i have a 95 civic vx and is throwing a code 48. which says LAF sensor or circuit is unplugged or damaged. is my car suppose to eat so much gas like a v8 if it is the problem?? pls help me.

 

good question, i have a 92 vx and with a bad oxygen sensor im only getting 32mpg. it sucks, but the sensors are ridiculously expensive.

 

if you could take a picture of it i might have it

 

its a 5 WIRE oxygen sensor, only avail appl. are 92-95 civic VX w/ 49 state emmisions, and 96-99 civic HX w/ manual transmission and 49 state emmisions. if you got one let us know. i need one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stupidricer &raquo;</TD></TR><TR><TD CLASS="quote">i have a 95 civic vx and is throwing a code 48. which says LAF sensor or circuit is unplugged or damaged. is my car suppose to eat so much gas like a v8 if it is the problem?? pls help me. </TD></TR></TABLE>
short answer.... yes it is.
replace the O2, reset he ECU and you'll be fine.

 

Okay i have another question. i fixed that o2 problem. now my engine bogs or what ever when i punch the gas after i say half a sec then the engine finally responds. seems liek something is holding the engine from responding when i punch it. then also when im driving in first and second starting at around 2200 rpm and climbing through it the engine studders like maybe the fuel isnt shooting properly. btw it has a 92-95 ex manifold swapped into it by the previous owner. maybe this is why it does that? maybe cuz it has 1.6 injector and the motor is 1.5? running on stock ecu. i get no engine light though. also, i cleaned the injectors and replaced the o rings and fuel filter. somone help again ASAP pls.

 

holy ****, thats the same exact problem im having. its like fuel cut at low throttle. SOMEONE HAS TO HAVE FIXED THIS BEFORE.

 

bump for us.

 

the VX has a natural tendancy to stumble when it comes out of lean burn mode, maybe that's what you are feeling?
it could also be a ton of other things.

the EX manifold may make the VX engine not work properly but it shouldn't cause this.
the injectors are the basically same between the VX and a lot of other honda models. (240cc)

 

yeah, i get the typical stumble, but this is totally differant, its like fuel cut. or a limiter. mine normally occurs when say i pull away from a light accelerating its fine until i reach the speed i want and hold constant throttle, then it just stumbles, and goes buh, buh. if i hit the gas harder it quits until i hold the throttle steady again.

 

bump, just checked out the o2, voltage stayed between 1.999 and 3.110, also checked tps, voltage at closed throttle is .50 WOT is 4.60. BUMP

 

I'm curious... how did you check the O2 voltage?

 

dvom lead to signal and other lead grounded. i found the parameters for the LAF, and 2.11111-3.20000 is stoich, so its not a fuel mixture problem. im thinking its spark, but usually a bad secondary ignition causes more problems under load not cruising rpm. also, i dont remember if i said or not, but this problem only happens after the motor is completely warm. i should also add that my EGR is blocked off by a plate between the manifold and the egr, hoping it would fix the problem, but it didnt, so i just left the block off plate there.

 

ummm which lead? there are two signal wires and a reference wire to the O2 signal on a L1H1.

 

oh really, i just used the one going to D14 i think, the white wire. was that correct.

 

bump

 

i thought the vx came wiht an egr? and the ex doesnt?

 

thats correct, i am using my stock manifold, the OP is not. i blocked my EGR, his doesnt have one, point is we have the same problems w/ differant combo's so its not the fact that he's running a z6 manifold, or that my EGR is blocked. i wish relic would get back on.

 

TTT

 

ya this sucks ***... i dont think its the o2 either cuz i replaced the o2 sensor with a brand new one. now it is not throwing any engine check lights and seem to run fine except for when i gas it. maybe it could be bad tps sensor or unpluged vacuum hoses?

 

hey scardbody i got my o2 sensor on ebay for i think 140 total thats pretty cheap compared to the 300 buks they ask for at retail ah!!! but damn thats bull **** that the car does that. buh buh lol. but uh i threw in a p28 ecu the vtec kicks hard! its halarious except for the fact that it does that buhhh thing or bogs out.

 

also schard if ur car stumbles at low rpm lets say at around 2200+ rpm and does it when climbing through it, it could be ur injectors and fuel filter. after i cleaned that it doesnt do it anymore. but still bogs out when the gas is punched...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schardbody &raquo;</TD></TR><TR><TD CLASS="quote">oh really, i just used the one going to D14 i think, the white wire. was that correct.</TD></TR></TABLE>
D14 is the white wire, normally used for the O2 signal on a four-wire setup.
But I'm not so sure the readings off the L1H1 sensor can be used like that. I don't know enough about how it works to say one way or the other.

a lack of EGR may cause this. The ECU is expecting the EGR to open/close and may change the injector pulse to compensate.
But honestly I'm not sure. there are way too many variables here to make a guess.

 

well, the egr block-off was an attempt to fix this, nothing changed after it, except MPG went up to 39 from around 36-37. im bout to the point of just swapping it, just dont really have the time right now. oh well.

 

hey guys my car is breathing or idling up and down how do i fix this cuz i wanna smog my car pls someone help me