o2 probs.. problems NOT fix

General engine questions/issues that aren't specific to the other categories
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o2 probs.. problems NOT fix

By Ajax1989
- Thu Aug 06, 2009 4:52 pm #136101 ok some you know that i have this problem with my car

for some reason it was loosin all its power aftre it warmed up
and it would bog down and i was gettin real shitty gas mileage

well i unpluged my o2 sensor and the car ran great due to it runnin rich
and still have shitty gas mileage cause it spitin it out the exhaust

so my o2 is PLUGED in my car runs normal in OPEN LOOP and as the car heats up it goes into CLOSED LOOP my car runs really lean, which it suppsoed to run rich-lean-rich-lean..so on,

but when my o2 is UNPLUGED my car runs real rich
and it stayes rich throught out both open and closed loop

my question to ya'll is,
is this my o2 or is it somethin else

i dont wanna replace it and have this same problem thats why im askin :thumb:

thanks
Last edited by Ajax1989 on Wed Aug 12, 2009 2:17 pm, edited 5 times in total.
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By Ajax1989
- Thu Aug 06, 2009 5:30 pm #136121 ya i got a buddy wit a 93 dx sedan
ima ask him, i never thought of that
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By Ajax1989
- Fri Aug 07, 2009 12:50 pm #136426 well its down to 3 thngs tht could be wrong wit my car

1. map sensor is bad and makin the car run lean

2. i got a bad injector(s)

3. my o2 is shot

but im to the pt were i wanna burn this shit outta this pos
:x
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By Ajax1989
- Fri Aug 07, 2009 3:15 pm #136477 im gettin one monday

but i was talkin wit my teacher
[i got to UTI mechainc school]

and he told me its one of the 3
so today ima take out the injectors and check them out
make sure there isnt anything in the screens and makse sure
that there all there..lol

and also take out my map and clean it up a lil
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By Ajax1989
- Mon Aug 10, 2009 4:08 am #136938 well i cleaned my injectors and the ports where the injectors sit in the intake manifold

and now i have the famous honda surge
only when i hit my closed loop (op. temp)

my iacv is lil under a yr old
the coolent is full

so what do you guys think the prob could be
:?
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By teal_dx
- Mon Aug 10, 2009 4:35 am #136946 so the original problem is fixed but now your idle is bouncing? vacuum leak maybe? It is something that you recently did or changed... could you have damaged the MAP when you cleaned it?
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By Ajax1989
- Mon Aug 10, 2009 4:39 am #136948 problem fixed

my dumbass did hook up a vacuum line
from the fuel rail to the intake mani
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By Ajax1989
- Wed Aug 12, 2009 2:19 pm #137436 ughhhhhhhhhhh

im bout to blow my car up
it still runnin rich

i have no CEL
nothin

:x :x :x
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By Ajax1989
- Wed Aug 12, 2009 3:08 pm #137484 no the guy that i was gonna get it from forgot

but do you think it could be tellin it to run rich
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By BLaCkSiLo
- Wed Aug 12, 2009 3:14 pm #137488
94_jdm_ferio wrote:no the guy that i was gonna get it from forgot

but do you think it could be tellin it to run rich


well yeah, it's kinda the main component to the AFR's and having a bum o2 can throw off your ecu without throwing a CEL... so i would definitely start there, i know they ain't cheap, my bosch was like $100
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By Ajax1989
- Wed Aug 12, 2009 3:17 pm #137490 ok ima tell that dude i need that o2 hopefully he remebers

but wat makes a o2 go bad?
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