Backfire at high rpm

hellbred07 · February 23rd, 2009, 01:25 PM

I am got a KB INTERCOOLED KIT supposedly pushing 8psi boost gauge said 10psi still wondering why the real problem is i am getting a backfire or pop.pop, pop, at high rpm and it will continue to do this if i stay in it.Somebody throw something logical out there.

2006GTARPD3 · February 23rd, 2009, 01:28 PM

Learn some english. Logical enough?

Lol j/p man don't start flaming me

07 STROKER · February 23rd, 2009, 01:34 PM

fouled spark plug

hellbred07 · February 23rd, 2009, 01:34 PM

Sorry bro, didn't see that BS i just typed.DAM!

qwik48r · February 23rd, 2009, 04:13 PM

spark plugs for sure.. no way you pegged the maf already.

07 STROKER · February 23rd, 2009, 04:29 PM

everytime i see your avie all i can think about is the 3650 rebuild...

Trick Tuners · February 23rd, 2009, 04:33 PM

What is the AFR when it happens? You should always run a WO2 with forced induction. Is this with the KB tune? Are you sure its not detonation? (make damn sure its not!!). Here is some info on detonation.
Detonation Explained

qwik48r · February 23rd, 2009, 04:51 PM

Originally Posted by 07 procharger

everytime i see your avie all i can think about is the 3650 rebuild...

and promotion is fucking around with my order 07...

I guess they seam to think, education isnt as important as making money.. and yes I told them what I was doing.

I promise, as soon as it here it starts

hellbred07 · February 23rd, 2009, 05:03 PM

I am running the kb tune.Detonation making sounds in the back its not all the time either and happens in different gears,mostly second and forth. Maybe the plugs do need to be changed out,i am hoping that what it is.Calling KB and asking them anything can be a waste of time they make you even more paranoid.

TheUNZippee! · February 23rd, 2009, 05:06 PM

Better paranoid than destroyed engine.

qwik48r · February 23rd, 2009, 05:07 PM

you did pull them and close the gap down to around .030 didnt you? I assume its spark blowout. can you datalog your knock sensors? anything over 2* of KR on a blown car is BAD BAD BAD JU JU... it will destroy your motor.

qwik48r · February 23rd, 2009, 05:08 PM

Originally Posted by TheUNZippee!

Better paranoid than destroyed engine.

freaking AMEN and +1

hellbred07 · February 23rd, 2009, 05:25 PM

Plugs are regular gap where they have been.To explain things a little better i upgraded to the intercooled kit and had the A/F checked 11.6 -.9 was the highest seen,this was a custom tune for a non-intercooled kit that i had problems with till it was custom tuned. The shops tuner said it was fine(JUST A SHOP I WENT TO FOR A A/F CHECK) then as it got colder or whatever happened she started popping from the back. Noticed it when i dropped a forth and when i shifted to forth 2 separate times,i noticed it pulling of from a light wheels skidding in second,pop,pop,pop,pop.It seems to happen when she gets that stand in it kind of driving but gradually going into boost didn't hear anything.Now one day i did a blow by my buddy and he said it was sounding like fire crackers below the hood got the kb tune for the intercooled kit still popping.Idles fine, drives regular but i when i put my foot down it a coin toss.Could the plugs be damaged from the previous pinging and wouldn't that cause the car to idle weird.

qwik48r · February 23rd, 2009, 05:31 PM

sounds like spark blowout.

Anthony05GT · February 23rd, 2009, 05:54 PM

Get some Autolite HTO's and gap them down to .030 to .032

If you don't have a gapping tool specifically for our style plugs just put the plug in the plug socket and squeeze the gap down by putting it in a vise. Don't go too far because it's a bitch to try to open the gap back up.

Trick Tuners · February 23rd, 2009, 06:17 PM

Originally Posted by hellbred07

Now one day i did a blow by my buddy and he said it was sounding like fire crackers below the hood

That sounds like really really bad detonation!! You should get this fixed before you go wot. If you post up a datalog, i'll check it out for you.

hellbred07 · February 23rd, 2009, 07:01 PM

I just set an appointment to get her checked.Datalog i have a predator what am i looking for?

hellbred07 · February 23rd, 2009, 07:02 PM

Won't i hear it upfront and why now?

