need v6 long tube help.

Mr. Red Pony · March 9th, 2010, 12:01 PM

ok. i just put long tube headers and HF cats on my 3.8. i removed and turned off the rear o2s the my sf4. it is backfiring at idleand when i shift. could the missing o2s cause this? also i seafoamed it the day i got it back. i was thinking maybe the computer was still adapting and the seafoam threw it a curveball. or the o2s. anythin else it might be? also it doesnt do it much when it is at OP temp. and is doing it less now.

One Bad Sixxx · March 9th, 2010, 01:42 PM

I think you need the rear ones and you can delete the front ones? Thats how it was with mine after my longtube install, anyway. Bought Steeda extensions and did away with the rears and my check engine light never went away and car ran like a bag of ass.

Reversed the process, deleted the fronts and extended the rears and the car ran fine from the get-go.

ewells2420 · March 9th, 2010, 03:13 PM

Originally Posted by One Bad Sixxx

I think you need the rear ones and you can delete the front ones? Thats how it was with mine after my longtube install, anyway. Bought Steeda extensions and did away with the rears and my check engine light never went away and car ran like a bag of ass.

Reversed the process, deleted the fronts and extended the rears and the car ran fine from the get-go.

What ... the .... F...... NO! The rears are to make sure your cats are working. The fronts are to control your AFR. You need the fronts.

b1gdaddy98 · March 9th, 2010, 03:33 PM

Yo ewells it sounds like u got a nice lil setup according to ur signature thing but why you got 3 negative bars? what in the world have you done to get those?

on a side note I've heard many people on the forums say they've deleted their front o2s...sorry to thread jack real quick

but yeah I do know you need the rear ones!

Mr. Red Pony · March 9th, 2010, 04:27 PM

Well this is my first post and it took me a while to figure out how to make one. So i posted on someone elses and they got pissed. that was this morning btw. then i found the new thread button. still dont know how to quote. lol

But it seams to be running fine now. no backfire. i guess it was just too much stuff at once for my ECU to handle.

b1gdaddy98 · March 9th, 2010, 04:31 PM

all you have to do is click quote and it'll quote the whole post that the person did, u can delete characters though so it'll say just what you want it to.

glad to hear it's running right

rfcsoulja · March 9th, 2010, 10:43 PM

Originally Posted by ewells2420

What ... the .... F...... NO! The rears are to make sure your cats are working. The fronts are to control your AFR. You need the fronts.

x10000. The front O2s are the important ones.

Originally Posted by b1gdaddy98

Yo ewells it sounds like u got a nice lil setup according to ur signature thing but why you got 3 negative bars? what in the world have you done to get those?

on a side note I've heard many people on the forums say they've deleted their front o2s...sorry to thread jack real quick

but yeah I do know you need the rear ones!

^ Someone lied to you. The rears only let you know if the cats are working or not. The fronts work with your MAF (I believe) to help control the air/fuel ratio.

Mr. Red Pony · March 9th, 2010, 11:07 PM

Someone lied to you. The rears only let you know if the cats are working or not. The fronts work with your MAF (I believe) to help control the air/fuel ratio.

You believe...

b1gdaddy98 · March 9th, 2010, 11:09 PM

all i'm saying is if you look at some of the tuner threads there are numerous people talkin bout they deleted their front o2s

Mr. Red Pony · March 9th, 2010, 11:12 PM

Originally Posted by b1gdaddy98

all i'm saying is if you look at some of the tuner threads there are numerous people talkin bout they deleted their front o2s

Im liking the quote thing. lol.

But idgas either way. my car is running and thats all i care...

One Bad Sixxx · March 9th, 2010, 11:14 PM

Thats why I said, I deleted my rears and there was nothing I could do, even with tuning it, to make the car run right or even keep the Check Engine Light off. I swapped and deleted the front ones and it worked. I havent had an issue since. So unless we all have freak-of-nature cars, however you get it to work, by all means.

b1gdaddy98 · March 9th, 2010, 11:15 PM

exactly! thanks for clearing that up glad yalls cars are running good without the o2...

b1gdaddy98 · March 9th, 2010, 11:16 PM

btw rep me please i need 11 more points

Mr. Red Pony · March 9th, 2010, 11:18 PM

Originally Posted by b1gdaddy98

btw rep me please i need 11 more points

rep? lol

One Bad Sixxx · March 9th, 2010, 11:20 PM

yea, rep. duh. i just rep'd.

b1gdaddy98 · March 9th, 2010, 11:20 PM

lol he dont know what it is...click the little scale thingy below my name and click i approve then put ur name or something

Mr. Red Pony · March 9th, 2010, 11:22 PM

Originally Posted by b1gdaddy98

lol he dont know what it is...click the little scale thingy below my name and click i approve then put ur name or something

done. return the favor pour favour?

b1gdaddy98 · March 9th, 2010, 11:24 PM

I can't, i'm out for 24 hours i'll have to get you tomorrow!

F8L GT · March 9th, 2010, 11:25 PM

Must be different on a sixxer. Us v8 guys need our front o2s as thats what controls tha A/F ratio. The rears on the 8s are only to tell the computer if the cats are working or not.

One Bad Sixxx · March 9th, 2010, 11:26 PM

^^ That may be it, I wouldnt have taken into account the size of the engine...

March 9th, 2010, 12:01 PM	#1
Mr. Red Pony Resident badass 01 Built V6 (3.9) 13.91 @ 99.1 N/A Join Date: Jan 2010 Location: Lawton, Oklahomo Posts: 6,789 iTrader: 10 reviews	need v6 long tube help. ok. i just put long tube headers and HF cats on my 3.8. i removed and turned off the rear o2s the my sf4. it is backfiring at idleand when i shift. could the missing o2s cause this? also i seafoamed it the day i got it back. i was thinking maybe the computer was still adapting and the seafoam threw it a curveball. or the o2s. anythin else it might be? also it doesnt do it much when it is at OP temp. and is doing it less now.

