[dschrier]

Sometimes right after I have started my car and I'll be driving in first or second, the car seems like its gonna stall, then it lurches forward as if someone slammed on the gas. I have changed just about everything but the egr valve and the plugs. Could this be a bad o2 sensor? My car has 143,000 on it and I doubt its ever been changed.

 

[00sentra]

the o2 sensor just turn on your check engine light and shouldnt affect the car in any other aspect, well thats the way it was on my old Ford tempo.

 

[BORNGEARHEAD]

An o2 sensor can get slow but may not set a code. I thought mine was getting bad and just replaced it. I noticed better gas mileage when I did.

 

[sentrastud]

the majority of B12's dont have a check engine light... Only the high end models.

-Nick

 

[RiceBox]

You can just check your ECU for codes,

 

[sentrastud]

you need a code checker for that though. I still havent got myself one yet.

-Nick

 

[RiceBox]

you need a code checker for that though. I still havent got myself one yet.

-Nick

uh...no you don't. It shows you how to check them in the Haynes manual. You just watch the little lights flashing the code.

 

[sentrastud]

really? I stand corrected. i never bothered to check for the B12, i thought you needed you needed on of those code cheker things...

-Nick

 

[RiceBox]

The code checkers are for cars built in '95 and later.

 

[sentrastud]

I read up on the ECU checker for our cars. Thats a pretty cool system. One thing I dont get though, after youve got the code, how do you put it back into normal operation mode? The manual wasnt very clear...

-Nick

 

[RiceBox]

I think it automatically goes back to normal.

 

[sentrastud]

like when you restart the car?

-Nick

 

[RiceBox]

When you turn the screw back counter-clockwise the computer will go back to normal.

 

[sentrastud]

ok, i gotcha.

-Nick