Trick Tuners · February 23rd, 2009, 07:05 PM

This is based on SCT stuff, but you should be able to figure out what diablo calls these pids. You should hear it up front. Cold air is more dense and can sometimes push the car over the limit if the tune is not setup properly, or on the very jagged edge.
Advanced SCT datalogging and Tune Analysis

qwik48r · February 23rd, 2009, 07:10 PM

I think a bump of about 5-10% in PE might cure it.. either that or just a few degrees out.. I have a feeling he running out of fuel

February 23rd, 2009, 01:25 PM	#1
hellbred07 Enthusiast Join Date: Aug 2007 Location: va Posts: 791 iTrader: 0 reviews	Backfire at high rpm I am got a KB INTERCOOLED KIT supposedly pushing 8psi boost gauge said 10psi still wondering why the real problem is i am getting a backfire or pop.pop, pop, at high rpm and it will continue to do this if i stay in it.Somebody throw something logical out there.

February 23rd, 2009, 01:28 PM	#2
2006GTARPD3 Golf Pencil Kawk Juggler 2006 Mustang GT 509RWHP/450RWT Join Date: Feb 2008 Location: NY Posts: 2,395 iTrader: 0 reviews	Learn some english. Logical enough? Lol j/p man don't start flaming me __________________ Procharger D-1SC Kit - Pypes O/R H - FRPP Stingers Team Ricer GT Co-Founder

February 23rd, 2009, 01:34 PM	#3
07 STROKER MM's resident Juice head 07 Mustang GT Join Date: Nov 2007 Location: PA Posts: 7,933 iTrader: 0 reviews	fouled spark plug __________________ The MGW short throw shifter Its not just a shifter...It's a lifestyle!

February 23rd, 2009, 04:13 PM	#5
qwik48r MM Fanatic alotta shit no fat girls fast Join Date: Jan 2008 Location: in the woods Posts: 3,688 iTrader: 1 reviews	spark plugs for sure.. no way you pegged the maf already. __________________ mind your business what i drive... i'm on a fucking mustang forum. qwik's build

February 23rd, 2009, 04:29 PM	#6
07 STROKER MM's resident Juice head 07 Mustang GT Join Date: Nov 2007 Location: PA Posts: 7,933 iTrader: 0 reviews	everytime i see your avie all i can think about is the 3650 rebuild... __________________ The MGW short throw shifter Its not just a shifter...It's a lifestyle!

February 23rd, 2009, 04:33 PM	#7
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	What is the AFR when it happens? You should always run a WO2 with forced induction. Is this with the KB tune? Are you sure its not detonation? (make damn sure its not!!). Here is some info on detonation. Detonation Explained __________________ 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 23rd, 2009, 05:03 PM	#9
hellbred07 Enthusiast Join Date: Aug 2007 Location: va Posts: 791 iTrader: 0 reviews	I am running the kb tune.Detonation making sounds in the back its not all the time either and happens in different gears,mostly second and forth. Maybe the plugs do need to be changed out,i am hoping that what it is.Calling KB and asking them anything can be a waste of time they make you even more paranoid.

February 23rd, 2009, 05:06 PM	#10
TheUNZippee! Moderator Join Date: Jan 2007 Location: Canada Posts: 61,816 Blog Entries: 1 iTrader: 0 reviews	Better paranoid than destroyed engine. __________________

February 23rd, 2009, 05:07 PM	#11
qwik48r MM Fanatic alotta shit no fat girls fast Join Date: Jan 2008 Location: in the woods Posts: 3,688 iTrader: 1 reviews	you did pull them and close the gap down to around .030 didnt you? I assume its spark blowout. can you datalog your knock sensors? anything over 2* of KR on a blown car is BAD BAD BAD JU JU... it will destroy your motor. __________________ mind your business what i drive... i'm on a fucking mustang forum. qwik's build