March 9th, 2010, 01:42 PM	#2
One Bad Sixxx Enthusiast '02 4.3L V6 / '95 GT 5.0L Join Date: Apr 2007 Location: Nellis AFB, Las Vegas, Nevada Posts: 515 iTrader: 0 reviews	I think you need the rear ones and you can delete the front ones? Thats how it was with mine after my longtube install, anyway. Bought Steeda extensions and did away with the rears and my check engine light never went away and car ran like a bag of ass. Reversed the process, deleted the fronts and extended the rears and the car ran fine from the get-go. __________________

March 9th, 2010, 03:33 PM	#4
b1gdaddy98 Hardcore Enthusiast 1998 Mustang V6 Vert Join Date: Feb 2010 Location: North Carolina Posts: 1,358 iTrader: 0 reviews	Yo ewells it sounds like u got a nice lil setup according to ur signature thing but why you got 3 negative bars? what in the world have you done to get those? on a side note I've heard many people on the forums say they've deleted their front o2s...sorry to thread jack real quick but yeah I do know you need the rear ones! __________________ NCMM ORIGINAL NCMM Home Page Vert Crew #03

March 9th, 2010, 04:31 PM	#6
b1gdaddy98 Hardcore Enthusiast 1998 Mustang V6 Vert Join Date: Feb 2010 Location: North Carolina Posts: 1,358 iTrader: 0 reviews	all you have to do is click quote and it'll quote the whole post that the person did, u can delete characters though so it'll say just what you want it to. glad to hear it's running right __________________ NCMM ORIGINAL NCMM Home Page Vert Crew #03

March 9th, 2010, 11:09 PM	#9
b1gdaddy98 Hardcore Enthusiast 1998 Mustang V6 Vert Join Date: Feb 2010 Location: North Carolina Posts: 1,358 iTrader: 0 reviews	all i'm saying is if you look at some of the tuner threads there are numerous people talkin bout they deleted their front o2s __________________ NCMM ORIGINAL NCMM Home Page Vert Crew #03

March 9th, 2010, 04:27 PM	#5
Mr. Red Pony Resident badass 01 Built V6 (3.9) 13.91 @ 99.1 N/A Join Date: Jan 2010 Location: Lawton, Oklahomo Posts: 6,789 iTrader: 10 reviews	Well this is my first post and it took me a while to figure out how to make one. So i posted on someone elses and they got pissed. that was this morning btw. then i found the new thread button. still dont know how to quote. lol But it seams to be running fine now. no backfire. i guess it was just too much stuff at once for my ECU to handle.

March 9th, 2010, 11:14 PM	#11
One Bad Sixxx Enthusiast '02 4.3L V6 / '95 GT 5.0L Join Date: Apr 2007 Location: Nellis AFB, Las Vegas, Nevada Posts: 515 iTrader: 0 reviews	Thats why I said, I deleted my rears and there was nothing I could do, even with tuning it, to make the car run right or even keep the Check Engine Light off. I swapped and deleted the front ones and it worked. I havent had an issue since. So unless we all have freak-of-nature cars, however you get it to work, by all means. __________________

March 9th, 2010, 11:15 PM	#12
b1gdaddy98 Hardcore Enthusiast 1998 Mustang V6 Vert Join Date: Feb 2010 Location: North Carolina Posts: 1,358 iTrader: 0 reviews	exactly! thanks for clearing that up glad yalls cars are running good without the o2... __________________ NCMM ORIGINAL NCMM Home Page Vert Crew #03

March 9th, 2010, 11:16 PM	#13
b1gdaddy98 Hardcore Enthusiast 1998 Mustang V6 Vert Join Date: Feb 2010 Location: North Carolina Posts: 1,358 iTrader: 0 reviews	btw rep me please i need 11 more points __________________ NCMM ORIGINAL NCMM Home Page Vert Crew #03

March 9th, 2010, 11:20 PM	#15
One Bad Sixxx Enthusiast '02 4.3L V6 / '95 GT 5.0L Join Date: Apr 2007 Location: Nellis AFB, Las Vegas, Nevada Posts: 515 iTrader: 0 reviews	yea, rep. duh. i just rep'd. __________________

March 9th, 2010, 11:24 PM	#18
b1gdaddy98 Hardcore Enthusiast 1998 Mustang V6 Vert Join Date: Feb 2010 Location: North Carolina Posts: 1,358 iTrader: 0 reviews	I can't, i'm out for 24 hours i'll have to get you tomorrow! __________________ NCMM ORIGINAL NCMM Home Page Vert Crew #03

March 9th, 2010, 11:25 PM	#19
F8L GT !FACEPLATED! 2002 Mustang GT 7.84 @ 86.01 Join Date: Jul 2008 Location: Upper Michigan Posts: 12,917 iTrader: 13 reviews	Must be different on a sixxer. Us v8 guys need our front o2s as thats what controls tha A/F ratio. The rears on the 8s are only to tell the computer if the cats are working or not. __________________ MM Bracket Racing Crew Co-Founder ~Its a Drag Car, Not a Show Car~ LINK-->Custom Race Transmission Build<--LINK

March 9th, 2010, 11:26 PM	#20
One Bad Sixxx Enthusiast '02 4.3L V6 / '95 GT 5.0L Join Date: Apr 2007 Location: Nellis AFB, Las Vegas, Nevada Posts: 515 iTrader: 0 reviews	^^ That may be it, I wouldnt have taken into account the size of the engine... __________________

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