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  #1  
Old 01-27-2010, 01:57 PM
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system too lean, bank 1 and 2?

hey guys.. i recently just gutted and my two larger rear cats on my 02 5.4L f150.. with no muffler and my pipe is cut off right after my passenger side o2 sensor.. i got my SES light on and got two codes.. system two lean on bank 1 and 2. my question is.. which o2 sensors are bank 1 and 2??? i did the GottsO2 mod on my two rear sensors.. did i need to do it on all four???

any help would be greatly appreciated guys.. oh and will this affect my trucks performance at all??

Last edited by qwerty; 01-27-2010 at 02:19 PM.
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  #2  
Old 01-27-2010, 02:14 PM
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You may have a coincidental vacuum leak.
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  #3  
Old 01-27-2010, 02:27 PM
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front uppers.

i just ha the exact same codes on my crown vic - and with the cel light on my performance and mileage was heavily effected. once replaced the o2's everything was fine.
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  #4  
Old 01-27-2010, 06:52 PM
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you just need the Gotts mod on the back 2 sensors
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  #5  
Old 01-27-2010, 10:57 PM
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i have the same exact problem no shop in town can figure it out im about to do the gotts o2 mod.

and yes it does effect proformance and MPG i cant haul anything without bogging it down and im getting about 7-10 MPG i have had it since early december

if you do fix it post it up so i can to

(might be a back pressure problem fixed buy a programmer and custom tune) just a theory though

Last edited by b-ryan; 01-27-2010 at 11:05 PM.
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  #6  
Old 01-27-2010, 11:11 PM
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turns out that i just had a massive massive leak where my headers come into my exhaust piping.. no CEL thus far.. looks like i am good to go.. hopefully
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  #7  
Old 01-28-2010, 04:37 PM
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did you take it to a shop or what???
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  #8  
Old 01-28-2010, 07:22 PM
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no didnt take it to a shop.. my CEL came back on but this time only bank 1 apparently.. will check for vacuum leak tomorrow i guess
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  #9  
Old 01-30-2010, 08:12 PM
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alright. i finally giving up it i get 9 mpg or less this next half tank im taking it to the stealer-ship
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  #10  
Old 01-30-2010, 10:05 PM
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Quote:
Originally Posted by b-ryan View Post
alright. i finally giving up it i get 9 mpg or less this next half tank im taking it to the stealer-ship
Do you like your truck? Reason asking was the last time I read that a guy had a problem with a 2002 truck and when he came back to report how he fixed it he said he fixed it by trading it in on a 2009
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  #11  
Old 01-31-2010, 09:21 AM
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Originally Posted by DarrenWS6 View Post
Do you like your truck? Reason asking was the last time I read that a guy had a problem with a 2002 truck and when he came back to report how he fixed it he said he fixed it by trading it in on a 2009
no i hate my ford. i know you will all hate me but i much rather have a chevy then ford. i grew up with chevys ( found this ford for 4500 01 4x4 5.4 ext cab 165000 miles). and im 17 i dont have the money now to get a new truck until i get my enlistment bonus
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  #12  
Old 01-31-2010, 10:38 AM
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So you cut the exhaust off right after the rear O2's? It could be possible the exhaust is too short causing atmospheric air to enter the exhaust giving a false lean condition. Try adding a piece of exhaust piping to extend it 18" or so.
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  #13  
Old 01-31-2010, 02:38 PM
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Originally Posted by b-ryan View Post
no i hate my ford. i know you will all hate me but i much rather have a chevy then ford. i grew up with chevys ( found this ford for 4500 01 4x4 5.4 ext cab 165000 miles). and im 17 i dont have the money now to get a new truck until i get my enlistment bonus
No hating, We understand. Once you get that money maybe you can upgrade to somethingwith less miles. Buying a vehicle with such high miles always is a risk of problematic issues shortly after, but respect for you buying your truck and maintaining it.
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Exterior: PTM handles/bumpers/mirrors, Harley Davidson grill & valance, PTM Leer 700, 3M 5% tint, Glossy pillars
Interior: Black leather, Audiophile, Weathertechs
Drivetrain: 3" Magnapack SI/DO, Volant intake, PHP Gryphon 89oct, PowerSlot Rotors, Hawk LTS pads, 20" XD Monsters 295/60-20 Nitto M/Ts, Rancho Quiklift/RS9000XL, Moog BJs
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Old 01-31-2010, 02:38 PM


 
 
 
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