February 23rd, 2009, 05:25 PM	#13
hellbred07 Enthusiast Join Date: Aug 2007 Location: va Posts: 791 iTrader: 0 reviews	Plugs are regular gap where they have been.To explain things a little better i upgraded to the intercooled kit and had the A/F checked 11.6 -.9 was the highest seen,this was a custom tune for a non-intercooled kit that i had problems with till it was custom tuned. The shops tuner said it was fine(JUST A SHOP I WENT TO FOR A A/F CHECK) then as it got colder or whatever happened she started popping from the back. Noticed it when i dropped a forth and when i shifted to forth 2 separate times,i noticed it pulling of from a light wheels skidding in second,pop,pop,pop,pop.It seems to happen when she gets that stand in it kind of driving but gradually going into boost didn't hear anything.Now one day i did a blow by my buddy and he said it was sounding like fire crackers below the hood got the kb tune for the intercooled kit still popping.Idles fine, drives regular but i when i put my foot down it a coin toss.Could the plugs be damaged from the previous pinging and wouldn't that cause the car to idle weird.

February 23rd, 2009, 05:31 PM	#14
qwik48r MM Fanatic alotta shit no fat girls fast Join Date: Jan 2008 Location: in the woods Posts: 3,688 iTrader: 1 reviews	sounds like spark blowout. __________________ mind your business what i drive... i'm on a fucking mustang forum. qwik's build

February 23rd, 2009, 05:54 PM	#15
Anthony05GT Hardcore Enthusiast Join Date: Feb 2009 Posts: 1,461 iTrader: 1 reviews	Get some Autolite HTO's and gap them down to .030 to .032 If you don't have a gapping tool specifically for our style plugs just put the plug in the plug socket and squeeze the gap down by putting it in a vise. Don't go too far because it's a bitch to try to open the gap back up. __________________ JDM 302 Stroker, Whipple 10 rib 12 psi, L&M, JBA, J&M, LFP, Corsa, BBR Stage II cams, Manley, MGW, McLeod RST, Metco, Steeda, Autometer, CDC, Street Scene, SOS, Tuned at JPC Racing by Kevin MacDonald

February 23rd, 2009, 07:01 PM	#17
hellbred07 Enthusiast Join Date: Aug 2007 Location: va Posts: 791 iTrader: 0 reviews	I just set an appointment to get her checked.Datalog i have a predator what am i looking for?

February 23rd, 2009, 07:02 PM	#18
hellbred07 Enthusiast Join Date: Aug 2007 Location: va Posts: 791 iTrader: 0 reviews	Won't i hear it upfront and why now?

February 23rd, 2009, 07:05 PM	#19
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	This is based on SCT stuff, but you should be able to figure out what diablo calls these pids. You should hear it up front. Cold air is more dense and can sometimes push the car over the limit if the tune is not setup properly, or on the very jagged edge. Advanced SCT datalogging and Tune Analysis __________________ 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 23rd, 2009, 07:10 PM	#20
qwik48r MM Fanatic alotta shit no fat girls fast Join Date: Jan 2008 Location: in the woods Posts: 3,688 iTrader: 1 reviews	I think a bump of about 5-10% in PE might cure it.. either that or just a few degrees out.. I have a feeling he running out of fuel __________________ mind your business what i drive... i'm on a fucking mustang forum. qwik's build

Remove Advertisements Sponsored Links
Forums at Modded Mustangs Advertisement Advertisement

Threads Similar to: Backfire at high rpm
Thread	Thread Starter	Forum	Replies	Last Post
High Rpm Miss	cptkng79	5.0 Mustangs	9	April 28th, 2008 07:36 PM
high rpm v6	motorhead6776	V6 Mustangs	27	January 30th, 2008 02:07 AM
Please Help With High Rpm Miss	cptkng79	5.0 Mustangs	8	October 1st, 2007 09:54 PM
backfire when shifting at high rpms	ujslost	96-98	2	March 24th, 2007 01:02 AM
1986 5.0 Loss of power above 2500 RPM , and backfire	86-5.0	5.0 Mustangs	1	March 10th, 2007 01:46 PM

All times are GMT -4. The time now is 04:45 AM.
Contact Us - Modded Mustangs - 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.