reading very lean which i think is caused by cylinders misfiring due to computer. keep in mind that the tune provided by kenne bell was running well at one point before i returned to stock and then back to kb. i fear that i might have to send the car to ford to get the ecu checked by the dealers computer. i already called ford parts for new ecm which costs $600+ alone not including the cost to have ford flash the new ecm.

Trick Tuners · February 4th, 2008, 03:53 PM

If you have the big tube CAI you can get up to a full AF point of "adjustment" by messing with the flexible tube in front of the maf and clocking of the MAF.

dumps · February 4th, 2008, 04:45 PM

i just think this goes well beyond just a simple a/f problem, i contacted sct and they said it probably a stuck frame in the ecm, which is not changing paremeters in ecm when being tuned. sct says to take it to get a custom tune or to ford to check the ecm. not looking forward to the bill for that one.

dumps · February 4th, 2008, 09:41 PM

i gone and done it, i'm taking it to big daddys performance in lakewood nj for a custom tune and perhaps cams, not sure i have to talk to him about it. i'm tired of playing around with it and need professional help. thanks guys for all the advice you have given me i appreciate it.

TheUNZippee! · February 4th, 2008, 11:18 PM

Best of luck with her dumps. Bring that baby back and let's see some pictures of the finished product.

February 3rd, 2008, 09:14 PM	#1
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	knocking after tune has anyone encountered this problem? after i installed my kb tune i needed to change back to stock, and after reinstalling the kb tune back in i have a severe misfire / knock. after this i sent the sct back to kenne bell, they said everything was fine with the tune and even sent me a new sct. the car still sounds like a jackhammer but will not display a code. any ideas?

February 3rd, 2008, 10:44 PM	#4
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,049 iTrader: 11 reviews	post up a data log. __________________

February 3rd, 2008, 11:00 PM	#5
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	It sounds like you got a bad tune, or have a mechanical issue. Never let the motor knock!!! Read this on detonation. And then this about widebands Try working with KB, but if you can't get your tune straightened out let me know and i can help with the tuning. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

February 3rd, 2008, 11:13 PM	#6
06RedfireGT One Man Wolf Pack 2006 Mustang GT 13ish....maybe Join Date: Aug 2006 Location: Regulatin On Some OGs Posts: 22,484 iTrader: 2 reviews	Get a dyno tune. __________________ ΜΟΛΩΝ ΛΑΒΕ

February 3rd, 2008, 11:17 PM	#7
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	knock thanks for the reply guys but the problems not the kb tune because the first time i loaded the tune it worked fine. its only when i returned it to stock then back to kb that it started knocking, i tried returning it to factory stock and the same thing happens. nothing like having a new kb on your car and not being able to drive it, especially when its nice and sunny here in southern nj. i tried to go onto the sct troubleshoot forum but it is saying that its down for updates since 11/28/07.

February 3rd, 2008, 11:28 PM	#9
06RedfireGT One Man Wolf Pack 2006 Mustang GT 13ish....maybe Join Date: Aug 2006 Location: Regulatin On Some OGs Posts: 22,484 iTrader: 2 reviews	__________________ ΜΟΛΩΝ ΛΑΒΕ

February 3rd, 2008, 11:45 PM	#10
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	when you say return to stock do you mean you pulled the blower and reinstalled the intake? __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

February 4th, 2008, 08:22 AM	#11
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	knock no, i just installed the stock tune and left the blower on just to see if it would idle regular which it did not. i also tried the reset the ecm thing with no luck. the problem must be with the ecm or the x cal.

February 4th, 2008, 09:26 AM	#13
Juggalo_X I Post Entirely Way Too Much 2001 Mustang 232/CBR600 14+@Slow Join Date: Jan 2007 Location: South Western Ontario Posts: 6,688 iTrader: 0 reviews	Pull 3 degrees of timing. if that helps your luky and its just a timing issue.

February 4th, 2008, 11:11 AM	#14
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	Make sure the chip contacts are super clean and rule out any vacuum leaks. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

February 4th, 2008, 11:50 AM	#15
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	im pretty sure there are no vac leaks i was through with install and went back over everything a couple times after. to answer the other question i only ran the car for a couple seconds at idle a few times, im a diesel mechanic so im pretty auto inclined.

February 4th, 2008, 03:46 PM	#16
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	oh, by the way my a/f meter is reading very lean which i think is caused by cylinders misfiring due to computer. keep in mind that the tune provided by kenne bell was running well at one point before i returned to stock and then back to kb. i fear that i might have to send the car to ford to get the ecu checked by the dealers computer. i already called ford parts for new ecm which costs $600+ alone not including the cost to have ford flash the new ecm.

February 4th, 2008, 03:53 PM	#17
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	If you have the big tube CAI you can get up to a full AF point of "adjustment" by messing with the flexible tube in front of the maf and clocking of the MAF. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

February 4th, 2008, 04:45 PM	#18
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	i just think this goes well beyond just a simple a/f problem, i contacted sct and they said it probably a stuck frame in the ecm, which is not changing paremeters in ecm when being tuned. sct says to take it to get a custom tune or to ford to check the ecm. not looking forward to the bill for that one.

February 4th, 2008, 09:41 PM	#19
dumps Regular 07 mustang gt Join Date: Jan 2007 Location: atco nj Posts: 174 iTrader: 0 reviews	i gone and done it, i'm taking it to big daddys performance in lakewood nj for a custom tune and perhaps cams, not sure i have to talk to him about it. i'm tired of playing around with it and need professional help. thanks guys for all the advice you have given me i appreciate it.

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

Threads Similar to: knocking after tune
Thread	Thread Starter	Forum	Replies	Last Post
dyno tune or downloaded custom tune	silvergtstang99	99-04	2	January 31st, 2008 10:49 AM
knocking or not knocking?	jacutis	V6 Mustangs	12	January 14th, 2008 10:17 PM
knocking	superbeef1000	99-04	10	October 14th, 2007 04:19 PM
Engine knocking	99v6stang	V6 Mustangs	8	May 21st, 2007 01:46 PM
Knocking. Not the Rod Bearings???Pls Help!	tweeaks	V6 Mustangs	18	May 18th, 2007 01:38 PM

All times are GMT -4. The time now is 02:28 AM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.